./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:40:15,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:40:15,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:40:15,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:40:15,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:40:15,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:40:15,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:40:15,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:40:15,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:40:15,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:40:15,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:40:15,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:40:15,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:40:15,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:40:15,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:40:15,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:40:15,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:40:15,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:40:15,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:40:15,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:40:15,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:40:15,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:40:15,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:40:15,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:40:15,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:40:15,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:40:15,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:40:15,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:40:15,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:40:15,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:40:15,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:40:15,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:40:15,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:40:15,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:40:15,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:40:15,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:40:15,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:40:15,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:40:15,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:40:15,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:40:15,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:40:15,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:40:15,388 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:40:15,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:40:15,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:40:15,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:40:15,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:40:15,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:40:15,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:40:15,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:40:15,391 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:40:15,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:40:15,392 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:40:15,392 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:40:15,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:40:15,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:40:15,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:40:15,393 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:40:15,393 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:40:15,394 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:40:15,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:40:15,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:40:15,394 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:40:15,394 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:40:15,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:40:15,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:40:15,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:40:15,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:40:15,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:40:15,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:40:15,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:40:15,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:40:15,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:40:15,396 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:40:15,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:40:15,397 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:40:15,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:40:15,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:40:15,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:40:15,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:40:15,699 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:40:15,699 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:40:15,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-08-29 23:40:16,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:40:17,067 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:40:17,067 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-08-29 23:40:17,073 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8a572ed/5d2b0bf3e5a5432d823ca15eb218e799/FLAGe59c05ea0 [2023-08-29 23:40:17,089 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8a572ed/5d2b0bf3e5a5432d823ca15eb218e799 [2023-08-29 23:40:17,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:40:17,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:40:17,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:40:17,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:40:17,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:40:17,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:40:17" (1/1) ... [2023-08-29 23:40:17,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13bb001a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:17, skipping insertion in model container [2023-08-29 23:40:17,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:40:17" (1/1) ... [2023-08-29 23:40:17,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:40:17,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:40:17,246 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-08-29 23:40:17,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:40:17,263 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:40:17,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2eb7f01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:17, skipping insertion in model container [2023-08-29 23:40:17,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:40:17,264 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:40:17,266 INFO L158 Benchmark]: Toolchain (without parser) took 172.85ms. Allocated memory is still 67.1MB. Free memory was 40.3MB in the beginning and 30.2MB in the end (delta: 10.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-29 23:40:17,266 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:40:17,267 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.91ms. Allocated memory is still 67.1MB. Free memory was 40.1MB in the beginning and 30.2MB in the end (delta: 9.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-29 23:40:17,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 170.91ms. Allocated memory is still 67.1MB. Free memory was 40.1MB in the beginning and 30.2MB in the end (delta: 9.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 153]: 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/parallel-parallel-sum-equiv.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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:40:18,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:40:18,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:40:18,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:40:18,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:40:18,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:40:18,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:40:18,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:40:18,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:40:19,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:40:19,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:40:19,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:40:19,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:40:19,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:40:19,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:40:19,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:40:19,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:40:19,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:40:19,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:40:19,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:40:19,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:40:19,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:40:19,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:40:19,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:40:19,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:40:19,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:40:19,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:40:19,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:40:19,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:40:19,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:40:19,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:40:19,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:40:19,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:40:19,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:40:19,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:40:19,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:40:19,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:40:19,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:40:19,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:40:19,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:40:19,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:40:19,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:40:19,084 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:40:19,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:40:19,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:40:19,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:40:19,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:40:19,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:40:19,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:40:19,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:40:19,088 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:40:19,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:40:19,089 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:40:19,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:40:19,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:40:19,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:40:19,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:40:19,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:40:19,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:40:19,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:40:19,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:40:19,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:40:19,091 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:40:19,091 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:40:19,092 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:40:19,092 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:40:19,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:40:19,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:40:19,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:40:19,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:40:19,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:40:19,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:40:19,094 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:40:19,094 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:40:19,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:40:19,094 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:40:19,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:40:19,095 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:40:19,095 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:40:19,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:40:19,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:40:19,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:40:19,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:40:19,448 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:40:19,449 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:40:19,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-08-29 23:40:20,588 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:40:20,812 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:40:20,813 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-08-29 23:40:20,823 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc5786319/070947cb0ab6459ca7addb69a201d95f/FLAG828fd6a68 [2023-08-29 23:40:20,848 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc5786319/070947cb0ab6459ca7addb69a201d95f [2023-08-29 23:40:20,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:40:20,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:40:20,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:40:20,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:40:20,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:40:20,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:40:20" (1/1) ... [2023-08-29 23:40:20,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcde69d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:20, skipping insertion in model container [2023-08-29 23:40:20,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:40:20" (1/1) ... [2023-08-29 23:40:20,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:40:20,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:40:21,080 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-08-29 23:40:21,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:40:21,116 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:40:21,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:40:21,152 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-08-29 23:40:21,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:40:21,167 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:40:21,201 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-08-29 23:40:21,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:40:21,221 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:40:21,221 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:40:21,227 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:40:21,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21 WrapperNode [2023-08-29 23:40:21,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:40:21,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:40:21,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:40:21,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:40:21,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,286 INFO L138 Inliner]: procedures = 29, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 245 [2023-08-29 23:40:21,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:40:21,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:40:21,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:40:21,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:40:21,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,360 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:40:21,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:40:21,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:40:21,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:40:21,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (1/1) ... [2023-08-29 23:40:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:40:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:40:21,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:40:21,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:40:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:40:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:40:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:40:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:40:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:40:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:40:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:40:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:40:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:40:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:40:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:40:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:40:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:40:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:40:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:40:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:40:21,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:40:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:40:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:40:21,462 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:40:21,636 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:40:21,642 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:40:22,128 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:40:22,258 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:40:22,258 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 23:40:22,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:40:22 BoogieIcfgContainer [2023-08-29 23:40:22,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:40:22,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:40:22,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:40:22,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:40:22,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:40:20" (1/3) ... [2023-08-29 23:40:22,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c604d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:40:22, skipping insertion in model container [2023-08-29 23:40:22,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:40:21" (2/3) ... [2023-08-29 23:40:22,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c604d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:40:22, skipping insertion in model container [2023-08-29 23:40:22,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:40:22" (3/3) ... [2023-08-29 23:40:22,268 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-08-29 23:40:22,281 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:40:22,281 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-29 23:40:22,281 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:40:22,398 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-29 23:40:22,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 226 transitions, 496 flow [2023-08-29 23:40:22,523 INFO L130 PetriNetUnfolder]: 14/209 cut-off events. [2023-08-29 23:40:22,523 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:40:22,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 209 events. 14/209 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 284 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-08-29 23:40:22,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 226 transitions, 496 flow [2023-08-29 23:40:22,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 205 transitions, 440 flow [2023-08-29 23:40:22,542 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:40:22,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 205 transitions, 440 flow [2023-08-29 23:40:22,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 205 transitions, 440 flow [2023-08-29 23:40:22,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 205 transitions, 440 flow [2023-08-29 23:40:22,604 INFO L130 PetriNetUnfolder]: 14/205 cut-off events. [2023-08-29 23:40:22,604 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:40:22,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 205 events. 14/205 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 283 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-08-29 23:40:22,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2023-08-29 23:40:35,504 INFO L134 LiptonReduction]: Checked pairs total: 16355 [2023-08-29 23:40:35,505 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-29 23:40:35,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:40:35,523 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;@1f95309, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:40:35,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-08-29 23:40:35,526 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:40:35,526 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:40:35,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:35,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:35,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:35,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash 34202, now seen corresponding path program 1 times [2023-08-29 23:40:35,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:35,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313483562] [2023-08-29 23:40:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:35,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:35,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:35,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:35,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:40:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:35,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:40:35,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:35,804 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:40:35,805 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:40:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:35,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:35,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313483562] [2023-08-29 23:40:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313483562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:35,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:35,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:35,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926051213] [2023-08-29 23:40:35,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:35,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:36,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-29 23:40:36,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 164 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) [2023-08-29 23:40:36,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:36,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-29 23:40:36,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:37,585 INFO L130 PetriNetUnfolder]: 9550/13111 cut-off events. [2023-08-29 23:40:37,587 INFO L131 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2023-08-29 23:40:37,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26478 conditions, 13111 events. 9550/13111 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 64661 event pairs, 3456 based on Foata normal form. 0/5463 useless extension candidates. Maximal degree in co-relation 26226. Up to 12511 conditions per place. [2023-08-29 23:40:37,717 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 67 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-29 23:40:37,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 83 transitions, 342 flow [2023-08-29 23:40:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-29 23:40:37,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2023-08-29 23:40:37,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-29 23:40:37,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-29 23:40:37,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:37,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-29 23:40:37,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:37,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:37,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:37,762 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 164 flow. Second operand 3 states and 612 transitions. [2023-08-29 23:40:37,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 83 transitions, 342 flow [2023-08-29 23:40:37,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 318 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 23:40:37,780 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 161 flow [2023-08-29 23:40:37,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-08-29 23:40:37,786 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-29 23:40:37,786 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 161 flow [2023-08-29 23:40:37,787 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) [2023-08-29 23:40:37,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:37,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:37,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:37,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:37,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:37,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash 34257, now seen corresponding path program 1 times [2023-08-29 23:40:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:37,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226683974] [2023-08-29 23:40:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:37,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:37,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:38,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:38,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:40:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:40:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:38,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:38,136 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:40:38,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:40:38,161 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 10 treesize of output 8 [2023-08-29 23:40:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:38,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:38,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226683974] [2023-08-29 23:40:38,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226683974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:38,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133652666] [2023-08-29 23:40:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:38,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:38,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:38,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-29 23:40:38,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 161 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) [2023-08-29 23:40:38,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:38,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-29 23:40:38,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:39,521 INFO L130 PetriNetUnfolder]: 7100/9803 cut-off events. [2023-08-29 23:40:39,522 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-29 23:40:39,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19443 conditions, 9803 events. 7100/9803 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 47172 event pairs, 5828 based on Foata normal form. 0/4310 useless extension candidates. Maximal degree in co-relation 19344. Up to 9391 conditions per place. [2023-08-29 23:40:39,575 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 49 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-08-29 23:40:39,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 257 flow [2023-08-29 23:40:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-29 23:40:39,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47044917257683216 [2023-08-29 23:40:39,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-29 23:40:39,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-29 23:40:39,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:39,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-29 23:40:39,580 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) [2023-08-29 23:40:39,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:39,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:39,584 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 161 flow. Second operand 3 states and 597 transitions. [2023-08-29 23:40:39,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 257 flow [2023-08-29 23:40:39,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:39,587 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 156 flow [2023-08-29 23:40:39,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-08-29 23:40:39,588 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-29 23:40:39,589 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 156 flow [2023-08-29 23:40:39,589 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) [2023-08-29 23:40:39,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:39,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:39,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:39,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:39,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:39,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash 34201, now seen corresponding path program 1 times [2023-08-29 23:40:39,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:39,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512012208] [2023-08-29 23:40:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:39,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:39,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:39,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:40:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:39,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:40:39,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:39,903 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:40:39,903 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:40:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:39,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:39,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:39,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512012208] [2023-08-29 23:40:39,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512012208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:39,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:39,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:39,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390643289] [2023-08-29 23:40:39,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:39,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:39,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:40,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-29 23:40:40,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:40,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:40,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-29 23:40:40,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:41,009 INFO L130 PetriNetUnfolder]: 7100/9801 cut-off events. [2023-08-29 23:40:41,009 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-29 23:40:41,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19438 conditions, 9801 events. 7100/9801 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 47125 event pairs, 5764 based on Foata normal form. 0/4310 useless extension candidates. Maximal degree in co-relation 19430. Up to 9259 conditions per place. [2023-08-29 23:40:41,050 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 56 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-29 23:40:41,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 289 flow [2023-08-29 23:40:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-29 23:40:41,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665090622537431 [2023-08-29 23:40:41,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-29 23:40:41,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-29 23:40:41,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:41,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-29 23:40:41,055 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) [2023-08-29 23:40:41,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:41,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:41,058 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 156 flow. Second operand 3 states and 592 transitions. [2023-08-29 23:40:41,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 289 flow [2023-08-29 23:40:41,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 74 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:41,060 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 157 flow [2023-08-29 23:40:41,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-08-29 23:40:41,061 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-29 23:40:41,061 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 157 flow [2023-08-29 23:40:41,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:41,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:41,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:41,074 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 [2023-08-29 23:40:41,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:41,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:41,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 34258, now seen corresponding path program 1 times [2023-08-29 23:40:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080175708] [2023-08-29 23:40:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:41,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:41,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:41,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:41,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:40:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:40:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:41,365 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:40:41,365 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 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-29 23:40:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:41,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:41,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:41,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080175708] [2023-08-29 23:40:41,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080175708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:41,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:41,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771189558] [2023-08-29 23:40:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:41,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:41,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:41,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-29 23:40:41,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:41,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:41,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-29 23:40:41,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:42,179 INFO L130 PetriNetUnfolder]: 4760/6689 cut-off events. [2023-08-29 23:40:42,179 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-29 23:40:42,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13312 conditions, 6689 events. 4760/6689 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 31542 event pairs, 3820 based on Foata normal form. 0/3303 useless extension candidates. Maximal degree in co-relation 13303. Up to 6267 conditions per place. [2023-08-29 23:40:42,204 INFO L137 encePairwiseOnDemand]: 419/423 looper letters, 54 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-29 23:40:42,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 284 flow [2023-08-29 23:40:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-29 23:40:42,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657210401891253 [2023-08-29 23:40:42,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-29 23:40:42,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-29 23:40:42,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:42,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-29 23:40:42,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:42,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:42,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:42,212 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 157 flow. Second operand 3 states and 591 transitions. [2023-08-29 23:40:42,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 284 flow [2023-08-29 23:40:42,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:42,214 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 159 flow [2023-08-29 23:40:42,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-08-29 23:40:42,215 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-29 23:40:42,215 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 159 flow [2023-08-29 23:40:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:42,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:42,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:40:42,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:42,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:42,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:42,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1062162, now seen corresponding path program 1 times [2023-08-29 23:40:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:42,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897388559] [2023-08-29 23:40:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:42,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:42,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:42,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:42,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:40:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:42,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:40:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:42,560 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:40:42,560 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:40:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:40:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:42,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897388559] [2023-08-29 23:40:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897388559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:40:42,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:40:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:40:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585878809] [2023-08-29 23:40:42,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:40:42,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:40:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:40:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:40:43,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 423 [2023-08-29 23:40:43,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 159 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) [2023-08-29 23:40:43,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:43,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 423 [2023-08-29 23:40:43,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:44,426 INFO L130 PetriNetUnfolder]: 4842/6839 cut-off events. [2023-08-29 23:40:44,426 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 23:40:44,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13662 conditions, 6839 events. 4842/6839 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32310 event pairs, 1897 based on Foata normal form. 0/3450 useless extension candidates. Maximal degree in co-relation 13652. Up to 6436 conditions per place. [2023-08-29 23:40:44,458 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 83 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-08-29 23:40:44,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 447 flow [2023-08-29 23:40:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:40:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:40:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1147 transitions. [2023-08-29 23:40:44,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519306540583136 [2023-08-29 23:40:44,463 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1147 transitions. [2023-08-29 23:40:44,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1147 transitions. [2023-08-29 23:40:44,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:44,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1147 transitions. [2023-08-29 23:40:44,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.16666666666666) internal successors, (1147), 6 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:44,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:44,473 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:44,473 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 159 flow. Second operand 6 states and 1147 transitions. [2023-08-29 23:40:44,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 447 flow [2023-08-29 23:40:44,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:44,476 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 232 flow [2023-08-29 23:40:44,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-29 23:40:44,477 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-08-29 23:40:44,478 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 232 flow [2023-08-29 23:40:44,478 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) [2023-08-29 23:40:44,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:44,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:40:44,487 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 (6)] Ended with exit code 0 [2023-08-29 23:40:44,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:44,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:44,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1597108109, now seen corresponding path program 1 times [2023-08-29 23:40:44,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:44,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274959588] [2023-08-29 23:40:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:44,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:44,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:44,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:44,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:40:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:40:44,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:44,804 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 23:40:44,804 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 23:40:44,815 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 42 treesize of output 38 [2023-08-29 23:40:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:44,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:44,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:44,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274959588] [2023-08-29 23:40:44,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274959588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:44,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:44,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651995479] [2023-08-29 23:40:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:44,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:44,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-29 23:40:44,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:44,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:44,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-29 23:40:44,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:45,560 INFO L130 PetriNetUnfolder]: 4764/6704 cut-off events. [2023-08-29 23:40:45,560 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-29 23:40:45,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13391 conditions, 6704 events. 4764/6704 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 31671 event pairs, 3874 based on Foata normal form. 134/3468 useless extension candidates. Maximal degree in co-relation 13377. Up to 6406 conditions per place. [2023-08-29 23:40:45,601 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 51 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-29 23:40:45,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 332 flow [2023-08-29 23:40:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-29 23:40:45,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46808510638297873 [2023-08-29 23:40:45,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-29 23:40:45,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-29 23:40:45,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:45,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-29 23:40:45,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:45,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:45,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:45,609 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 232 flow. Second operand 3 states and 594 transitions. [2023-08-29 23:40:45,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 332 flow [2023-08-29 23:40:45,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 319 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:45,612 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 217 flow [2023-08-29 23:40:45,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-08-29 23:40:45,612 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-08-29 23:40:45,613 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 217 flow [2023-08-29 23:40:45,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:45,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:45,613 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:40:45,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:45,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:45,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:45,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1579983770, now seen corresponding path program 2 times [2023-08-29 23:40:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:45,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594098230] [2023-08-29 23:40:45,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:40:45,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:45,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:45,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:40:45,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:40:45,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:40:45,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:40:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:45,979 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:40:45,979 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:40:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:46,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:40:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:46,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594098230] [2023-08-29 23:40:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594098230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:40:46,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:40:46,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:40:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724687817] [2023-08-29 23:40:46,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:40:46,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:40:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:40:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:40:49,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-29 23:40:49,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 217 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) [2023-08-29 23:40:49,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:49,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-29 23:40:49,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:54,265 INFO L130 PetriNetUnfolder]: 4979/7069 cut-off events. [2023-08-29 23:40:54,266 INFO L131 PetriNetUnfolder]: For 479/479 co-relation queries the response was YES. [2023-08-29 23:40:54,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14435 conditions, 7069 events. 4979/7069 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 33731 event pairs, 3787 based on Foata normal form. 6/3636 useless extension candidates. Maximal degree in co-relation 14420. Up to 6474 conditions per place. [2023-08-29 23:40:54,303 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 160 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2023-08-29 23:40:54,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 196 transitions, 946 flow [2023-08-29 23:40:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:40:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:40:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2654 transitions. [2023-08-29 23:40:54,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481594056062141 [2023-08-29 23:40:54,313 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2654 transitions. [2023-08-29 23:40:54,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2654 transitions. [2023-08-29 23:40:54,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:54,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2654 transitions. [2023-08-29 23:40:54,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 189.57142857142858) internal successors, (2654), 14 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:54,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:54,328 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:54,329 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 217 flow. Second operand 14 states and 2654 transitions. [2023-08-29 23:40:54,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 196 transitions, 946 flow [2023-08-29 23:40:54,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 196 transitions, 945 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:54,333 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 404 flow [2023-08-29 23:40:54,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=404, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-08-29 23:40:54,334 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2023-08-29 23:40:54,334 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 404 flow [2023-08-29 23:40:54,335 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) [2023-08-29 23:40:54,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:54,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:40:54,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-29 23:40:54,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:54,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:54,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1597108108, now seen corresponding path program 1 times [2023-08-29 23:40:54,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:54,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574808235] [2023-08-29 23:40:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:54,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:54,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:54,546 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:54,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:40:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:54,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:40:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:54,626 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:40:54,626 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 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-29 23:40:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:54,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:54,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574808235] [2023-08-29 23:40:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574808235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:54,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:54,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:54,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485597117] [2023-08-29 23:40:54,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:54,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:54,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 423 [2023-08-29 23:40:54,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:54,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:54,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 423 [2023-08-29 23:40:54,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:55,304 INFO L130 PetriNetUnfolder]: 5197/7435 cut-off events. [2023-08-29 23:40:55,304 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-08-29 23:40:55,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14953 conditions, 7435 events. 5197/7435 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35952 event pairs, 4162 based on Foata normal form. 0/3801 useless extension candidates. Maximal degree in co-relation 14929. Up to 6985 conditions per place. [2023-08-29 23:40:55,339 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 69 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-29 23:40:55,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 582 flow [2023-08-29 23:40:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-29 23:40:55,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46335697399527187 [2023-08-29 23:40:55,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-29 23:40:55,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-29 23:40:55,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:55,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-29 23:40:55,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:55,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:55,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:55,347 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 404 flow. Second operand 3 states and 588 transitions. [2023-08-29 23:40:55,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 582 flow [2023-08-29 23:40:55,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 560 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:55,351 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 418 flow [2023-08-29 23:40:55,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2023-08-29 23:40:55,352 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2023-08-29 23:40:55,352 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 418 flow [2023-08-29 23:40:55,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:55,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:55,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:55,367 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 (9)] Ended with exit code 0 [2023-08-29 23:40:55,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:55,562 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:55,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2035852269, now seen corresponding path program 1 times [2023-08-29 23:40:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393436600] [2023-08-29 23:40:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:55,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:55,564 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:55,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:40:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:40:55,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:55,639 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:40:55,643 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:40:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:55,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:40:55,677 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:40:55,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:40:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:55,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:55,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:55,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393436600] [2023-08-29 23:40:55,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393436600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:55,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:55,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:40:55,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291608571] [2023-08-29 23:40:55,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:55,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:40:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:40:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:40:55,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 423 [2023-08-29 23:40:55,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 418 flow. Second operand has 4 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:55,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:55,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 423 [2023-08-29 23:40:55,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:56,266 INFO L130 PetriNetUnfolder]: 2924/4430 cut-off events. [2023-08-29 23:40:56,266 INFO L131 PetriNetUnfolder]: For 1257/1257 co-relation queries the response was YES. [2023-08-29 23:40:56,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9417 conditions, 4430 events. 2924/4430 cut-off events. For 1257/1257 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21189 event pairs, 2094 based on Foata normal form. 12/2647 useless extension candidates. Maximal degree in co-relation 9390. Up to 3717 conditions per place. [2023-08-29 23:40:56,287 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 72 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2023-08-29 23:40:56,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 100 transitions, 618 flow [2023-08-29 23:40:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:40:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:40:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-08-29 23:40:56,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44739952718676124 [2023-08-29 23:40:56,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-08-29 23:40:56,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-08-29 23:40:56,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:56,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-08-29 23:40:56,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:56,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:56,295 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:56,295 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 418 flow. Second operand 4 states and 757 transitions. [2023-08-29 23:40:56,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 100 transitions, 618 flow [2023-08-29 23:40:56,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 100 transitions, 608 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:56,300 INFO L231 Difference]: Finished difference. Result has 92 places, 83 transitions, 426 flow [2023-08-29 23:40:56,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=92, PETRI_TRANSITIONS=83} [2023-08-29 23:40:56,301 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-29 23:40:56,301 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 83 transitions, 426 flow [2023-08-29 23:40:56,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:56,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:56,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:56,309 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 (10)] Ended with exit code 0 [2023-08-29 23:40:56,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:56,505 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:56,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash -199267608, now seen corresponding path program 1 times [2023-08-29 23:40:56,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:56,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292408903] [2023-08-29 23:40:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:56,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:56,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:56,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:56,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:40:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:40:56,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:56,609 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:40:56,609 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:40:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:56,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:56,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292408903] [2023-08-29 23:40:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292408903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:56,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:56,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:40:56,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567621328] [2023-08-29 23:40:56,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:40:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:40:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:40:56,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-29 23:40:56,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 83 transitions, 426 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:56,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:56,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-29 23:40:56,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:57,082 INFO L130 PetriNetUnfolder]: 1725/2749 cut-off events. [2023-08-29 23:40:57,082 INFO L131 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2023-08-29 23:40:57,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5752 conditions, 2749 events. 1725/2749 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12601 event pairs, 1191 based on Foata normal form. 0/1776 useless extension candidates. Maximal degree in co-relation 5726. Up to 2197 conditions per place. [2023-08-29 23:40:57,094 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 66 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2023-08-29 23:40:57,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 631 flow [2023-08-29 23:40:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:40:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:40:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 942 transitions. [2023-08-29 23:40:57,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453900709219858 [2023-08-29 23:40:57,099 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 942 transitions. [2023-08-29 23:40:57,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 942 transitions. [2023-08-29 23:40:57,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:57,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 942 transitions. [2023-08-29 23:40:57,102 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) [2023-08-29 23:40:57,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:57,106 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:57,106 INFO L175 Difference]: Start difference. First operand has 92 places, 83 transitions, 426 flow. Second operand 5 states and 942 transitions. [2023-08-29 23:40:57,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 631 flow [2023-08-29 23:40:57,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 101 transitions, 601 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:40:57,110 INFO L231 Difference]: Finished difference. Result has 94 places, 84 transitions, 447 flow [2023-08-29 23:40:57,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=94, PETRI_TRANSITIONS=84} [2023-08-29 23:40:57,111 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-08-29 23:40:57,111 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 84 transitions, 447 flow [2023-08-29 23:40:57,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:57,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:57,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:57,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:57,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:57,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:57,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:57,321 INFO L85 PathProgramCache]: Analyzing trace with hash -199267607, now seen corresponding path program 1 times [2023-08-29 23:40:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:57,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861526290] [2023-08-29 23:40:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:57,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:57,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:57,323 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:57,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:40:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:40:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:57,457 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-29 23:40:57,457 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 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-29 23:40:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:57,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:57,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:57,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861526290] [2023-08-29 23:40:57,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861526290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:57,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:57,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:40:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993679438] [2023-08-29 23:40:57,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:40:57,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:40:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:40:57,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 423 [2023-08-29 23:40:57,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 84 transitions, 447 flow. Second operand has 5 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:57,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:57,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 423 [2023-08-29 23:40:57,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:58,442 INFO L130 PetriNetUnfolder]: 1922/3022 cut-off events. [2023-08-29 23:40:58,442 INFO L131 PetriNetUnfolder]: For 1881/1881 co-relation queries the response was YES. [2023-08-29 23:40:58,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7114 conditions, 3022 events. 1922/3022 cut-off events. For 1881/1881 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13687 event pairs, 1232 based on Foata normal form. 0/2220 useless extension candidates. Maximal degree in co-relation 7084. Up to 2569 conditions per place. [2023-08-29 23:40:58,456 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 64 selfloop transitions, 27 changer transitions 0/104 dead transitions. [2023-08-29 23:40:58,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 747 flow [2023-08-29 23:40:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:40:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:40:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 929 transitions. [2023-08-29 23:40:58,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392434988179669 [2023-08-29 23:40:58,459 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 929 transitions. [2023-08-29 23:40:58,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 929 transitions. [2023-08-29 23:40:58,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:58,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 929 transitions. [2023-08-29 23:40:58,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:58,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:58,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:58,465 INFO L175 Difference]: Start difference. First operand has 94 places, 84 transitions, 447 flow. Second operand 5 states and 929 transitions. [2023-08-29 23:40:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 747 flow [2023-08-29 23:40:58,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 737 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:58,471 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 624 flow [2023-08-29 23:40:58,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=624, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2023-08-29 23:40:58,472 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2023-08-29 23:40:58,472 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 624 flow [2023-08-29 23:40:58,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:58,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:58,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:58,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:58,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:58,683 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:58,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1884640591, now seen corresponding path program 1 times [2023-08-29 23:40:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:58,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147217976] [2023-08-29 23:40:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:58,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:58,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:58,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:58,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:40:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:40:58,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:58,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:58,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:58,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147217976] [2023-08-29 23:40:58,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147217976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:58,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:58,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:40:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848362181] [2023-08-29 23:40:58,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:58,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:40:58,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:40:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:40:58,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-29 23:40:58,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 624 flow. Second operand has 5 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:58,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:58,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-29 23:40:58,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:59,551 INFO L130 PetriNetUnfolder]: 2922/4571 cut-off events. [2023-08-29 23:40:59,552 INFO L131 PetriNetUnfolder]: For 1891/1891 co-relation queries the response was YES. [2023-08-29 23:40:59,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10616 conditions, 4571 events. 2922/4571 cut-off events. For 1891/1891 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23555 event pairs, 1651 based on Foata normal form. 270/3730 useless extension candidates. Maximal degree in co-relation 10583. Up to 2576 conditions per place. [2023-08-29 23:40:59,575 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 120 selfloop transitions, 5 changer transitions 0/161 dead transitions. [2023-08-29 23:40:59,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 161 transitions, 1079 flow [2023-08-29 23:40:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:40:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:40:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1004 transitions. [2023-08-29 23:40:59,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47470449172576834 [2023-08-29 23:40:59,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1004 transitions. [2023-08-29 23:40:59,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1004 transitions. [2023-08-29 23:40:59,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:59,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1004 transitions. [2023-08-29 23:40:59,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:59,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:59,584 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:59,584 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 624 flow. Second operand 5 states and 1004 transitions. [2023-08-29 23:40:59,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 161 transitions, 1079 flow [2023-08-29 23:40:59,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 161 transitions, 1050 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:59,593 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 649 flow [2023-08-29 23:40:59,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-08-29 23:40:59,594 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 29 predicate places. [2023-08-29 23:40:59,594 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 649 flow [2023-08-29 23:40:59,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:59,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:59,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:59,605 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 (13)] Ended with exit code 0 [2023-08-29 23:40:59,808 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 [2023-08-29 23:40:59,809 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:40:59,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:59,809 INFO L85 PathProgramCache]: Analyzing trace with hash -845058126, now seen corresponding path program 1 times [2023-08-29 23:40:59,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:59,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402024143] [2023-08-29 23:40:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:59,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:59,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:59,811 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) [2023-08-29 23:40:59,811 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 [2023-08-29 23:40:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:59,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:40:59,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:59,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:59,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:59,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402024143] [2023-08-29 23:40:59,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402024143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:59,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:59,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:40:59,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558722725] [2023-08-29 23:40:59,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:59,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:40:59,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:59,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:40:59,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:41:00,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-29 23:41:00,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:00,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:00,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-29 23:41:00,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:00,579 INFO L130 PetriNetUnfolder]: 2132/3531 cut-off events. [2023-08-29 23:41:00,579 INFO L131 PetriNetUnfolder]: For 2888/2892 co-relation queries the response was YES. [2023-08-29 23:41:00,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8963 conditions, 3531 events. 2132/3531 cut-off events. For 2888/2892 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18057 event pairs, 1385 based on Foata normal form. 0/2805 useless extension candidates. Maximal degree in co-relation 8927. Up to 2578 conditions per place. [2023-08-29 23:41:00,596 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 92 selfloop transitions, 4 changer transitions 0/132 dead transitions. [2023-08-29 23:41:00,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 946 flow [2023-08-29 23:41:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:41:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:41:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 978 transitions. [2023-08-29 23:41:00,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624113475177305 [2023-08-29 23:41:00,599 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 978 transitions. [2023-08-29 23:41:00,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 978 transitions. [2023-08-29 23:41:00,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:00,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 978 transitions. [2023-08-29 23:41:00,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:00,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:00,605 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:00,605 INFO L175 Difference]: Start difference. First operand has 103 places, 99 transitions, 649 flow. Second operand 5 states and 978 transitions. [2023-08-29 23:41:00,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 946 flow [2023-08-29 23:41:00,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 132 transitions, 938 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 23:41:00,617 INFO L231 Difference]: Finished difference. Result has 108 places, 100 transitions, 664 flow [2023-08-29 23:41:00,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=664, PETRI_PLACES=108, PETRI_TRANSITIONS=100} [2023-08-29 23:41:00,617 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 34 predicate places. [2023-08-29 23:41:00,618 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 100 transitions, 664 flow [2023-08-29 23:41:00,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:00,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:00,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:00,629 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 [2023-08-29 23:41:00,827 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 [2023-08-29 23:41:00,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:00,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:00,827 INFO L85 PathProgramCache]: Analyzing trace with hash -426998886, now seen corresponding path program 1 times [2023-08-29 23:41:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:00,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096570062] [2023-08-29 23:41:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:00,830 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) [2023-08-29 23:41:00,830 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 [2023-08-29 23:41:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:00,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:41:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:00,906 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:41:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:00,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:00,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096570062] [2023-08-29 23:41:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096570062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:00,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:00,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:41:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071970581] [2023-08-29 23:41:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:00,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:41:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:41:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:41:01,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-29 23:41:01,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 100 transitions, 664 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:01,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-29 23:41:01,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:01,387 INFO L130 PetriNetUnfolder]: 2036/3313 cut-off events. [2023-08-29 23:41:01,387 INFO L131 PetriNetUnfolder]: For 3020/3028 co-relation queries the response was YES. [2023-08-29 23:41:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 3313 events. 2036/3313 cut-off events. For 3020/3028 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16347 event pairs, 1391 based on Foata normal form. 60/2983 useless extension candidates. Maximal degree in co-relation 8999. Up to 2483 conditions per place. [2023-08-29 23:41:01,403 INFO L137 encePairwiseOnDemand]: 419/423 looper letters, 70 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2023-08-29 23:41:01,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 871 flow [2023-08-29 23:41:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:41:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:41:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-08-29 23:41:01,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728132387706856 [2023-08-29 23:41:01,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-08-29 23:41:01,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-08-29 23:41:01,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:01,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-08-29 23:41:01,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,408 INFO L175 Difference]: Start difference. First operand has 108 places, 100 transitions, 664 flow. Second operand 3 states and 600 transitions. [2023-08-29 23:41:01,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 871 flow [2023-08-29 23:41:01,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 866 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:01,420 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 669 flow [2023-08-29 23:41:01,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=669, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2023-08-29 23:41:01,421 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2023-08-29 23:41:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 669 flow [2023-08-29 23:41:01,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:01,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:01,428 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 [2023-08-29 23:41:01,624 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 [2023-08-29 23:41:01,625 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:01,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash 154690031, now seen corresponding path program 1 times [2023-08-29 23:41:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:01,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818420237] [2023-08-29 23:41:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:01,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:01,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:01,626 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) [2023-08-29 23:41:01,627 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 [2023-08-29 23:41:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:41:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:01,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:01,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818420237] [2023-08-29 23:41:01,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818420237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:01,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:01,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:41:01,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736203765] [2023-08-29 23:41:01,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:01,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:41:01,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:01,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:41:01,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:41:02,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-29 23:41:02,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 669 flow. Second operand has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:02,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:02,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-29 23:41:02,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:03,274 INFO L130 PetriNetUnfolder]: 3065/4802 cut-off events. [2023-08-29 23:41:03,274 INFO L131 PetriNetUnfolder]: For 4359/4359 co-relation queries the response was YES. [2023-08-29 23:41:03,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12767 conditions, 4802 events. 3065/4802 cut-off events. For 4359/4359 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 25380 event pairs, 1355 based on Foata normal form. 254/4425 useless extension candidates. Maximal degree in co-relation 12729. Up to 1885 conditions per place. [2023-08-29 23:41:03,298 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 187 selfloop transitions, 15 changer transitions 0/237 dead transitions. [2023-08-29 23:41:03,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 237 transitions, 1591 flow [2023-08-29 23:41:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:41:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:41:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2131 transitions. [2023-08-29 23:41:03,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579840962819686 [2023-08-29 23:41:03,305 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2131 transitions. [2023-08-29 23:41:03,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2131 transitions. [2023-08-29 23:41:03,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:03,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2131 transitions. [2023-08-29 23:41:03,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 193.72727272727272) internal successors, (2131), 11 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:03,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:03,315 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:03,315 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 669 flow. Second operand 11 states and 2131 transitions. [2023-08-29 23:41:03,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 237 transitions, 1591 flow [2023-08-29 23:41:03,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 237 transitions, 1553 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:03,331 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 738 flow [2023-08-29 23:41:03,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=738, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2023-08-29 23:41:03,332 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 43 predicate places. [2023-08-29 23:41:03,332 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 738 flow [2023-08-29 23:41:03,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:03,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:03,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:03,341 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 (16)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:03,541 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 [2023-08-29 23:41:03,541 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:03,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1767495894, now seen corresponding path program 1 times [2023-08-29 23:41:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:03,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923639733] [2023-08-29 23:41:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:03,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:03,543 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) [2023-08-29 23:41:03,544 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 [2023-08-29 23:41:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:03,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:41:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:03,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:03,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:03,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923639733] [2023-08-29 23:41:03,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923639733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:03,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:03,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:41:03,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167640597] [2023-08-29 23:41:03,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:03,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:41:03,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:03,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:41:03,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:41:04,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-29 23:41:04,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 738 flow. Second operand has 10 states, 10 states have (on average 179.4) internal successors, (1794), 10 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:04,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:04,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-29 23:41:04,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:04,988 INFO L130 PetriNetUnfolder]: 2213/3792 cut-off events. [2023-08-29 23:41:04,989 INFO L131 PetriNetUnfolder]: For 5474/5474 co-relation queries the response was YES. [2023-08-29 23:41:05,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11052 conditions, 3792 events. 2213/3792 cut-off events. For 5474/5474 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20699 event pairs, 855 based on Foata normal form. 146/3552 useless extension candidates. Maximal degree in co-relation 11010. Up to 1241 conditions per place. [2023-08-29 23:41:05,019 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 130 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2023-08-29 23:41:05,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 179 transitions, 1295 flow [2023-08-29 23:41:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:41:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:41:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2086 transitions. [2023-08-29 23:41:05,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483129163980228 [2023-08-29 23:41:05,025 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2086 transitions. [2023-08-29 23:41:05,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2086 transitions. [2023-08-29 23:41:05,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:05,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2086 transitions. [2023-08-29 23:41:05,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 189.63636363636363) internal successors, (2086), 11 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,034 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,035 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 738 flow. Second operand 11 states and 2086 transitions. [2023-08-29 23:41:05,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 179 transitions, 1295 flow [2023-08-29 23:41:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 179 transitions, 1263 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-29 23:41:05,052 INFO L231 Difference]: Finished difference. Result has 127 places, 105 transitions, 778 flow [2023-08-29 23:41:05,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=778, PETRI_PLACES=127, PETRI_TRANSITIONS=105} [2023-08-29 23:41:05,053 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 53 predicate places. [2023-08-29 23:41:05,053 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 105 transitions, 778 flow [2023-08-29 23:41:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.4) internal successors, (1794), 10 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:05,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:05,063 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 [2023-08-29 23:41:05,262 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 [2023-08-29 23:41:05,263 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:05,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -426998887, now seen corresponding path program 1 times [2023-08-29 23:41:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:05,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082781798] [2023-08-29 23:41:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:05,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:05,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:05,265 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) [2023-08-29 23:41:05,267 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 [2023-08-29 23:41:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:05,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:41:05,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:05,357 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:41:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:05,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:05,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:05,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082781798] [2023-08-29 23:41:05,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082781798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:05,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:05,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:41:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952435059] [2023-08-29 23:41:05,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:05,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:41:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:41:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:41:05,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-29 23:41:05,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 105 transitions, 778 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:05,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-29 23:41:05,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:05,947 INFO L130 PetriNetUnfolder]: 2382/3857 cut-off events. [2023-08-29 23:41:05,947 INFO L131 PetriNetUnfolder]: For 6377/6383 co-relation queries the response was YES. [2023-08-29 23:41:05,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12789 conditions, 3857 events. 2382/3857 cut-off events. For 6377/6383 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19537 event pairs, 1626 based on Foata normal form. 78/3640 useless extension candidates. Maximal degree in co-relation 12744. Up to 2872 conditions per place. [2023-08-29 23:41:05,969 INFO L137 encePairwiseOnDemand]: 419/423 looper letters, 80 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-08-29 23:41:05,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 113 transitions, 1001 flow [2023-08-29 23:41:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:41:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:41:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-29 23:41:05,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45547675334909377 [2023-08-29 23:41:05,971 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-29 23:41:05,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-29 23:41:05,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:05,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-29 23:41:05,972 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) [2023-08-29 23:41:05,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,973 INFO L175 Difference]: Start difference. First operand has 127 places, 105 transitions, 778 flow. Second operand 3 states and 578 transitions. [2023-08-29 23:41:05,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 113 transitions, 1001 flow [2023-08-29 23:41:05,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 113 transitions, 984 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 23:41:05,986 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 765 flow [2023-08-29 23:41:05,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=765, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2023-08-29 23:41:05,986 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2023-08-29 23:41:05,986 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 765 flow [2023-08-29 23:41:05,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:05,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:05,995 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 [2023-08-29 23:41:06,194 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 [2023-08-29 23:41:06,194 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:06,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1335629355, now seen corresponding path program 2 times [2023-08-29 23:41:06,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:06,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059593085] [2023-08-29 23:41:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:41:06,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:06,196 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) [2023-08-29 23:41:06,197 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 [2023-08-29 23:41:06,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:41:06,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:41:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:41:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:06,363 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-29 23:41:06,364 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 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-29 23:41:06,419 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:41:06,420 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:41:06,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:41:06,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:41:06,624 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:41:06,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:41:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:41:06,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:06,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059593085] [2023-08-29 23:41:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059593085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:06,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:06,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:41:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464116485] [2023-08-29 23:41:06,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:06,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:41:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:41:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:41:07,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 423 [2023-08-29 23:41:07,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 765 flow. Second operand has 6 states, 6 states have (on average 169.5) internal successors, (1017), 6 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:07,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:07,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 423 [2023-08-29 23:41:07,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:08,559 INFO L130 PetriNetUnfolder]: 2726/4325 cut-off events. [2023-08-29 23:41:08,559 INFO L131 PetriNetUnfolder]: For 8611/8611 co-relation queries the response was YES. [2023-08-29 23:41:08,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14964 conditions, 4325 events. 2726/4325 cut-off events. For 8611/8611 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 22279 event pairs, 997 based on Foata normal form. 114/4035 useless extension candidates. Maximal degree in co-relation 14920. Up to 2285 conditions per place. [2023-08-29 23:41:08,577 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 128 selfloop transitions, 25 changer transitions 0/164 dead transitions. [2023-08-29 23:41:08,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 164 transitions, 1383 flow [2023-08-29 23:41:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:41:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:41:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1438 transitions. [2023-08-29 23:41:08,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42494089834515364 [2023-08-29 23:41:08,580 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1438 transitions. [2023-08-29 23:41:08,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1438 transitions. [2023-08-29 23:41:08,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:08,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1438 transitions. [2023-08-29 23:41:08,582 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) [2023-08-29 23:41:08,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:08,585 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:08,585 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 765 flow. Second operand 8 states and 1438 transitions. [2023-08-29 23:41:08,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 164 transitions, 1383 flow [2023-08-29 23:41:08,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 164 transitions, 1367 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:08,601 INFO L231 Difference]: Finished difference. Result has 130 places, 110 transitions, 893 flow [2023-08-29 23:41:08,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=130, PETRI_TRANSITIONS=110} [2023-08-29 23:41:08,602 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 56 predicate places. [2023-08-29 23:41:08,602 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 110 transitions, 893 flow [2023-08-29 23:41:08,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.5) internal successors, (1017), 6 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:08,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:08,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:08,611 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 (19)] Ended with exit code 0 [2023-08-29 23:41:08,811 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 [2023-08-29 23:41:08,812 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:08,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1335564999, now seen corresponding path program 1 times [2023-08-29 23:41:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80032724] [2023-08-29 23:41:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:08,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:08,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:08,813 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) [2023-08-29 23:41:08,815 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 [2023-08-29 23:41:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:41:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:08,963 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-29 23:41:08,964 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 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-29 23:41:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:41:09,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:41:09,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:09,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80032724] [2023-08-29 23:41:09,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80032724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:09,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:09,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:41:09,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286492013] [2023-08-29 23:41:09,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:09,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:41:09,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:09,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:41:09,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:41:11,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 423 [2023-08-29 23:41:11,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 110 transitions, 893 flow. Second operand has 10 states, 10 states have (on average 176.8) internal successors, (1768), 10 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:11,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:11,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 423 [2023-08-29 23:41:11,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:15,496 INFO L130 PetriNetUnfolder]: 3286/5383 cut-off events. [2023-08-29 23:41:15,496 INFO L131 PetriNetUnfolder]: For 13599/13599 co-relation queries the response was YES. [2023-08-29 23:41:15,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19340 conditions, 5383 events. 3286/5383 cut-off events. For 13599/13599 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 30169 event pairs, 962 based on Foata normal form. 52/4952 useless extension candidates. Maximal degree in co-relation 19293. Up to 3363 conditions per place. [2023-08-29 23:41:15,526 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 119 selfloop transitions, 84 changer transitions 0/214 dead transitions. [2023-08-29 23:41:15,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 214 transitions, 2055 flow [2023-08-29 23:41:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:41:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:41:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2386 transitions. [2023-08-29 23:41:15,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43389707219494456 [2023-08-29 23:41:15,531 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2386 transitions. [2023-08-29 23:41:15,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2386 transitions. [2023-08-29 23:41:15,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:15,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2386 transitions. [2023-08-29 23:41:15,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.53846153846155) internal successors, (2386), 13 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,538 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 423.0) internal successors, (5922), 14 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,539 INFO L175 Difference]: Start difference. First operand has 130 places, 110 transitions, 893 flow. Second operand 13 states and 2386 transitions. [2023-08-29 23:41:15,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 214 transitions, 2055 flow [2023-08-29 23:41:15,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 214 transitions, 1994 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-29 23:41:15,566 INFO L231 Difference]: Finished difference. Result has 144 places, 164 transitions, 1672 flow [2023-08-29 23:41:15,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1672, PETRI_PLACES=144, PETRI_TRANSITIONS=164} [2023-08-29 23:41:15,567 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 70 predicate places. [2023-08-29 23:41:15,567 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 164 transitions, 1672 flow [2023-08-29 23:41:15,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.8) internal successors, (1768), 10 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:15,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:15,583 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 [2023-08-29 23:41:15,777 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 [2023-08-29 23:41:15,777 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:15,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash -298295630, now seen corresponding path program 2 times [2023-08-29 23:41:15,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195896030] [2023-08-29 23:41:15,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:41:15,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:15,779 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) [2023-08-29 23:41:15,780 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 [2023-08-29 23:41:15,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:41:15,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:41:15,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-29 23:41:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:15,942 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-29 23:41:15,942 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 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-29 23:41:15,985 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:41:15,985 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:41:16,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:41:16,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:41:16,135 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:41:16,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:41:16,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:41:16,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:41:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:41:16,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:16,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:16,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195896030] [2023-08-29 23:41:16,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195896030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:16,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:16,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:41:16,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328217730] [2023-08-29 23:41:16,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:16,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:41:16,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:41:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:41:19,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 423 [2023-08-29 23:41:19,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 164 transitions, 1672 flow. Second operand has 7 states, 7 states have (on average 169.28571428571428) internal successors, (1185), 7 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:19,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:19,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 423 [2023-08-29 23:41:19,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:21,421 INFO L130 PetriNetUnfolder]: 4102/6860 cut-off events. [2023-08-29 23:41:21,422 INFO L131 PetriNetUnfolder]: For 24729/24729 co-relation queries the response was YES. [2023-08-29 23:41:21,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26272 conditions, 6860 events. 4102/6860 cut-off events. For 24729/24729 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 40591 event pairs, 996 based on Foata normal form. 0/6288 useless extension candidates. Maximal degree in co-relation 26220. Up to 3290 conditions per place. [2023-08-29 23:41:21,467 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 164 selfloop transitions, 68 changer transitions 0/243 dead transitions. [2023-08-29 23:41:21,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 243 transitions, 2652 flow [2023-08-29 23:41:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 23:41:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 23:41:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1792 transitions. [2023-08-29 23:41:21,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236406619385343 [2023-08-29 23:41:21,470 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1792 transitions. [2023-08-29 23:41:21,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1792 transitions. [2023-08-29 23:41:21,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:21,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1792 transitions. [2023-08-29 23:41:21,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 179.2) internal successors, (1792), 10 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:21,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:21,475 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:21,475 INFO L175 Difference]: Start difference. First operand has 144 places, 164 transitions, 1672 flow. Second operand 10 states and 1792 transitions. [2023-08-29 23:41:21,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 243 transitions, 2652 flow [2023-08-29 23:41:21,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 243 transitions, 2478 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-08-29 23:41:21,525 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1722 flow [2023-08-29 23:41:21,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1722, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2023-08-29 23:41:21,525 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 76 predicate places. [2023-08-29 23:41:21,526 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1722 flow [2023-08-29 23:41:21,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.28571428571428) internal successors, (1185), 7 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:21,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:21,526 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:41:21,532 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 (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:21,726 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 [2023-08-29 23:41:21,726 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:21,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1917800294, now seen corresponding path program 3 times [2023-08-29 23:41:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:21,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309926993] [2023-08-29 23:41:21,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:41:21,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:21,728 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) [2023-08-29 23:41:21,729 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 [2023-08-29 23:41:21,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:41:21,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:41:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:41:21,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:21,934 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:41:21,934 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:41:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:22,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:24,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:24,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309926993] [2023-08-29 23:41:24,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309926993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:24,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:41:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885394736] [2023-08-29 23:41:24,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:41:24,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:41:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:41:35,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-29 23:41:35,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1722 flow. Second operand has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:35,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:35,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-29 23:41:35,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:54,605 INFO L130 PetriNetUnfolder]: 4581/7605 cut-off events. [2023-08-29 23:41:54,605 INFO L131 PetriNetUnfolder]: For 35936/35936 co-relation queries the response was YES. [2023-08-29 23:41:54,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31596 conditions, 7605 events. 4581/7605 cut-off events. For 35936/35936 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 45517 event pairs, 2507 based on Foata normal form. 12/7071 useless extension candidates. Maximal degree in co-relation 31542. Up to 6003 conditions per place. [2023-08-29 23:41:54,660 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 449 selfloop transitions, 139 changer transitions 0/599 dead transitions. [2023-08-29 23:41:54,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 599 transitions, 6744 flow [2023-08-29 23:41:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-29 23:41:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-29 23:41:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4878 transitions. [2023-08-29 23:41:54,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44353518821603927 [2023-08-29 23:41:54,665 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4878 transitions. [2023-08-29 23:41:54,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4878 transitions. [2023-08-29 23:41:54,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:54,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4878 transitions. [2023-08-29 23:41:54,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 187.6153846153846) internal successors, (4878), 26 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 423.0) internal successors, (11421), 27 states have internal predecessors, (11421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,677 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 423.0) internal successors, (11421), 27 states have internal predecessors, (11421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,678 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1722 flow. Second operand 26 states and 4878 transitions. [2023-08-29 23:41:54,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 599 transitions, 6744 flow [2023-08-29 23:41:54,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 599 transitions, 6584 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:41:54,772 INFO L231 Difference]: Finished difference. Result has 185 places, 249 transitions, 3175 flow [2023-08-29 23:41:54,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3175, PETRI_PLACES=185, PETRI_TRANSITIONS=249} [2023-08-29 23:41:54,773 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 111 predicate places. [2023-08-29 23:41:54,773 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 249 transitions, 3175 flow [2023-08-29 23:41:54,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:54,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:54,783 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 (22)] Ended with exit code 0 [2023-08-29 23:41:54,979 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 [2023-08-29 23:41:54,979 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:41:54,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1539815385, now seen corresponding path program 1 times [2023-08-29 23:41:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:54,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785758306] [2023-08-29 23:41:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:54,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:54,981 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) [2023-08-29 23:41:54,982 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 [2023-08-29 23:41:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:41:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:55,197 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:41:55,198 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:41:55,274 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 13 treesize of output 9 [2023-08-29 23:41:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:55,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:55,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:55,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785758306] [2023-08-29 23:41:55,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785758306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:55,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:55,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 23:41:55,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055851087] [2023-08-29 23:41:55,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:55,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:41:55,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:41:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:41:57,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-08-29 23:41:57,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 249 transitions, 3175 flow. Second operand has 14 states, 14 states have (on average 172.64285714285714) internal successors, (2417), 14 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:57,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:57,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-08-29 23:41:57,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:42:00,584 INFO L130 PetriNetUnfolder]: 6449/10477 cut-off events. [2023-08-29 23:42:00,585 INFO L131 PetriNetUnfolder]: For 50146/50162 co-relation queries the response was YES. [2023-08-29 23:42:00,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43442 conditions, 10477 events. 6449/10477 cut-off events. For 50146/50162 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 65812 event pairs, 2133 based on Foata normal form. 550/10181 useless extension candidates. Maximal degree in co-relation 43374. Up to 3596 conditions per place. [2023-08-29 23:42:00,684 INFO L137 encePairwiseOnDemand]: 413/423 looper letters, 497 selfloop transitions, 45 changer transitions 0/553 dead transitions. [2023-08-29 23:42:00,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 553 transitions, 6752 flow [2023-08-29 23:42:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 23:42:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 23:42:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3497 transitions. [2023-08-29 23:42:00,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351126042055493 [2023-08-29 23:42:00,687 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3497 transitions. [2023-08-29 23:42:00,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3497 transitions. [2023-08-29 23:42:00,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:42:00,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3497 transitions. [2023-08-29 23:42:00,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 184.05263157894737) internal successors, (3497), 19 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:00,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 423.0) internal successors, (8460), 20 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:00,694 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 423.0) internal successors, (8460), 20 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:00,694 INFO L175 Difference]: Start difference. First operand has 185 places, 249 transitions, 3175 flow. Second operand 19 states and 3497 transitions. [2023-08-29 23:42:00,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 553 transitions, 6752 flow [2023-08-29 23:42:00,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 553 transitions, 6622 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-08-29 23:42:00,976 INFO L231 Difference]: Finished difference. Result has 197 places, 264 transitions, 3397 flow [2023-08-29 23:42:00,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3397, PETRI_PLACES=197, PETRI_TRANSITIONS=264} [2023-08-29 23:42:00,977 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 123 predicate places. [2023-08-29 23:42:00,977 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 264 transitions, 3397 flow [2023-08-29 23:42:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 172.64285714285714) internal successors, (2417), 14 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:00,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:42:00,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:42:00,986 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 (23)] Ended with exit code 0 [2023-08-29 23:42:01,180 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 [2023-08-29 23:42:01,181 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:42:01,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:42:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash 418829167, now seen corresponding path program 2 times [2023-08-29 23:42:01,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:42:01,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987364846] [2023-08-29 23:42:01,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:42:01,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:01,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:42:01,182 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) [2023-08-29 23:42:01,183 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 [2023-08-29 23:42:01,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:42:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:42:01,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 23:42:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:42:01,413 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-29 23:42:01,413 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 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-29 23:42:01,456 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:42:01,456 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:42:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:42:01,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:42:01,605 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:42:01,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:42:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 23:42:01,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:42:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 23:42:05,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:42:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987364846] [2023-08-29 23:42:05,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987364846] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:42:05,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:42:05,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 23:42:05,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550277392] [2023-08-29 23:42:05,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:42:05,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:42:05,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:42:05,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:42:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2023-08-29 23:42:08,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:11,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:14,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:16,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:19,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:22,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:24,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:26,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:29,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:31,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:34,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:37,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:38,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 423 [2023-08-29 23:42:38,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 264 transitions, 3397 flow. Second operand has 14 states, 14 states have (on average 147.71428571428572) internal successors, (2068), 14 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:38,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:42:38,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 423 [2023-08-29 23:42:38,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:42:55,789 INFO L130 PetriNetUnfolder]: 12205/19138 cut-off events. [2023-08-29 23:42:55,789 INFO L131 PetriNetUnfolder]: For 99226/99250 co-relation queries the response was YES. [2023-08-29 23:42:55,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85547 conditions, 19138 events. 12205/19138 cut-off events. For 99226/99250 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 121820 event pairs, 2312 based on Foata normal form. 1070/18754 useless extension candidates. Maximal degree in co-relation 85474. Up to 4179 conditions per place. [2023-08-29 23:42:55,937 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 636 selfloop transitions, 154 changer transitions 0/796 dead transitions. [2023-08-29 23:42:55,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 796 transitions, 9218 flow [2023-08-29 23:42:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-29 23:42:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-29 23:42:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4933 transitions. [2023-08-29 23:42:55,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761915656219019 [2023-08-29 23:42:55,944 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4933 transitions. [2023-08-29 23:42:55,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4933 transitions. [2023-08-29 23:42:55,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:42:55,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4933 transitions. [2023-08-29 23:42:55,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 159.1290322580645) internal successors, (4933), 31 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:55,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:55,960 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:55,960 INFO L175 Difference]: Start difference. First operand has 197 places, 264 transitions, 3397 flow. Second operand 31 states and 4933 transitions. [2023-08-29 23:42:55,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 796 transitions, 9218 flow [2023-08-29 23:42:56,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 796 transitions, 8896 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-29 23:42:56,355 INFO L231 Difference]: Finished difference. Result has 240 places, 372 transitions, 4866 flow [2023-08-29 23:42:56,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4866, PETRI_PLACES=240, PETRI_TRANSITIONS=372} [2023-08-29 23:42:56,355 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 166 predicate places. [2023-08-29 23:42:56,356 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 372 transitions, 4866 flow [2023-08-29 23:42:56,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 147.71428571428572) internal successors, (2068), 14 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:56,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:42:56,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:42:56,364 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 (24)] Ended with exit code 0 [2023-08-29 23:42:56,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:56,557 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:42:56,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:42:56,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1100735074, now seen corresponding path program 1 times [2023-08-29 23:42:56,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:42:56,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182404220] [2023-08-29 23:42:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:42:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:42:56,558 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:42:56,559 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 (25)] Waiting until timeout for monitored process [2023-08-29 23:42:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:42:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:42:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:42:56,733 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:42:56,733 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:42:56,804 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 13 treesize of output 9 [2023-08-29 23:42:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:56,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:42:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:57,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:42:57,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182404220] [2023-08-29 23:42:57,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182404220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:42:57,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:42:57,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 23:42:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393590323] [2023-08-29 23:42:57,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:42:57,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:42:57,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:42:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:42:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:42:59,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-08-29 23:42:59,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 372 transitions, 4866 flow. Second operand has 14 states, 14 states have (on average 172.71428571428572) internal successors, (2418), 14 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:59,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:42:59,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-08-29 23:42:59,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:43:04,110 INFO L130 PetriNetUnfolder]: 9941/16267 cut-off events. [2023-08-29 23:43:04,110 INFO L131 PetriNetUnfolder]: For 156950/156950 co-relation queries the response was YES. [2023-08-29 23:43:04,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79981 conditions, 16267 events. 9941/16267 cut-off events. For 156950/156950 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 106965 event pairs, 2960 based on Foata normal form. 192/15305 useless extension candidates. Maximal degree in co-relation 79891. Up to 6404 conditions per place. [2023-08-29 23:43:04,253 INFO L137 encePairwiseOnDemand]: 411/423 looper letters, 472 selfloop transitions, 23 changer transitions 0/506 dead transitions. [2023-08-29 23:43:04,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 506 transitions, 6811 flow [2023-08-29 23:43:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:43:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:43:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2733 transitions. [2023-08-29 23:43:04,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307328605200946 [2023-08-29 23:43:04,256 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2733 transitions. [2023-08-29 23:43:04,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2733 transitions. [2023-08-29 23:43:04,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:43:04,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2733 transitions. [2023-08-29 23:43:04,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 182.2) internal successors, (2733), 15 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:04,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 423.0) internal successors, (6768), 16 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:04,262 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 423.0) internal successors, (6768), 16 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:04,263 INFO L175 Difference]: Start difference. First operand has 240 places, 372 transitions, 4866 flow. Second operand 15 states and 2733 transitions. [2023-08-29 23:43:04,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 506 transitions, 6811 flow [2023-08-29 23:43:04,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 506 transitions, 6120 flow, removed 180 selfloop flow, removed 10 redundant places. [2023-08-29 23:43:04,902 INFO L231 Difference]: Finished difference. Result has 249 places, 378 transitions, 4412 flow [2023-08-29 23:43:04,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4412, PETRI_PLACES=249, PETRI_TRANSITIONS=378} [2023-08-29 23:43:04,902 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 175 predicate places. [2023-08-29 23:43:04,902 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 378 transitions, 4412 flow [2023-08-29 23:43:04,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 172.71428571428572) internal successors, (2418), 14 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:04,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:43:04,903 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:43:04,911 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 (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:43:05,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:05,105 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:43:05,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:43:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash 34086362, now seen corresponding path program 2 times [2023-08-29 23:43:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:43:05,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39797270] [2023-08-29 23:43:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:43:05,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:43:05,107 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:43:05,107 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 (26)] Waiting until timeout for monitored process [2023-08-29 23:43:05,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:43:05,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:43:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:43:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:43:05,279 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:43:05,279 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 23:43:05,323 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:43:05,324 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:43:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:43:05,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:43:05,443 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:43:05,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:43:05,478 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:43:05,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 23:43:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:05,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:43:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:08,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:43:08,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39797270] [2023-08-29 23:43:08,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39797270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:43:08,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:43:08,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-29 23:43:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622750510] [2023-08-29 23:43:08,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:43:08,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:43:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:43:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:43:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:43:11,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:14,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:16,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:20,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:23,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:25,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:29,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:31,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:34,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:36,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:39,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:42,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:44,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:47,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:49,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:51,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:54,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:56,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:59,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:01,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:04,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:06,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:09,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:12,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:14,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:16,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:18,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:21,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:24,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:27,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:30,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:32,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:34,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:37,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:40,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:42,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:45,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:47,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:50,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:53,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:53,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 423 [2023-08-29 23:44:53,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 378 transitions, 4412 flow. Second operand has 20 states, 20 states have (on average 132.4) internal successors, (2648), 20 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:44:53,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:44:53,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 423 [2023-08-29 23:44:53,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:45:06,039 INFO L130 PetriNetUnfolder]: 17670/27682 cut-off events. [2023-08-29 23:45:06,040 INFO L131 PetriNetUnfolder]: For 219377/219377 co-relation queries the response was YES. [2023-08-29 23:45:06,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128145 conditions, 27682 events. 17670/27682 cut-off events. For 219377/219377 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 182955 event pairs, 3467 based on Foata normal form. 0/26051 useless extension candidates. Maximal degree in co-relation 128054. Up to 8072 conditions per place. [2023-08-29 23:45:06,472 INFO L137 encePairwiseOnDemand]: 411/423 looper letters, 544 selfloop transitions, 220 changer transitions 0/769 dead transitions. [2023-08-29 23:45:06,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 769 transitions, 9093 flow [2023-08-29 23:45:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:45:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:45:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2676 transitions. [2023-08-29 23:45:06,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35145784081954295 [2023-08-29 23:45:06,477 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2676 transitions. [2023-08-29 23:45:06,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2676 transitions. [2023-08-29 23:45:06,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:45:06,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2676 transitions. [2023-08-29 23:45:06,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.66666666666666) internal successors, (2676), 18 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:06,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 423.0) internal successors, (8037), 19 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:06,486 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 423.0) internal successors, (8037), 19 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:06,486 INFO L175 Difference]: Start difference. First operand has 249 places, 378 transitions, 4412 flow. Second operand 18 states and 2676 transitions. [2023-08-29 23:45:06,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 769 transitions, 9093 flow [2023-08-29 23:45:07,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 769 transitions, 9052 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-29 23:45:07,765 INFO L231 Difference]: Finished difference. Result has 264 places, 430 transitions, 5527 flow [2023-08-29 23:45:07,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=4375, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5527, PETRI_PLACES=264, PETRI_TRANSITIONS=430} [2023-08-29 23:45:07,766 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 190 predicate places. [2023-08-29 23:45:07,767 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 430 transitions, 5527 flow [2023-08-29 23:45:07,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 132.4) internal successors, (2648), 20 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:07,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:45:07,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:45:07,778 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 (26)] Forceful destruction successful, exit code 0 [2023-08-29 23:45:07,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:45:07,979 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:45:07,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:45:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1602717814, now seen corresponding path program 3 times [2023-08-29 23:45:07,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:45:07,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408714830] [2023-08-29 23:45:07,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:45:07,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:45:07,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:45:07,981 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:45:07,984 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 (27)] Waiting until timeout for monitored process [2023-08-29 23:45:08,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:45:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:45:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:45:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:45:08,265 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:45:08,265 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:45:08,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-08-29 23:45:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:45:08,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:45:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:45:09,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:45:09,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408714830] [2023-08-29 23:45:09,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408714830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:45:09,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:45:09,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 23:45:09,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647452773] [2023-08-29 23:45:09,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:45:09,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:45:09,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:45:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:45:09,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:45:13,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-08-29 23:45:13,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 430 transitions, 5527 flow. Second operand has 18 states, 18 states have (on average 172.66666666666666) internal successors, (3108), 18 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:13,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:45:13,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-08-29 23:45:13,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:45:23,432 INFO L130 PetriNetUnfolder]: 19928/32076 cut-off events. [2023-08-29 23:45:23,432 INFO L131 PetriNetUnfolder]: For 297057/297057 co-relation queries the response was YES. [2023-08-29 23:45:23,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152634 conditions, 32076 events. 19928/32076 cut-off events. For 297057/297057 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 229146 event pairs, 5206 based on Foata normal form. 1040/31465 useless extension candidates. Maximal degree in co-relation 152539. Up to 10876 conditions per place. [2023-08-29 23:45:24,075 INFO L137 encePairwiseOnDemand]: 411/423 looper letters, 717 selfloop transitions, 35 changer transitions 0/763 dead transitions. [2023-08-29 23:45:24,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 763 transitions, 9932 flow [2023-08-29 23:45:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:45:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:45:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3660 transitions. [2023-08-29 23:45:24,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326241134751773 [2023-08-29 23:45:24,080 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3660 transitions. [2023-08-29 23:45:24,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3660 transitions. [2023-08-29 23:45:24,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:45:24,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3660 transitions. [2023-08-29 23:45:24,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 183.0) internal successors, (3660), 20 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:24,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 423.0) internal successors, (8883), 21 states have internal predecessors, (8883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:24,094 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 423.0) internal successors, (8883), 21 states have internal predecessors, (8883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:24,094 INFO L175 Difference]: Start difference. First operand has 264 places, 430 transitions, 5527 flow. Second operand 20 states and 3660 transitions. [2023-08-29 23:45:24,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 763 transitions, 9932 flow [2023-08-29 23:45:25,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 763 transitions, 9644 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-29 23:45:25,350 INFO L231 Difference]: Finished difference. Result has 282 places, 437 transitions, 5451 flow [2023-08-29 23:45:25,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=5273, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5451, PETRI_PLACES=282, PETRI_TRANSITIONS=437} [2023-08-29 23:45:25,351 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 208 predicate places. [2023-08-29 23:45:25,351 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 437 transitions, 5451 flow [2023-08-29 23:45:25,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 172.66666666666666) internal successors, (3108), 18 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:25,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:45:25,351 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:45:25,359 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 (27)] Forceful destruction successful, exit code 0 [2023-08-29 23:45:25,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:45:25,552 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:45:25,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:45:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1029764239, now seen corresponding path program 2 times [2023-08-29 23:45:25,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:45:25,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363086608] [2023-08-29 23:45:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:45:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:45:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:45:25,554 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:45:25,555 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 (28)] Waiting until timeout for monitored process [2023-08-29 23:45:25,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:45:25,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:45:25,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:45:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:45:25,788 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:45:25,789 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:45:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:45:26,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:45:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:45:28,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:45:28,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363086608] [2023-08-29 23:45:28,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363086608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:45:28,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:45:28,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-08-29 23:45:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345680854] [2023-08-29 23:45:28,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:45:28,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:45:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:45:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:45:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:45:49,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 423 [2023-08-29 23:45:49,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 437 transitions, 5451 flow. Second operand has 25 states, 25 states have (on average 173.28) internal successors, (4332), 25 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:49,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:45:49,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 423 [2023-08-29 23:45:49,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:46:08,568 INFO L130 PetriNetUnfolder]: 17507/28087 cut-off events. [2023-08-29 23:46:08,568 INFO L131 PetriNetUnfolder]: For 226092/226108 co-relation queries the response was YES. [2023-08-29 23:46:08,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131699 conditions, 28087 events. 17507/28087 cut-off events. For 226092/226108 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 196776 event pairs, 8603 based on Foata normal form. 141/26616 useless extension candidates. Maximal degree in co-relation 131600. Up to 20258 conditions per place. [2023-08-29 23:46:08,993 INFO L137 encePairwiseOnDemand]: 413/423 looper letters, 574 selfloop transitions, 122 changer transitions 0/707 dead transitions. [2023-08-29 23:46:08,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 707 transitions, 9091 flow [2023-08-29 23:46:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 23:46:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 23:46:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6633 transitions. [2023-08-29 23:46:09,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42380678550891315 [2023-08-29 23:46:09,138 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6633 transitions. [2023-08-29 23:46:09,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6633 transitions. [2023-08-29 23:46:09,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:46:09,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6633 transitions. [2023-08-29 23:46:09,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 179.27027027027026) internal successors, (6633), 37 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:09,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 423.0) internal successors, (16074), 38 states have internal predecessors, (16074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:09,158 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 423.0) internal successors, (16074), 38 states have internal predecessors, (16074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:09,158 INFO L175 Difference]: Start difference. First operand has 282 places, 437 transitions, 5451 flow. Second operand 37 states and 6633 transitions. [2023-08-29 23:46:09,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 707 transitions, 9091 flow [2023-08-29 23:46:10,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 707 transitions, 8963 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-08-29 23:46:10,310 INFO L231 Difference]: Finished difference. Result has 322 places, 497 transitions, 6681 flow [2023-08-29 23:46:10,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6681, PETRI_PLACES=322, PETRI_TRANSITIONS=497} [2023-08-29 23:46:10,311 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 248 predicate places. [2023-08-29 23:46:10,311 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 497 transitions, 6681 flow [2023-08-29 23:46:10,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 173.28) internal successors, (4332), 25 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:10,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:10,312 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:46:10,322 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 (28)] Forceful destruction successful, exit code 0 [2023-08-29 23:46:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:10,520 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:46:10,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash 328526098, now seen corresponding path program 4 times [2023-08-29 23:46:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999029954] [2023-08-29 23:46:10,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:46:10,521 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 [2023-08-29 23:46:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:10,522 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:10,523 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 (29)] Waiting until timeout for monitored process [2023-08-29 23:46:10,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:46:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:46:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 23:46:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:10,774 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:46:10,774 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:46:10,830 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:46:10,831 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:46:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:11,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-08-29 23:46:11,106 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:46:11,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:46:11,176 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:46:11,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:46:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:11,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:46:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:15,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999029954] [2023-08-29 23:46:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999029954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:46:15,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:46:15,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:46:15,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865884950] [2023-08-29 23:46:15,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:46:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:46:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:46:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:46:19,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:22,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:46:25,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:29,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:32,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:35,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:39,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:43,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:46,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:46:49,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:52,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:55,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:46:58,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:01,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:47:04,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:07,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:10,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:12,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:15,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:18,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:21,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:47:24,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:27,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:31,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:33,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:47:37,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:40,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:43,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:47:46,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:50,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:53,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:47:56,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:47:59,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:02,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:48:05,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:05,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 423 [2023-08-29 23:48:05,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 497 transitions, 6681 flow. Second operand has 24 states, 24 states have (on average 129.41666666666666) internal successors, (3106), 24 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:05,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:48:05,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 423 [2023-08-29 23:48:05,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:48:32,333 WARN L222 SmtUtils]: Spent 26.08s on a formula simplification. DAG size of input: 89 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:48:58,042 WARN L222 SmtUtils]: Spent 25.37s on a formula simplification. DAG size of input: 89 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:48:59,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:49:29,568 WARN L222 SmtUtils]: Spent 26.18s on a formula simplification. DAG size of input: 101 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:50:01,287 WARN L222 SmtUtils]: Spent 27.02s on a formula simplification. DAG size of input: 101 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:50:04,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:06,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:13,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:15,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:17,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:22,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:25,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:27,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:29,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:31,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:35,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:37,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:39,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:41,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:43,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:45,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:46,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:50:55,209 WARN L222 SmtUtils]: Spent 8.80s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:50:58,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:00,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:02,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:04,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:06,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:08,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:10,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:12,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:14,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:16,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:18,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:30,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:41,537 WARN L222 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:51:44,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:46,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:49,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:51,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:53,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:56,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:51:58,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:00,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:02,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:04,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:06,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:08,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:29,405 WARN L222 SmtUtils]: Spent 8.58s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:52:32,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:34,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:36,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:39,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:41,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:43,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:45,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:48,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:50,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:52,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:54,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:56,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:52:58,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:00,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:03,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:05,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:08,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:10,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:12,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:15,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:17,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:19,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:29,518 WARN L222 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:53:43,971 WARN L222 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:53:52,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:53:57,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:54:01,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:54:03,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:54:08,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:54:10,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:54:16,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15