./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:17:19,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:17:19,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:17:19,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:17:19,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:17:19,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:17:19,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:17:19,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:17:19,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:17:19,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:17:19,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:17:19,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:17:19,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:17:19,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:17:19,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:17:19,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:17:19,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:17:19,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:17:19,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:17:19,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:17:19,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:17:19,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:17:19,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:17:19,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:17:19,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:17:19,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:17:19,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:17:19,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:17:19,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:17:19,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:17:19,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:17:19,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:17:19,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:17:19,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:17:19,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:17:19,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:17:19,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:17:19,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:17:19,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:17:19,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:17:19,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:17:19,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:17:19,975 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:17:19,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:17:19,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:17:19,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:17:19,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:17:19,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:17:19,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:17:19,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:17:19,977 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:17:19,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:17:19,978 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:17:19,978 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:17:19,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:17:19,979 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:17:19,980 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:17:19,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:17:19,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:17:19,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:17:19,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:17:19,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:17:19,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:17:19,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:17:19,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:17:19,981 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:17:19,981 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:17:19,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:17:19,981 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:17:19,981 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:17:20,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:17:20,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:17:20,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:17:20,242 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:17:20,242 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:17:20,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 07:17:21,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:17:21,405 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:17:21,406 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 07:17:21,410 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed80da7ad/8eab7b6bc77f458187f3facb19b6476f/FLAGaa9367de5 [2023-08-30 07:17:21,420 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed80da7ad/8eab7b6bc77f458187f3facb19b6476f [2023-08-30 07:17:21,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:17:21,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:17:21,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:17:21,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:17:21,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:17:21,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:17:21" (1/1) ... [2023-08-30 07:17:21,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a7246e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:21, skipping insertion in model container [2023-08-30 07:17:21,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:17:21" (1/1) ... [2023-08-30 07:17:21,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:17:21,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:17:21,612 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 07:17:21,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:17:21,624 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) [2023-08-30 07:17:21,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7595702b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:21, skipping insertion in model container [2023-08-30 07:17:21,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:17:21,625 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:17:21,626 INFO L158 Benchmark]: Toolchain (without parser) took 202.96ms. Allocated memory is still 77.6MB. Free memory was 56.1MB in the beginning and 46.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:17:21,627 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 56.6MB. Free memory was 34.6MB in the beginning and 34.6MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:17:21,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.58ms. Allocated memory is still 77.6MB. Free memory was 55.8MB in the beginning and 46.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:17:21,629 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 56.6MB. Free memory was 34.6MB in the beginning and 34.6MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.58ms. Allocated memory is still 77.6MB. Free memory was 55.8MB in the beginning and 46.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:17:23,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:17:23,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:17:23,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:17:23,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:17:23,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:17:23,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:17:23,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:17:23,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:17:23,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:17:23,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:17:23,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:17:23,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:17:23,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:17:23,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:17:23,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:17:23,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:17:23,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:17:23,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:17:23,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:17:23,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:17:23,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:17:23,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:17:23,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:17:23,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:17:23,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:17:23,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:17:23,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:17:23,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:17:23,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:17:23,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:17:23,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:17:23,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:17:23,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:17:23,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:17:23,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:17:23,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:17:23,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:17:23,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:17:23,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:17:23,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:17:23,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:17:23,117 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:17:23,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:17:23,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:17:23,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:17:23,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:17:23,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:17:23,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:17:23,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:17:23,121 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:17:23,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:17:23,122 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:17:23,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:17:23,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:17:23,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:17:23,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:17:23,123 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:17:23,123 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:17:23,123 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:17:23,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:17:23,124 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:17:23,124 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:17:23,124 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:17:23,124 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:17:23,124 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:17:23,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:17:23,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:17:23,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:17:23,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:17:23,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:17:23,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:17:23,126 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:17:23,126 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:17:23,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:17:23,126 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:17:23,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:17:23,127 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:17:23,127 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:17:23,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:17:23,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:17:23,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:17:23,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:17:23,418 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:17:23,418 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:17:23,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 07:17:24,399 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:17:24,574 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:17:24,575 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-30 07:17:24,579 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fbccfe4/3d029e1fc5df4c87a5e196d6e991a361/FLAG78e4019ff [2023-08-30 07:17:24,590 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fbccfe4/3d029e1fc5df4c87a5e196d6e991a361 [2023-08-30 07:17:24,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:17:24,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:17:24,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:17:24,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:17:24,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:17:24,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d178bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24, skipping insertion in model container [2023-08-30 07:17:24,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:17:24,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:17:24,769 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 07:17:24,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:17:24,794 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:17:24,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:17:24,820 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 07:17:24,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:17:24,831 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:17:24,854 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-08-30 07:17:24,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:17:24,863 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:17:24,864 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:17:24,868 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:17:24,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24 WrapperNode [2023-08-30 07:17:24,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:17:24,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:17:24,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:17:24,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:17:24,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,911 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 144 [2023-08-30 07:17:24,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:17:24,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:17:24,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:17:24,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:17:24,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:17:24,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:17:24,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:17:24,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:17:24,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (1/1) ... [2023-08-30 07:17:24,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:17:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:17:24,962 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) [2023-08-30 07:17:24,987 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 [2023-08-30 07:17:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:17:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:17:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:17:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:17:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:17:24,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:17:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:17:24,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:17:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:17:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:17:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:17:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:17:24,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:17:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:17:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:17:24,992 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:17:25,091 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:17:25,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:17:25,488 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:17:25,560 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:17:25,561 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:17:25,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:17:25 BoogieIcfgContainer [2023-08-30 07:17:25,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:17:25,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:17:25,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:17:25,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:17:25,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:17:24" (1/3) ... [2023-08-30 07:17:25,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1e427a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:17:25, skipping insertion in model container [2023-08-30 07:17:25,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:17:24" (2/3) ... [2023-08-30 07:17:25,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1e427a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:17:25, skipping insertion in model container [2023-08-30 07:17:25,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:17:25" (3/3) ... [2023-08-30 07:17:25,568 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-30 07:17:25,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:17:25,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 07:17:25,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:17:25,661 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:17:25,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2023-08-30 07:17:25,745 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2023-08-30 07:17:25,745 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:17:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 07:17:25,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2023-08-30 07:17:25,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-08-30 07:17:25,758 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:17:25,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-30 07:17:25,770 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-30 07:17:25,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-08-30 07:17:25,807 INFO L130 PetriNetUnfolder]: 11/138 cut-off events. [2023-08-30 07:17:25,807 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:17:25,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 07:17:25,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 1336 [2023-08-30 07:17:37,541 INFO L134 LiptonReduction]: Checked pairs total: 1708 [2023-08-30 07:17:37,542 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 07:17:37,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:17:37,554 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;@35649259, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:17:37,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-30 07:17:37,556 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:17:37,557 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:17:37,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:37,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:17:37,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:37,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash 20468, now seen corresponding path program 1 times [2023-08-30 07:17:37,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:37,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424088555] [2023-08-30 07:17:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:37,568 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 [2023-08-30 07:17:37,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:37,571 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) [2023-08-30 07:17:37,579 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 [2023-08-30 07:17:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:17:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:37,753 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:17:37,754 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 [2023-08-30 07:17:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:37,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:37,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:37,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424088555] [2023-08-30 07:17:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424088555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:37,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:37,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:37,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903222351] [2023-08-30 07:17:37,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:37,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:37,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 07:17:37,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:37,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:37,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 07:17:37,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:38,038 INFO L130 PetriNetUnfolder]: 306/469 cut-off events. [2023-08-30 07:17:38,039 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:17:38,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 469 events. 306/469 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 1986 event pairs, 174 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 772. Up to 465 conditions per place. [2023-08-30 07:17:38,042 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 29 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 07:17:38,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 134 flow [2023-08-30 07:17:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-30 07:17:38,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331140350877193 [2023-08-30 07:17:38,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-30 07:17:38,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-30 07:17:38,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:38,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-30 07:17:38,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,068 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 78 flow. Second operand 3 states and 395 transitions. [2023-08-30 07:17:38,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 134 flow [2023-08-30 07:17:38,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:17:38,071 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 68 flow [2023-08-30 07:17:38,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-30 07:17:38,075 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 07:17:38,075 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 68 flow [2023-08-30 07:17:38,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:38,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:17:38,087 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 [2023-08-30 07:17:38,276 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 [2023-08-30 07:17:38,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:38,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash 20513, now seen corresponding path program 1 times [2023-08-30 07:17:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699954185] [2023-08-30 07:17:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:38,278 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 [2023-08-30 07:17:38,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:38,279 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) [2023-08-30 07:17:38,281 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 [2023-08-30 07:17:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:17:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:17:38,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:17:38,369 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:17:38,370 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 [2023-08-30 07:17:38,380 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 [2023-08-30 07:17:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:38,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:38,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699954185] [2023-08-30 07:17:38,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699954185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:38,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:38,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090307357] [2023-08-30 07:17:38,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:38,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:38,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:38,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 07:17:38,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:38,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 07:17:38,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:38,599 INFO L130 PetriNetUnfolder]: 234/368 cut-off events. [2023-08-30 07:17:38,600 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:17:38,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 368 events. 234/368 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 1496 event pairs, 133 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 735. Up to 364 conditions per place. [2023-08-30 07:17:38,602 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 27 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 07:17:38,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 120 flow [2023-08-30 07:17:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-30 07:17:38,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309210526315789 [2023-08-30 07:17:38,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-30 07:17:38,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-30 07:17:38,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:38,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-30 07:17:38,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,611 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 68 flow. Second operand 3 states and 393 transitions. [2023-08-30 07:17:38,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 120 flow [2023-08-30 07:17:38,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:38,612 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 65 flow [2023-08-30 07:17:38,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-30 07:17:38,613 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-08-30 07:17:38,613 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 65 flow [2023-08-30 07:17:38,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:38,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:38,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:17:38,622 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 [2023-08-30 07:17:38,820 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 [2023-08-30 07:17:38,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:38,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash 20466, now seen corresponding path program 1 times [2023-08-30 07:17:38,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:38,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713627558] [2023-08-30 07:17:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:38,822 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 [2023-08-30 07:17:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:38,825 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) [2023-08-30 07:17:38,827 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 [2023-08-30 07:17:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:38,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:17:38,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:38,939 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:17:38,939 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 [2023-08-30 07:17:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:38,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:38,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:38,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713627558] [2023-08-30 07:17:38,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713627558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:38,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:38,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:38,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768196084] [2023-08-30 07:17:38,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:38,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:38,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:38,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:38,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:39,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 07:17:39,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:39,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 07:17:39,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:39,341 INFO L130 PetriNetUnfolder]: 467/734 cut-off events. [2023-08-30 07:17:39,342 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:17:39,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 734 events. 467/734 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3480 event pairs, 266 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 1468. Up to 365 conditions per place. [2023-08-30 07:17:39,345 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 52 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-30 07:17:39,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 229 flow [2023-08-30 07:17:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-30 07:17:39,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-30 07:17:39,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-30 07:17:39,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-30 07:17:39,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:39,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-30 07:17:39,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,350 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 65 flow. Second operand 3 states and 418 transitions. [2023-08-30 07:17:39,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 229 flow [2023-08-30 07:17:39,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:39,352 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 76 flow [2023-08-30 07:17:39,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-30 07:17:39,353 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-08-30 07:17:39,353 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 76 flow [2023-08-30 07:17:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:39,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:17:39,360 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 [2023-08-30 07:17:39,560 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 [2023-08-30 07:17:39,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:39,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash 20514, now seen corresponding path program 1 times [2023-08-30 07:17:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:39,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026128189] [2023-08-30 07:17:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:39,561 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 [2023-08-30 07:17:39,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:39,562 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) [2023-08-30 07:17:39,565 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 [2023-08-30 07:17:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:39,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:17:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:39,642 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 07:17:39,642 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 33 [2023-08-30 07:17:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:39,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:39,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:39,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026128189] [2023-08-30 07:17:39,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026128189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:39,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:39,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418516581] [2023-08-30 07:17:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:39,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:39,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-08-30 07:17:39,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:39,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-08-30 07:17:39,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:39,806 INFO L130 PetriNetUnfolder]: 323/532 cut-off events. [2023-08-30 07:17:39,807 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:17:39,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 532 events. 323/532 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 2439 event pairs, 184 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 1068. Up to 524 conditions per place. [2023-08-30 07:17:39,810 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 26 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 07:17:39,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 126 flow [2023-08-30 07:17:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-30 07:17:39,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41885964912280704 [2023-08-30 07:17:39,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-30 07:17:39,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-30 07:17:39,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:39,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-30 07:17:39,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,815 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 76 flow. Second operand 3 states and 382 transitions. [2023-08-30 07:17:39,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 126 flow [2023-08-30 07:17:39,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:39,816 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 72 flow [2023-08-30 07:17:39,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 07:17:39,817 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 07:17:39,817 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 72 flow [2023-08-30 07:17:39,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:39,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:39,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:17:39,827 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 [2023-08-30 07:17:40,024 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 [2023-08-30 07:17:40,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:40,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash 636405, now seen corresponding path program 1 times [2023-08-30 07:17:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162144955] [2023-08-30 07:17:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:40,026 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 [2023-08-30 07:17:40,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:40,027 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) [2023-08-30 07:17:40,029 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 [2023-08-30 07:17:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:17:40,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:40,126 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:17:40,126 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 [2023-08-30 07:17:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:40,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:40,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162144955] [2023-08-30 07:17:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162144955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:40,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:40,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:17:40,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556294250] [2023-08-30 07:17:40,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:17:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:17:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:17:40,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 304 [2023-08-30 07:17:40,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:40,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:40,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 304 [2023-08-30 07:17:40,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:41,082 INFO L130 PetriNetUnfolder]: 486/801 cut-off events. [2023-08-30 07:17:41,082 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:17:41,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 801 events. 486/801 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 3947 event pairs, 276 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 1609. Up to 263 conditions per place. [2023-08-30 07:17:41,085 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 71 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-30 07:17:41,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 79 transitions, 344 flow [2023-08-30 07:17:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:17:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:17:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2023-08-30 07:17:41,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42598684210526316 [2023-08-30 07:17:41,088 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2023-08-30 07:17:41,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2023-08-30 07:17:41,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:41,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2023-08-30 07:17:41,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,092 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 72 flow. Second operand 6 states and 777 transitions. [2023-08-30 07:17:41,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 79 transitions, 344 flow [2023-08-30 07:17:41,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 79 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:41,094 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 125 flow [2023-08-30 07:17:41,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-30 07:17:41,094 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 07:17:41,094 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 125 flow [2023-08-30 07:17:41,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:41,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:17:41,114 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 [2023-08-30 07:17:41,301 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 [2023-08-30 07:17:41,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:41,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:41,302 INFO L85 PathProgramCache]: Analyzing trace with hash 19729438, now seen corresponding path program 1 times [2023-08-30 07:17:41,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:41,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729451871] [2023-08-30 07:17:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:41,302 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 [2023-08-30 07:17:41,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:41,303 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) [2023-08-30 07:17:41,304 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 [2023-08-30 07:17:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:17:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:41,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:41,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729451871] [2023-08-30 07:17:41,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729451871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:41,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:41,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628973588] [2023-08-30 07:17:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:41,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-08-30 07:17:41,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:41,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-08-30 07:17:41,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:41,538 INFO L130 PetriNetUnfolder]: 450/861 cut-off events. [2023-08-30 07:17:41,538 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 07:17:41,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 861 events. 450/861 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5158 event pairs, 195 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1750. Up to 535 conditions per place. [2023-08-30 07:17:41,541 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 44 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-30 07:17:41,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 247 flow [2023-08-30 07:17:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-30 07:17:41,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-08-30 07:17:41,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-30 07:17:41,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-30 07:17:41,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:41,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-30 07:17:41,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,546 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 125 flow. Second operand 3 states and 412 transitions. [2023-08-30 07:17:41,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 247 flow [2023-08-30 07:17:41,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 237 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:41,548 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 131 flow [2023-08-30 07:17:41,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-30 07:17:41,551 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-30 07:17:41,551 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 131 flow [2023-08-30 07:17:41,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:41,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:17:41,561 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 [2023-08-30 07:17:41,758 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 [2023-08-30 07:17:41,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:41,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash 19729451, now seen corresponding path program 1 times [2023-08-30 07:17:41,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:41,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837259068] [2023-08-30 07:17:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:41,759 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 [2023-08-30 07:17:41,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:41,760 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) [2023-08-30 07:17:41,761 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 [2023-08-30 07:17:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:41,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:17:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:17:41,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:17:41,847 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:17:41,851 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 [2023-08-30 07:17:41,859 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 14 treesize of output 12 [2023-08-30 07:17:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:41,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:41,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:41,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837259068] [2023-08-30 07:17:41,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837259068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:41,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:41,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971436411] [2023-08-30 07:17:41,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:41,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:41,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:41,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 07:17:41,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:41,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:41,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 07:17:41,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:42,051 INFO L130 PetriNetUnfolder]: 411/780 cut-off events. [2023-08-30 07:17:42,051 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 07:17:42,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 780 events. 411/780 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4460 event pairs, 339 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 1767. Up to 774 conditions per place. [2023-08-30 07:17:42,054 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 30 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 07:17:42,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 189 flow [2023-08-30 07:17:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-30 07:17:42,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653508771929827 [2023-08-30 07:17:42,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-30 07:17:42,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-30 07:17:42,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:42,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-30 07:17:42,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,058 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 131 flow. Second operand 3 states and 389 transitions. [2023-08-30 07:17:42,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 189 flow [2023-08-30 07:17:42,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:42,059 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 127 flow [2023-08-30 07:17:42,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-30 07:17:42,059 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 07:17:42,060 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 127 flow [2023-08-30 07:17:42,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:42,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:17:42,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:42,269 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 [2023-08-30 07:17:42,269 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:42,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 19729449, now seen corresponding path program 1 times [2023-08-30 07:17:42,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:42,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310769659] [2023-08-30 07:17:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:42,271 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) [2023-08-30 07:17:42,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:17:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:17:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:42,344 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:17:42,344 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 [2023-08-30 07:17:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:42,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:42,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310769659] [2023-08-30 07:17:42,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310769659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:42,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:42,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:42,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590452911] [2023-08-30 07:17:42,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:42,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:42,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:42,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:42,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:42,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-08-30 07:17:42,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:42,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-08-30 07:17:42,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:42,496 INFO L130 PetriNetUnfolder]: 372/699 cut-off events. [2023-08-30 07:17:42,496 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-08-30 07:17:42,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 699 events. 372/699 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3850 event pairs, 303 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 1578. Up to 693 conditions per place. [2023-08-30 07:17:42,498 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 07:17:42,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 181 flow [2023-08-30 07:17:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-30 07:17:42,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-08-30 07:17:42,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-30 07:17:42,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-30 07:17:42,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:42,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-30 07:17:42,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,502 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 127 flow. Second operand 3 states and 378 transitions. [2023-08-30 07:17:42,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 181 flow [2023-08-30 07:17:42,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:42,503 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 124 flow [2023-08-30 07:17:42,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 07:17:42,504 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 07:17:42,504 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 124 flow [2023-08-30 07:17:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:42,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:42,504 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:17:42,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:42,713 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 [2023-08-30 07:17:42,713 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:42,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1781217458, now seen corresponding path program 2 times [2023-08-30 07:17:42,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:42,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202102067] [2023-08-30 07:17:42,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:17:42,714 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 [2023-08-30 07:17:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:42,715 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) [2023-08-30 07:17:42,717 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 [2023-08-30 07:17:42,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:17:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:17:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:17:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:42,829 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:17:42,829 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 [2023-08-30 07:17:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:42,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:43,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202102067] [2023-08-30 07:17:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202102067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:43,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:43,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:17:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808357851] [2023-08-30 07:17:43,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:17:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:17:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:17:45,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-08-30 07:17:45,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 124 flow. Second operand has 12 states, 12 states have (on average 118.0) internal successors, (1416), 12 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:45,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:45,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-08-30 07:17:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:47,611 INFO L130 PetriNetUnfolder]: 1232/2314 cut-off events. [2023-08-30 07:17:47,611 INFO L131 PetriNetUnfolder]: For 288/288 co-relation queries the response was YES. [2023-08-30 07:17:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 2314 events. 1232/2314 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14646 event pairs, 1010 based on Foata normal form. 6/1436 useless extension candidates. Maximal degree in co-relation 5203. Up to 521 conditions per place. [2023-08-30 07:17:47,618 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 202 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2023-08-30 07:17:47,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 215 transitions, 1104 flow [2023-08-30 07:17:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:17:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:17:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1614 transitions. [2023-08-30 07:17:47,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44243421052631576 [2023-08-30 07:17:47,623 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1614 transitions. [2023-08-30 07:17:47,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1614 transitions. [2023-08-30 07:17:47,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:47,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1614 transitions. [2023-08-30 07:17:47,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.5) internal successors, (1614), 12 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:47,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 304.0) internal successors, (3952), 13 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:47,629 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 304.0) internal successors, (3952), 13 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:47,629 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 124 flow. Second operand 12 states and 1614 transitions. [2023-08-30 07:17:47,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 215 transitions, 1104 flow [2023-08-30 07:17:47,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 215 transitions, 1103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:47,632 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 221 flow [2023-08-30 07:17:47,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=221, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-08-30 07:17:47,633 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-08-30 07:17:47,633 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 221 flow [2023-08-30 07:17:47,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 118.0) internal successors, (1416), 12 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:47,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:47,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:47,640 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 [2023-08-30 07:17:47,841 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 [2023-08-30 07:17:47,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:47,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash -650030388, now seen corresponding path program 1 times [2023-08-30 07:17:47,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:47,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824943106] [2023-08-30 07:17:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:47,842 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 [2023-08-30 07:17:47,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:47,843 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) [2023-08-30 07:17:47,869 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 [2023-08-30 07:17:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:17:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:47,922 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:17:47,923 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 [2023-08-30 07:17:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:47,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:47,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824943106] [2023-08-30 07:17:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824943106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:47,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:47,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:17:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722684700] [2023-08-30 07:17:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:17:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:17:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:17:48,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-08-30 07:17:48,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:48,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-08-30 07:17:48,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:48,175 INFO L130 PetriNetUnfolder]: 712/1394 cut-off events. [2023-08-30 07:17:48,175 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-30 07:17:48,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1394 events. 712/1394 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8240 event pairs, 550 based on Foata normal form. 0/994 useless extension candidates. Maximal degree in co-relation 3174. Up to 1361 conditions per place. [2023-08-30 07:17:48,180 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 28 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2023-08-30 07:17:48,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 34 transitions, 279 flow [2023-08-30 07:17:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:17:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:17:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-30 07:17:48,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029605263157895 [2023-08-30 07:17:48,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-30 07:17:48,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-30 07:17:48,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:48,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-30 07:17:48,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,186 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 221 flow. Second operand 4 states and 490 transitions. [2023-08-30 07:17:48,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 34 transitions, 279 flow [2023-08-30 07:17:48,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 254 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 07:17:48,189 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 198 flow [2023-08-30 07:17:48,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 07:17:48,189 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2023-08-30 07:17:48,190 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 198 flow [2023-08-30 07:17:48,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:48,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:48,197 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 [2023-08-30 07:17:48,390 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 [2023-08-30 07:17:48,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:48,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:48,391 INFO L85 PathProgramCache]: Analyzing trace with hash -650030387, now seen corresponding path program 1 times [2023-08-30 07:17:48,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:48,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946931058] [2023-08-30 07:17:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:48,392 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 [2023-08-30 07:17:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:48,392 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) [2023-08-30 07:17:48,393 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 [2023-08-30 07:17:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:48,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 07:17:48,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:48,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:48,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:48,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946931058] [2023-08-30 07:17:48,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946931058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:48,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:48,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:17:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108261439] [2023-08-30 07:17:48,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:48,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:48,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:48,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 304 [2023-08-30 07:17:48,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:48,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 304 [2023-08-30 07:17:48,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:48,641 INFO L130 PetriNetUnfolder]: 712/1374 cut-off events. [2023-08-30 07:17:48,641 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 07:17:48,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1374 events. 712/1374 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7370 event pairs, 370 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 3147. Up to 995 conditions per place. [2023-08-30 07:17:48,646 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-30 07:17:48,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 300 flow [2023-08-30 07:17:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-30 07:17:48,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2023-08-30 07:17:48,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-30 07:17:48,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-30 07:17:48,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:48,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-30 07:17:48,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,652 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 198 flow. Second operand 3 states and 402 transitions. [2023-08-30 07:17:48,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 300 flow [2023-08-30 07:17:48,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:17:48,654 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 200 flow [2023-08-30 07:17:48,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-08-30 07:17:48,655 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 07:17:48,655 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 200 flow [2023-08-30 07:17:48,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:48,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:48,664 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 [2023-08-30 07:17:48,862 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 [2023-08-30 07:17:48,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:48,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:48,863 INFO L85 PathProgramCache]: Analyzing trace with hash -650030386, now seen corresponding path program 1 times [2023-08-30 07:17:48,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:48,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514486461] [2023-08-30 07:17:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:48,864 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 [2023-08-30 07:17:48,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:48,864 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) [2023-08-30 07:17:48,866 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 [2023-08-30 07:17:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:17:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:48,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:48,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:48,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514486461] [2023-08-30 07:17:48,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514486461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:48,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:48,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:17:48,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994731718] [2023-08-30 07:17:48,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:48,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:17:48,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:17:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:17:48,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-08-30 07:17:48,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:48,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-08-30 07:17:48,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:49,185 INFO L130 PetriNetUnfolder]: 596/1178 cut-off events. [2023-08-30 07:17:49,185 INFO L131 PetriNetUnfolder]: For 384/422 co-relation queries the response was YES. [2023-08-30 07:17:49,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 1178 events. 596/1178 cut-off events. For 384/422 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6646 event pairs, 450 based on Foata normal form. 42/1020 useless extension candidates. Maximal degree in co-relation 2905. Up to 1130 conditions per place. [2023-08-30 07:17:49,189 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 41 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-08-30 07:17:49,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 319 flow [2023-08-30 07:17:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:17:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:17:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 517 transitions. [2023-08-30 07:17:49,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251644736842105 [2023-08-30 07:17:49,191 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 517 transitions. [2023-08-30 07:17:49,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 517 transitions. [2023-08-30 07:17:49,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:49,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 517 transitions. [2023-08-30 07:17:49,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:49,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:49,193 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:49,193 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 200 flow. Second operand 4 states and 517 transitions. [2023-08-30 07:17:49,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 319 flow [2023-08-30 07:17:49,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:17:49,196 INFO L231 Difference]: Finished difference. Result has 58 places, 35 transitions, 219 flow [2023-08-30 07:17:49,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=35} [2023-08-30 07:17:49,196 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-08-30 07:17:49,196 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 35 transitions, 219 flow [2023-08-30 07:17:49,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:49,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:49,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:49,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:49,407 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 [2023-08-30 07:17:49,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:49,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1975109973, now seen corresponding path program 1 times [2023-08-30 07:17:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:49,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632613574] [2023-08-30 07:17:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:49,408 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 [2023-08-30 07:17:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:49,409 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) [2023-08-30 07:17:49,409 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 [2023-08-30 07:17:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:17:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:49,529 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:17:49,529 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 [2023-08-30 07:17:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:49,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:50,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:50,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632613574] [2023-08-30 07:17:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632613574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:50,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:17:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063426070] [2023-08-30 07:17:50,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:17:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:17:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:17:53,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 304 [2023-08-30 07:17:53,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 35 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:53,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:53,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 304 [2023-08-30 07:17:53,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:55,904 INFO L130 PetriNetUnfolder]: 494/998 cut-off events. [2023-08-30 07:17:55,904 INFO L131 PetriNetUnfolder]: For 435/475 co-relation queries the response was YES. [2023-08-30 07:17:55,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 998 events. 494/998 cut-off events. For 435/475 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5561 event pairs, 366 based on Foata normal form. 94/1044 useless extension candidates. Maximal degree in co-relation 2569. Up to 745 conditions per place. [2023-08-30 07:17:55,908 INFO L137 encePairwiseOnDemand]: 297/304 looper letters, 59 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2023-08-30 07:17:55,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 472 flow [2023-08-30 07:17:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:17:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:17:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1187 transitions. [2023-08-30 07:17:55,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904605263157895 [2023-08-30 07:17:55,918 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1187 transitions. [2023-08-30 07:17:55,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1187 transitions. [2023-08-30 07:17:55,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:55,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1187 transitions. [2023-08-30 07:17:55,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:55,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:55,923 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:55,923 INFO L175 Difference]: Start difference. First operand has 58 places, 35 transitions, 219 flow. Second operand 10 states and 1187 transitions. [2023-08-30 07:17:55,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 472 flow [2023-08-30 07:17:55,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 462 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:17:55,926 INFO L231 Difference]: Finished difference. Result has 67 places, 36 transitions, 257 flow [2023-08-30 07:17:55,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=257, PETRI_PLACES=67, PETRI_TRANSITIONS=36} [2023-08-30 07:17:55,927 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2023-08-30 07:17:55,927 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 36 transitions, 257 flow [2023-08-30 07:17:55,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:55,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:55,927 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:55,936 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 (14)] Ended with exit code 0 [2023-08-30 07:17:56,134 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 [2023-08-30 07:17:56,134 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:56,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1699340814, now seen corresponding path program 2 times [2023-08-30 07:17:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012962280] [2023-08-30 07:17:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:17:56,135 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 [2023-08-30 07:17:56,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:56,136 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) [2023-08-30 07:17:56,136 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 [2023-08-30 07:17:56,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:17:56,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:17:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:17:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:56,266 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:17:56,266 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 [2023-08-30 07:17:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:17:56,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:56,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012962280] [2023-08-30 07:17:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012962280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:56,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:17:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933657548] [2023-08-30 07:17:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:56,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:17:56,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:17:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:17:56,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-08-30 07:17:56,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 36 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:56,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-08-30 07:17:56,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:56,591 INFO L130 PetriNetUnfolder]: 290/638 cut-off events. [2023-08-30 07:17:56,591 INFO L131 PetriNetUnfolder]: For 1071/1099 co-relation queries the response was YES. [2023-08-30 07:17:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 638 events. 290/638 cut-off events. For 1071/1099 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3325 event pairs, 198 based on Foata normal form. 160/798 useless extension candidates. Maximal degree in co-relation 1645. Up to 605 conditions per place. [2023-08-30 07:17:56,594 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 25 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2023-08-30 07:17:56,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 33 transitions, 297 flow [2023-08-30 07:17:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:17:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:17:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-30 07:17:56,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037828947368421 [2023-08-30 07:17:56,596 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-30 07:17:56,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-30 07:17:56,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:56,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-30 07:17:56,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,599 INFO L175 Difference]: Start difference. First operand has 67 places, 36 transitions, 257 flow. Second operand 4 states and 491 transitions. [2023-08-30 07:17:56,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 33 transitions, 297 flow [2023-08-30 07:17:56,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 33 transitions, 242 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-08-30 07:17:56,600 INFO L231 Difference]: Finished difference. Result has 55 places, 33 transitions, 192 flow [2023-08-30 07:17:56,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=33} [2023-08-30 07:17:56,601 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 07:17:56,601 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 33 transitions, 192 flow [2023-08-30 07:17:56,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:56,601 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:17:56,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:56,808 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 [2023-08-30 07:17:56,808 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:17:56,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2125848110, now seen corresponding path program 3 times [2023-08-30 07:17:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:56,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256520003] [2023-08-30 07:17:56,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:17:56,809 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 [2023-08-30 07:17:56,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:56,810 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) [2023-08-30 07:17:56,811 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 (16)] Waiting until timeout for monitored process [2023-08-30 07:17:56,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:17:56,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:17:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:17:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:57,000 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:17:57,001 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 [2023-08-30 07:17:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:57,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:59,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256520003] [2023-08-30 07:17:59,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256520003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:59,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:59,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:17:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117806716] [2023-08-30 07:17:59,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:17:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:17:59,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:18:07,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-08-30 07:18:07,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 33 transitions, 192 flow. Second operand has 24 states, 24 states have (on average 118.0) internal successors, (2832), 24 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:07,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:07,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-08-30 07:18:07,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:19,274 INFO L130 PetriNetUnfolder]: 662/1442 cut-off events. [2023-08-30 07:18:19,274 INFO L131 PetriNetUnfolder]: For 830/830 co-relation queries the response was YES. [2023-08-30 07:18:19,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 1442 events. 662/1442 cut-off events. For 830/830 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7999 event pairs, 450 based on Foata normal form. 12/1452 useless extension candidates. Maximal degree in co-relation 3566. Up to 337 conditions per place. [2023-08-30 07:18:19,279 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 307 selfloop transitions, 24 changer transitions 0/332 dead transitions. [2023-08-30 07:18:19,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 332 transitions, 1904 flow [2023-08-30 07:18:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:18:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:18:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3130 transitions. [2023-08-30 07:18:19,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290021929824561 [2023-08-30 07:18:19,287 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3130 transitions. [2023-08-30 07:18:19,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3130 transitions. [2023-08-30 07:18:19,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:19,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3130 transitions. [2023-08-30 07:18:19,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 130.41666666666666) internal successors, (3130), 24 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 304.0) internal successors, (7600), 25 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,326 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 304.0) internal successors, (7600), 25 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,326 INFO L175 Difference]: Start difference. First operand has 55 places, 33 transitions, 192 flow. Second operand 24 states and 3130 transitions. [2023-08-30 07:18:19,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 332 transitions, 1904 flow [2023-08-30 07:18:19,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 332 transitions, 1879 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:18:19,331 INFO L231 Difference]: Finished difference. Result has 89 places, 46 transitions, 371 flow [2023-08-30 07:18:19,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=371, PETRI_PLACES=89, PETRI_TRANSITIONS=46} [2023-08-30 07:18:19,332 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2023-08-30 07:18:19,332 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 46 transitions, 371 flow [2023-08-30 07:18:19,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 118.0) internal successors, (2832), 24 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:19,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:19,343 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 [2023-08-30 07:18:19,543 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 [2023-08-30 07:18:19,543 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:18:19,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1203095455, now seen corresponding path program 1 times [2023-08-30 07:18:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:19,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850989717] [2023-08-30 07:18:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:19,544 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 [2023-08-30 07:18:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:19,545 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) [2023-08-30 07:18:19,547 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 [2023-08-30 07:18:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:19,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:18:19,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:19,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:18:19,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:19,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850989717] [2023-08-30 07:18:19,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850989717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:18:19,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:18:19,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:18:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769091425] [2023-08-30 07:18:19,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:18:19,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:18:19,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:18:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:18:19,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 304 [2023-08-30 07:18:19,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 46 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:19,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 304 [2023-08-30 07:18:19,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:19,978 INFO L130 PetriNetUnfolder]: 998/2029 cut-off events. [2023-08-30 07:18:19,978 INFO L131 PetriNetUnfolder]: For 694/694 co-relation queries the response was YES. [2023-08-30 07:18:19,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5049 conditions, 2029 events. 998/2029 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11535 event pairs, 450 based on Foata normal form. 43/1986 useless extension candidates. Maximal degree in co-relation 5011. Up to 1271 conditions per place. [2023-08-30 07:18:19,985 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 46 selfloop transitions, 2 changer transitions 5/54 dead transitions. [2023-08-30 07:18:19,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 54 transitions, 499 flow [2023-08-30 07:18:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:18:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:18:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 07:18:19,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418859649122807 [2023-08-30 07:18:19,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 07:18:19,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 07:18:19,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:19,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 07:18:19,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,992 INFO L175 Difference]: Start difference. First operand has 89 places, 46 transitions, 371 flow. Second operand 3 states and 403 transitions. [2023-08-30 07:18:19,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 54 transitions, 499 flow [2023-08-30 07:18:19,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 54 transitions, 451 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 07:18:19,997 INFO L231 Difference]: Finished difference. Result has 82 places, 46 transitions, 329 flow [2023-08-30 07:18:19,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=82, PETRI_TRANSITIONS=46} [2023-08-30 07:18:19,998 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 45 predicate places. [2023-08-30 07:18:19,998 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 46 transitions, 329 flow [2023-08-30 07:18:19,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:19,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:19,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:20,009 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 [2023-08-30 07:18:20,208 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 [2023-08-30 07:18:20,208 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:18:20,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:20,209 INFO L85 PathProgramCache]: Analyzing trace with hash -540375072, now seen corresponding path program 1 times [2023-08-30 07:18:20,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:20,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586956278] [2023-08-30 07:18:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:20,209 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 [2023-08-30 07:18:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:20,216 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) [2023-08-30 07:18:20,217 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 [2023-08-30 07:18:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:18:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:20,417 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 7 treesize of output 5 [2023-08-30 07:18:20,427 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 [2023-08-30 07:18:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:20,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:18:20,646 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 166 treesize of output 162 [2023-08-30 07:18:20,747 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:18:20,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 258 treesize of output 166 [2023-08-30 07:18:20,754 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 92 treesize of output 88 [2023-08-30 07:18:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:22,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:22,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586956278] [2023-08-30 07:18:22,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586956278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:18:22,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:18:22,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:18:22,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096116439] [2023-08-30 07:18:22,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:18:22,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:18:22,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:18:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:18:23,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 304 [2023-08-30 07:18:23,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 46 transitions, 329 flow. Second operand has 10 states, 10 states have (on average 116.2) internal successors, (1162), 10 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:23,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:23,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 304 [2023-08-30 07:18:23,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:23,776 INFO L130 PetriNetUnfolder]: 1383/2687 cut-off events. [2023-08-30 07:18:23,776 INFO L131 PetriNetUnfolder]: For 649/649 co-relation queries the response was YES. [2023-08-30 07:18:23,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 2687 events. 1383/2687 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 14935 event pairs, 60 based on Foata normal form. 20/2707 useless extension candidates. Maximal degree in co-relation 6910. Up to 721 conditions per place. [2023-08-30 07:18:23,785 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 50 selfloop transitions, 5 changer transitions 16/71 dead transitions. [2023-08-30 07:18:23,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 536 flow [2023-08-30 07:18:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:18:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:18:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 723 transitions. [2023-08-30 07:18:23,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963815789473684 [2023-08-30 07:18:23,788 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 723 transitions. [2023-08-30 07:18:23,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 723 transitions. [2023-08-30 07:18:23,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:23,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 723 transitions. [2023-08-30 07:18:23,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:23,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:23,791 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:23,791 INFO L175 Difference]: Start difference. First operand has 82 places, 46 transitions, 329 flow. Second operand 6 states and 723 transitions. [2023-08-30 07:18:23,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 536 flow [2023-08-30 07:18:23,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 71 transitions, 532 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 07:18:23,798 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 347 flow [2023-08-30 07:18:23,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2023-08-30 07:18:23,798 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2023-08-30 07:18:23,798 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 347 flow [2023-08-30 07:18:23,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.2) internal successors, (1162), 10 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:23,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:23,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:23,808 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 [2023-08-30 07:18:24,006 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 [2023-08-30 07:18:24,006 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:18:24,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:24,006 INFO L85 PathProgramCache]: Analyzing trace with hash -702120888, now seen corresponding path program 2 times [2023-08-30 07:18:24,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684436353] [2023-08-30 07:18:24,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:18:24,006 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 [2023-08-30 07:18:24,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:24,007 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) [2023-08-30 07:18:24,019 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 [2023-08-30 07:18:24,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:18:24,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:18:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:18:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:24,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 07:18:24,278 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 [2023-08-30 07:18:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:24,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:18:24,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:18:24,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 188 [2023-08-30 07:18:24,696 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 188 treesize of output 184 [2023-08-30 07:18:24,703 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 184 treesize of output 180 [2023-08-30 07:18:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:25,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:25,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684436353] [2023-08-30 07:18:25,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684436353] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:18:25,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:18:25,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2023-08-30 07:18:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724589428] [2023-08-30 07:18:25,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:18:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 07:18:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 07:18:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-08-30 07:18:25,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 304 [2023-08-30 07:18:25,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 347 flow. Second operand has 13 states, 13 states have (on average 114.23076923076923) internal successors, (1485), 13 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:25,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:25,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 304 [2023-08-30 07:18:25,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:26,666 INFO L130 PetriNetUnfolder]: 2719/5282 cut-off events. [2023-08-30 07:18:26,666 INFO L131 PetriNetUnfolder]: For 3555/3555 co-relation queries the response was YES. [2023-08-30 07:18:26,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 5282 events. 2719/5282 cut-off events. For 3555/3555 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 34372 event pairs, 820 based on Foata normal form. 168/5450 useless extension candidates. Maximal degree in co-relation 13838. Up to 2015 conditions per place. [2023-08-30 07:18:26,679 INFO L137 encePairwiseOnDemand]: 298/304 looper letters, 56 selfloop transitions, 9 changer transitions 29/94 dead transitions. [2023-08-30 07:18:26,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 94 transitions, 688 flow [2023-08-30 07:18:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:18:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:18:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1189 transitions. [2023-08-30 07:18:26,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39111842105263156 [2023-08-30 07:18:26,683 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1189 transitions. [2023-08-30 07:18:26,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1189 transitions. [2023-08-30 07:18:26,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:26,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1189 transitions. [2023-08-30 07:18:26,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.9) internal successors, (1189), 10 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,687 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,687 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 347 flow. Second operand 10 states and 1189 transitions. [2023-08-30 07:18:26,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 94 transitions, 688 flow [2023-08-30 07:18:26,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 670 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 07:18:26,699 INFO L231 Difference]: Finished difference. Result has 94 places, 51 transitions, 409 flow [2023-08-30 07:18:26,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=51} [2023-08-30 07:18:26,700 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 57 predicate places. [2023-08-30 07:18:26,700 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 51 transitions, 409 flow [2023-08-30 07:18:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.23076923076923) internal successors, (1485), 13 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:26,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:26,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:26,907 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 [2023-08-30 07:18:26,907 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:18:26,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1517803675, now seen corresponding path program 3 times [2023-08-30 07:18:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:26,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395039189] [2023-08-30 07:18:26,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:18:26,908 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 [2023-08-30 07:18:26,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:26,909 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) [2023-08-30 07:18:26,912 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 [2023-08-30 07:18:27,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:18:27,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:18:27,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:18:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:27,350 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 7 treesize of output 5 [2023-08-30 07:18:27,361 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 20 treesize of output 16 [2023-08-30 07:18:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:18:27,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:18:37,527 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-08-30 07:18:37,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 676 treesize of output 532 [2023-08-30 07:18:37,555 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 285 treesize of output 277 [2023-08-30 07:18:37,580 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 277 treesize of output 269 [2023-08-30 07:20:27,897 WARN L222 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 3398 DAG size of output: 3399 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 07:22:08,461 WARN L222 SmtUtils]: Spent 23.84s on a formula simplification. DAG size of input: 5649 DAG size of output: 5808 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 07:25:25,410 WARN L222 SmtUtils]: Spent 57.74s on a formula simplification. DAG size of input: 9973 DAG size of output: 9976 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 07:25:42,894 WARN L222 SmtUtils]: Spent 11.89s on a formula simplification. DAG size of input: 9439 DAG size of output: 9439 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15