./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:23:02,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:23:02,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:23:02,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:23:02,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:23:02,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:23:02,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:23:02,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:23:02,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:23:02,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:23:02,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:23:02,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:23:02,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:23:02,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:23:02,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:23:02,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:23:02,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:23:02,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:23:02,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:23:02,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:23:02,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:23:02,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:23:02,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:23:02,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:23:02,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:23:02,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:23:02,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:23:02,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:23:02,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:23:02,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:23:02,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:23:02,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:23:02,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:23:02,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:23:02,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:23:02,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:23:02,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:23:02,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:23:02,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:23:02,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:23:02,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:23:02,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:23:03,012 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:23:03,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:23:03,013 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:23:03,013 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:23:03,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:23:03,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:23:03,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:23:03,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:23:03,015 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:23:03,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:23:03,015 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:23:03,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:23:03,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:23:03,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:23:03,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:23:03,016 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:23:03,016 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:23:03,016 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:23:03,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:23:03,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:23:03,017 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:23:03,017 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:23:03,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:23:03,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:23:03,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:23:03,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:03,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:23:03,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:23:03,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:23:03,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:23:03,018 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:23:03,019 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:23:03,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:23:03,019 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:23:03,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:23:03,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:23:03,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:23:03,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:23:03,275 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:23:03,275 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:23:03,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-30 00:23:04,193 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:23:04,343 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:23:04,344 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-30 00:23:04,348 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f72e337/72da5911a38f48218aca5bb02b551497/FLAG7a9dab6b5 [2023-08-30 00:23:04,359 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f72e337/72da5911a38f48218aca5bb02b551497 [2023-08-30 00:23:04,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:23:04,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:23:04,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:04,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:23:04,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:23:04,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:04" (1/1) ... [2023-08-30 00:23:04,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@185ab0f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:04, skipping insertion in model container [2023-08-30 00:23:04,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:04" (1/1) ... [2023-08-30 00:23:04,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:23:04,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:04,522 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-30 00:23:04,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:04,550 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 00:23:04,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e370c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:04, skipping insertion in model container [2023-08-30 00:23:04,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:04,552 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:23:04,554 INFO L158 Benchmark]: Toolchain (without parser) took 190.08ms. Allocated memory is still 83.9MB. Free memory was 56.7MB in the beginning and 46.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:23:04,554 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:23:04,555 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.58ms. Allocated memory is still 83.9MB. Free memory was 56.4MB in the beginning and 46.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:23:04,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.58ms. Allocated memory is still 83.9MB. Free memory was 56.4MB in the beginning and 46.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:23:05,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:23:05,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:23:06,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:23:06,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:23:06,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:23:06,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:23:06,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:23:06,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:23:06,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:23:06,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:23:06,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:23:06,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:23:06,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:23:06,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:23:06,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:23:06,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:23:06,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:23:06,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:23:06,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:23:06,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:23:06,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:23:06,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:23:06,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:23:06,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:23:06,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:23:06,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:23:06,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:23:06,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:23:06,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:23:06,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:23:06,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:23:06,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:23:06,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:23:06,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:23:06,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:23:06,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:23:06,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:23:06,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:23:06,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:23:06,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:23:06,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:23:06,086 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:23:06,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:23:06,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:23:06,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:23:06,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:23:06,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:23:06,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:23:06,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:23:06,089 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:23:06,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:23:06,090 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:23:06,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:23:06,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:23:06,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:23:06,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:23:06,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:23:06,091 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:23:06,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:23:06,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:23:06,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:23:06,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:06,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:23:06,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:23:06,092 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:23:06,093 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:23:06,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:23:06,093 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:23:06,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:23:06,093 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:23:06,093 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:23:06,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:23:06,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:23:06,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:23:06,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:23:06,373 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:23:06,373 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:23:06,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-30 00:23:07,434 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:23:07,594 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:23:07,595 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-30 00:23:07,600 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a7d7d7c3/d2a09346ca704409ae4123457412a786/FLAGd5ce6cd01 [2023-08-30 00:23:07,616 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a7d7d7c3/d2a09346ca704409ae4123457412a786 [2023-08-30 00:23:07,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:23:07,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:23:07,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:07,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:23:07,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:23:07,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e318ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07, skipping insertion in model container [2023-08-30 00:23:07,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:23:07,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:07,786 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-30 00:23:07,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:07,810 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:23:07,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:07,827 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-30 00:23:07,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:07,837 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:23:07,863 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-30 00:23:07,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:07,875 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:23:07,876 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:23:07,881 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:23:07,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07 WrapperNode [2023-08-30 00:23:07,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:07,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:23:07,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:23:07,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:23:07,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,941 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2023-08-30 00:23:07,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:23:07,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:23:07,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:23:07,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:23:07,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:23:07,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:23:07,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:23:07,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:23:07,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (1/1) ... [2023-08-30 00:23:07,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:08,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:23:08,028 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 00:23:08,034 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 00:23:08,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:23:08,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:23:08,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:23:08,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:23:08,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:23:08,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:23:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:23:08,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:23:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:23:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:23:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:23:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:23:08,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:23:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:23:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:23:08,058 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 00:23:08,165 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:23:08,167 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:23:08,506 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:23:08,561 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:23:08,561 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:23:08,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:23:08 BoogieIcfgContainer [2023-08-30 00:23:08,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:23:08,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:23:08,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:23:08,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:23:08,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:23:07" (1/3) ... [2023-08-30 00:23:08,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a21c058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:23:08, skipping insertion in model container [2023-08-30 00:23:08,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:07" (2/3) ... [2023-08-30 00:23:08,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a21c058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:23:08, skipping insertion in model container [2023-08-30 00:23:08,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:23:08" (3/3) ... [2023-08-30 00:23:08,581 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2023-08-30 00:23:08,592 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:23:08,592 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 00:23:08,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:23:08,677 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 00:23:08,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 418 flow [2023-08-30 00:23:08,785 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2023-08-30 00:23:08,785 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:23:08,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-08-30 00:23:08,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 418 flow [2023-08-30 00:23:08,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:08,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:23:08,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:08,808 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:08,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 195 transitions, 402 flow [2023-08-30 00:23:08,843 INFO L130 PetriNetUnfolder]: 15/195 cut-off events. [2023-08-30 00:23:08,843 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:23:08,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 195 events. 15/195 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 218 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-08-30 00:23:08,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2023-08-30 00:23:25,087 INFO L134 LiptonReduction]: Checked pairs total: 3331 [2023-08-30 00:23:25,088 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-08-30 00:23:25,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:23:25,109 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;@6e8e06b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:23:25,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-30 00:23:25,112 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:23:25,113 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:25,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:25,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:25,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:25,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 26589, now seen corresponding path program 1 times [2023-08-30 00:23:25,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:25,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679976304] [2023-08-30 00:23:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:25,149 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 00:23:25,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:25,152 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 00:23:25,155 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 00:23:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:23:25,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:25,385 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:23:25,386 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 00:23:25,426 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 00:23:25,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:25,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:25,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679976304] [2023-08-30 00:23:25,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679976304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:25,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:25,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:25,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955006486] [2023-08-30 00:23:25,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:25,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:25,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:25,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 00:23:25,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:25,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:25,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:25,907 INFO L130 PetriNetUnfolder]: 436/746 cut-off events. [2023-08-30 00:23:25,907 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 00:23:25,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 746 events. 436/746 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4120 event pairs, 378 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 1382. Up to 726 conditions per place. [2023-08-30 00:23:25,913 INFO L137 encePairwiseOnDemand]: 401/413 looper letters, 46 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-30 00:23:25,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 216 flow [2023-08-30 00:23:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-30 00:23:25,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45117029862792574 [2023-08-30 00:23:25,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-30 00:23:25,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-30 00:23:25,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:25,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-30 00:23:25,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 00:23:25,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:25,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:25,935 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 108 flow. Second operand 3 states and 559 transitions. [2023-08-30 00:23:25,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 216 flow [2023-08-30 00:23:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:23:25,938 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 132 flow [2023-08-30 00:23:25,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-30 00:23:25,941 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-30 00:23:25,941 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 132 flow [2023-08-30 00:23:25,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 00:23:25,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:25,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:25,961 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 (2)] Ended with exit code 0 [2023-08-30 00:23:26,149 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 00:23:26,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:26,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:26,150 INFO L85 PathProgramCache]: Analyzing trace with hash 26588, now seen corresponding path program 1 times [2023-08-30 00:23:26,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:26,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814798144] [2023-08-30 00:23:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:26,152 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 00:23:26,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:26,153 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 00:23:26,156 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 00:23:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:26,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:23:26,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:26,218 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:23:26,218 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 00:23:26,225 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 00:23:26,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:26,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814798144] [2023-08-30 00:23:26,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814798144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:26,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:26,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:26,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495653286] [2023-08-30 00:23:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:26,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:26,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:26,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 00:23:26,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:26,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:26,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:26,476 INFO L130 PetriNetUnfolder]: 436/740 cut-off events. [2023-08-30 00:23:26,476 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:26,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1498 conditions, 740 events. 436/740 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4122 event pairs, 378 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 1467. Up to 726 conditions per place. [2023-08-30 00:23:26,480 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 00:23:26,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 212 flow [2023-08-30 00:23:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-30 00:23:26,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390637610976594 [2023-08-30 00:23:26,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-30 00:23:26,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-30 00:23:26,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:26,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-30 00:23:26,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 00:23:26,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:26,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:26,486 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 132 flow. Second operand 3 states and 544 transitions. [2023-08-30 00:23:26,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 212 flow [2023-08-30 00:23:26,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:26,487 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 120 flow [2023-08-30 00:23:26,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 00:23:26,488 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-30 00:23:26,488 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 120 flow [2023-08-30 00:23:26,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 00:23:26,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:26,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:26,498 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 00:23:26,695 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 00:23:26,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:26,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash 827133, now seen corresponding path program 1 times [2023-08-30 00:23:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:26,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033294339] [2023-08-30 00:23:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:26,698 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 00:23:26,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:26,699 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 00:23:26,701 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 00:23:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:23:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:26,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:23:26,796 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 00:23:26,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:26,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:26,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033294339] [2023-08-30 00:23:26,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033294339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:26,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:26,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:26,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856822574] [2023-08-30 00:23:26,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:26,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:26,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 00:23:26,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:26,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:26,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:27,143 INFO L130 PetriNetUnfolder]: 436/738 cut-off events. [2023-08-30 00:23:27,144 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 738 events. 436/738 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4090 event pairs, 378 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 1483. Up to 720 conditions per place. [2023-08-30 00:23:27,148 INFO L137 encePairwiseOnDemand]: 411/413 looper letters, 40 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 00:23:27,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 202 flow [2023-08-30 00:23:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-30 00:23:27,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43664245359160614 [2023-08-30 00:23:27,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-30 00:23:27,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-30 00:23:27,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:27,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-30 00:23:27,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 00:23:27,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:27,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:27,154 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 120 flow. Second operand 3 states and 541 transitions. [2023-08-30 00:23:27,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 202 flow [2023-08-30 00:23:27,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:27,157 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 121 flow [2023-08-30 00:23:27,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-30 00:23:27,160 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-30 00:23:27,160 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 121 flow [2023-08-30 00:23:27,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 00:23:27,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:27,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:27,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-30 00:23:27,367 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 00:23:27,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:27,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:27,373 INFO L85 PathProgramCache]: Analyzing trace with hash 826017, now seen corresponding path program 1 times [2023-08-30 00:23:27,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:27,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654659798] [2023-08-30 00:23:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:27,375 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 00:23:27,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:27,389 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 00:23:27,392 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 00:23:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:27,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:23:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:27,536 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:23:27,536 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 00:23:27,593 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 00:23:27,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:27,733 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 00:23:27,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:27,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654659798] [2023-08-30 00:23:27,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654659798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:27,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:27,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:23:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179200997] [2023-08-30 00:23:27,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:27,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:23:27,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:23:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:23:28,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 00:23:28,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 00:23:28,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:28,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 00:23:28,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:29,369 INFO L130 PetriNetUnfolder]: 878/1482 cut-off events. [2023-08-30 00:23:29,369 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:29,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 1482 events. 878/1482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 9383 event pairs, 756 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 2992. Up to 723 conditions per place. [2023-08-30 00:23:29,374 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 71 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2023-08-30 00:23:29,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 443 flow [2023-08-30 00:23:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:23:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:23:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-08-30 00:23:29,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188861985472155 [2023-08-30 00:23:29,378 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-08-30 00:23:29,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-08-30 00:23:29,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:29,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-08-30 00:23:29,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states 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 00:23:29,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states 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 00:23:29,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states 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 00:23:29,384 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 121 flow. Second operand 6 states and 1038 transitions. [2023-08-30 00:23:29,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 443 flow [2023-08-30 00:23:29,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 92 transitions, 438 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:29,387 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 279 flow [2023-08-30 00:23:29,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2023-08-30 00:23:29,388 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-30 00:23:29,388 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 279 flow [2023-08-30 00:23:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 00:23:29,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:29,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:23:29,413 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 00:23:29,595 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 00:23:29,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:29,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:29,597 INFO L85 PathProgramCache]: Analyzing trace with hash 25640801, now seen corresponding path program 1 times [2023-08-30 00:23:29,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:29,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784604656] [2023-08-30 00:23:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:29,598 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 00:23:29,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:29,599 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 00:23:29,604 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 00:23:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:23:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:29,730 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 00:23:29,731 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 00:23:29,748 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 00:23:29,824 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 00:23:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:23:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:29,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:29,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:29,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784604656] [2023-08-30 00:23:29,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784604656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:29,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:29,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:29,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490576827] [2023-08-30 00:23:29,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:29,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:29,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:30,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:30,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 00:23:30,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:30,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:30,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:30,505 INFO L130 PetriNetUnfolder]: 876/1478 cut-off events. [2023-08-30 00:23:30,505 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:23:30,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 1478 events. 876/1478 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 9370 event pairs, 756 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 3026. Up to 1443 conditions per place. [2023-08-30 00:23:30,510 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 48 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-08-30 00:23:30,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 363 flow [2023-08-30 00:23:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:23:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:23:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-08-30 00:23:30,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279661016949153 [2023-08-30 00:23:30,512 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-08-30 00:23:30,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-08-30 00:23:30,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:30,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-08-30 00:23:30,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 0 states 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 00:23:30,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:30,517 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:30,517 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 279 flow. Second operand 4 states and 707 transitions. [2023-08-30 00:23:30,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 363 flow [2023-08-30 00:23:30,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 348 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:30,523 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 252 flow [2023-08-30 00:23:30,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2023-08-30 00:23:30,525 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 00:23:30,525 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 252 flow [2023-08-30 00:23:30,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 00:23:30,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:30,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:23:30,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:30,733 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 00:23:30,733 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:30,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash 25640802, now seen corresponding path program 1 times [2023-08-30 00:23:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:30,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739363292] [2023-08-30 00:23:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:30,735 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 00:23:30,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:30,736 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 00:23:30,786 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 00:23:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:23:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:30,869 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 00:23:30,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 00:23:30,904 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:23:30,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:23:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:30,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:30,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739363292] [2023-08-30 00:23:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739363292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:30,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:30,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100374917] [2023-08-30 00:23:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:31,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 413 [2023-08-30 00:23:31,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 00:23:31,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:31,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 413 [2023-08-30 00:23:31,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:31,234 INFO L130 PetriNetUnfolder]: 666/1156 cut-off events. [2023-08-30 00:23:31,234 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:23:31,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1156 events. 666/1156 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 7070 event pairs, 568 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 2368. Up to 1128 conditions per place. [2023-08-30 00:23:31,239 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 49 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 00:23:31,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 328 flow [2023-08-30 00:23:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-30 00:23:31,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44229217110573044 [2023-08-30 00:23:31,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-30 00:23:31,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-30 00:23:31,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:31,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-30 00:23:31,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:31,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:31,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:31,244 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 252 flow. Second operand 3 states and 548 transitions. [2023-08-30 00:23:31,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 328 flow [2023-08-30 00:23:31,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:31,246 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 223 flow [2023-08-30 00:23:31,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-30 00:23:31,250 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-30 00:23:31,250 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 223 flow [2023-08-30 00:23:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 00:23:31,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:31,250 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:23:31,263 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 00:23:31,458 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 00:23:31,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:31,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1160185635, now seen corresponding path program 2 times [2023-08-30 00:23:31,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:31,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98689262] [2023-08-30 00:23:31,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:23:31,463 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 00:23:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:31,477 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 00:23:31,540 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 00:23:31,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:23:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:23:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:23:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:31,626 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:23:31,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 00:23:31,728 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 00:23:31,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:32,150 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 00:23:32,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:32,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98689262] [2023-08-30 00:23:32,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98689262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:32,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:32,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:23:32,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511167294] [2023-08-30 00:23:32,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:32,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:23:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:23:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:23:34,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:23:34,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 00:23:34,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:34,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:23:34,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:38,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:40,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:42,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:43,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:45,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:23:48,182 INFO L130 PetriNetUnfolder]: 2646/4582 cut-off events. [2023-08-30 00:23:48,182 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 00:23:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 4582 events. 2646/4582 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33474 event pairs, 2272 based on Foata normal form. 12/1781 useless extension candidates. Maximal degree in co-relation 9274. Up to 558 conditions per place. [2023-08-30 00:23:48,212 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 245 selfloop transitions, 33 changer transitions 0/280 dead transitions. [2023-08-30 00:23:48,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 280 transitions, 1389 flow [2023-08-30 00:23:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:23:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:23:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2198 transitions. [2023-08-30 00:23:48,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435028248587571 [2023-08-30 00:23:48,218 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2198 transitions. [2023-08-30 00:23:48,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2198 transitions. [2023-08-30 00:23:48,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:48,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2198 transitions. [2023-08-30 00:23:48,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.16666666666666) internal successors, (2198), 12 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states 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 00:23:48,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states 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 00:23:48,226 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states 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 00:23:48,226 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 223 flow. Second operand 12 states and 2198 transitions. [2023-08-30 00:23:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 280 transitions, 1389 flow [2023-08-30 00:23:48,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 280 transitions, 1388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:48,230 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 494 flow [2023-08-30 00:23:48,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=494, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2023-08-30 00:23:48,231 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-08-30 00:23:48,231 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 494 flow [2023-08-30 00:23:48,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 00:23:48,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:48,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:23:48,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 00:23:48,438 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 00:23:48,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:48,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971168, now seen corresponding path program 1 times [2023-08-30 00:23:48,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:48,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310975376] [2023-08-30 00:23:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:48,439 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 00:23:48,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:48,440 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 00:23:48,451 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 00:23:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:23:48,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:48,568 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 00:23:48,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 00:23:48,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 00:23:48,608 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 00:23:48,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:23:48,712 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 00:23:48,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:48,998 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 00:23:48,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:48,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310975376] [2023-08-30 00:23:48,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310975376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:48,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:48,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-08-30 00:23:48,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36661921] [2023-08-30 00:23:48,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:48,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 00:23:48,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 00:23:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-08-30 00:23:50,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-08-30 00:23:50,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 494 flow. Second operand has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states 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 00:23:50,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:50,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-08-30 00:23:50,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:51,365 INFO L130 PetriNetUnfolder]: 2518/4326 cut-off events. [2023-08-30 00:23:51,365 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 00:23:51,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8861 conditions, 4326 events. 2518/4326 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 31588 event pairs, 2160 based on Foata normal form. 0/1717 useless extension candidates. Maximal degree in co-relation 8839. Up to 3667 conditions per place. [2023-08-30 00:23:51,385 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 79 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2023-08-30 00:23:51,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 748 flow [2023-08-30 00:23:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:23:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:23:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1312 transitions. [2023-08-30 00:23:51,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39709443099273606 [2023-08-30 00:23:51,388 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1312 transitions. [2023-08-30 00:23:51,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1312 transitions. [2023-08-30 00:23:51,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:51,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1312 transitions. [2023-08-30 00:23:51,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 00:23:51,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states 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 00:23:51,394 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states 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 00:23:51,394 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 494 flow. Second operand 8 states and 1312 transitions. [2023-08-30 00:23:51,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 748 flow [2023-08-30 00:23:51,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 702 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:23:51,397 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 491 flow [2023-08-30 00:23:51,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-30 00:23:51,399 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2023-08-30 00:23:51,399 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 491 flow [2023-08-30 00:23:51,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states 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 00:23:51,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:51,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:23:51,422 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 00:23:51,607 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 00:23:51,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:51,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971167, now seen corresponding path program 1 times [2023-08-30 00:23:51,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:51,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335871590] [2023-08-30 00:23:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:51,611 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 00:23:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:51,614 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 00:23:51,615 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 00:23:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:23:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:51,736 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 00:23:51,736 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 00:23:51,763 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:23:51,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:23:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:51,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:51,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:51,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335871590] [2023-08-30 00:23:51,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335871590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:51,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:51,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526277066] [2023-08-30 00:23:51,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:51,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:51,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-08-30 00:23:51,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 491 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 00:23:51,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:51,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-08-30 00:23:51,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:52,363 INFO L130 PetriNetUnfolder]: 2390/4070 cut-off events. [2023-08-30 00:23:52,363 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-30 00:23:52,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 4070 events. 2390/4070 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 28849 event pairs, 2048 based on Foata normal form. 0/1678 useless extension candidates. Maximal degree in co-relation 8315. Up to 3958 conditions per place. [2023-08-30 00:23:52,383 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 66 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-30 00:23:52,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 621 flow [2023-08-30 00:23:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-30 00:23:52,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43422114608555284 [2023-08-30 00:23:52,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-30 00:23:52,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-30 00:23:52,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:52,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-30 00:23:52,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:52,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:52,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:23:52,392 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 491 flow. Second operand 3 states and 538 transitions. [2023-08-30 00:23:52,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 621 flow [2023-08-30 00:23:52,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 584 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 00:23:52,402 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 452 flow [2023-08-30 00:23:52,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-08-30 00:23:52,403 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2023-08-30 00:23:52,403 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 452 flow [2023-08-30 00:23:52,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 00:23:52,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:52,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:23:52,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:52,611 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 00:23:52,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:52,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971283, now seen corresponding path program 1 times [2023-08-30 00:23:52,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:52,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236606289] [2023-08-30 00:23:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:52,613 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 00:23:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:52,614 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 00:23:52,616 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 00:23:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:23:52,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:52,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:23:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:52,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:52,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:52,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236606289] [2023-08-30 00:23:52,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236606289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:52,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:52,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:23:52,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325025077] [2023-08-30 00:23:52,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:52,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:52,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:52,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:23:52,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states 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 00:23:52,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:52,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:23:52,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:53,182 INFO L130 PetriNetUnfolder]: 1998/3398 cut-off events. [2023-08-30 00:23:53,182 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-08-30 00:23:53,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6974 conditions, 3398 events. 1998/3398 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23258 event pairs, 1664 based on Foata normal form. 0/1510 useless extension candidates. Maximal degree in co-relation 6950. Up to 3266 conditions per place. [2023-08-30 00:23:53,196 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 58 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2023-08-30 00:23:53,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 578 flow [2023-08-30 00:23:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:23:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:23:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 668 transitions. [2023-08-30 00:23:53,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043583535108959 [2023-08-30 00:23:53,198 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 668 transitions. [2023-08-30 00:23:53,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 668 transitions. [2023-08-30 00:23:53,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:53,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 668 transitions. [2023-08-30 00:23:53,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states 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 00:23:53,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:53,202 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:53,202 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 452 flow. Second operand 4 states and 668 transitions. [2023-08-30 00:23:53,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 578 flow [2023-08-30 00:23:53,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:53,204 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 461 flow [2023-08-30 00:23:53,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-08-30 00:23:53,205 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2023-08-30 00:23:53,205 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 461 flow [2023-08-30 00:23:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states 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 00:23:53,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:53,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:23:53,215 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 00:23:53,415 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 00:23:53,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:53,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971282, now seen corresponding path program 1 times [2023-08-30 00:23:53,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:53,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492731966] [2023-08-30 00:23:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:53,416 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 00:23:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:53,423 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 00:23:53,424 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 00:23:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:23:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:53,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:53,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492731966] [2023-08-30 00:23:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492731966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:53,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:53,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:23:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000761897] [2023-08-30 00:23:53,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:23:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:23:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:23:53,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-30 00:23:53,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 461 flow. Second operand has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 00:23:53,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:53,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-30 00:23:53,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:54,375 INFO L130 PetriNetUnfolder]: 3534/5974 cut-off events. [2023-08-30 00:23:54,376 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-30 00:23:54,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12209 conditions, 5974 events. 3534/5974 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 45165 event pairs, 1280 based on Foata normal form. 0/2718 useless extension candidates. Maximal degree in co-relation 12184. Up to 3521 conditions per place. [2023-08-30 00:23:54,405 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 76 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2023-08-30 00:23:54,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 674 flow [2023-08-30 00:23:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:23:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:23:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2023-08-30 00:23:54,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43099273607748184 [2023-08-30 00:23:54,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2023-08-30 00:23:54,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2023-08-30 00:23:54,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:54,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2023-08-30 00:23:54,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 00:23:54,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:54,411 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:54,411 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 461 flow. Second operand 4 states and 712 transitions. [2023-08-30 00:23:54,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 674 flow [2023-08-30 00:23:54,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 666 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:54,414 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 491 flow [2023-08-30 00:23:54,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=491, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-30 00:23:54,414 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2023-08-30 00:23:54,414 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 491 flow [2023-08-30 00:23:54,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 00:23:54,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:54,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:23:54,441 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 (12)] Ended with exit code 0 [2023-08-30 00:23:54,622 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 00:23:54,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:54,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971162, now seen corresponding path program 1 times [2023-08-30 00:23:54,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:54,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961592556] [2023-08-30 00:23:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:54,624 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 00:23:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:54,625 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 00:23:54,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:23:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:54,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:23:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:54,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:54,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:54,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961592556] [2023-08-30 00:23:54,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961592556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:54,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:54,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187825589] [2023-08-30 00:23:54,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:54,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:54,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:54,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 00:23:54,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 00:23:54,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:54,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 00:23:54,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:55,575 INFO L130 PetriNetUnfolder]: 4080/7108 cut-off events. [2023-08-30 00:23:55,575 INFO L131 PetriNetUnfolder]: For 703/703 co-relation queries the response was YES. [2023-08-30 00:23:55,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15970 conditions, 7108 events. 4080/7108 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 56519 event pairs, 3552 based on Foata normal form. 128/4148 useless extension candidates. Maximal degree in co-relation 15944. Up to 5893 conditions per place. [2023-08-30 00:23:55,605 INFO L137 encePairwiseOnDemand]: 403/413 looper letters, 97 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-08-30 00:23:55,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 102 transitions, 918 flow [2023-08-30 00:23:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:23:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:23:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-08-30 00:23:55,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43825665859564167 [2023-08-30 00:23:55,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-08-30 00:23:55,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-08-30 00:23:55,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:55,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-08-30 00:23:55,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:23:55,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:55,611 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:55,611 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 491 flow. Second operand 4 states and 724 transitions. [2023-08-30 00:23:55,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 102 transitions, 918 flow [2023-08-30 00:23:55,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 901 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:55,614 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 502 flow [2023-08-30 00:23:55,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=502, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-08-30 00:23:55,615 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-08-30 00:23:55,615 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 502 flow [2023-08-30 00:23:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 00:23:55,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:55,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:23:55,623 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 00:23:55,823 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 00:23:55,823 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:55,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800086, now seen corresponding path program 1 times [2023-08-30 00:23:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:55,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907245925] [2023-08-30 00:23:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:55,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:55,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:55,825 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 00:23:55,827 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 (14)] Waiting until timeout for monitored process [2023-08-30 00:23:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:23:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:55,968 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:23:55,968 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 00:23:55,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:23:55,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:23:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:23:55,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:55,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:55,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907245925] [2023-08-30 00:23:55,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907245925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:55,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:55,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:55,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465443479] [2023-08-30 00:23:55,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:55,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:55,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:56,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-30 00:23:56,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states 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 00:23:56,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:56,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-30 00:23:56,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:56,634 INFO L130 PetriNetUnfolder]: 3048/5428 cut-off events. [2023-08-30 00:23:56,634 INFO L131 PetriNetUnfolder]: For 1439/1463 co-relation queries the response was YES. [2023-08-30 00:23:56,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13429 conditions, 5428 events. 3048/5428 cut-off events. For 1439/1463 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42264 event pairs, 2600 based on Foata normal form. 0/4108 useless extension candidates. Maximal degree in co-relation 13402. Up to 5327 conditions per place. [2023-08-30 00:23:56,652 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 53 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2023-08-30 00:23:56,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 624 flow [2023-08-30 00:23:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:23:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:23:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 690 transitions. [2023-08-30 00:23:56,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41767554479418884 [2023-08-30 00:23:56,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 690 transitions. [2023-08-30 00:23:56,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 690 transitions. [2023-08-30 00:23:56,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:56,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 690 transitions. [2023-08-30 00:23:56,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 00:23:56,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:56,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:23:56,658 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 502 flow. Second operand 4 states and 690 transitions. [2023-08-30 00:23:56,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 624 flow [2023-08-30 00:23:56,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 619 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:56,661 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 513 flow [2023-08-30 00:23:56,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=513, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2023-08-30 00:23:56,662 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2023-08-30 00:23:56,662 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 513 flow [2023-08-30 00:23:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states 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 00:23:56,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:56,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:23:56,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:56,870 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 00:23:56,870 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:23:56,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800085, now seen corresponding path program 1 times [2023-08-30 00:23:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:56,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329276127] [2023-08-30 00:23:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:56,871 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 00:23:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:56,872 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 00:23:56,874 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 00:23:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:56,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:23:56,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:57,044 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:23:57,044 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 00:23:57,083 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:23:57,084 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 00:23:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:57,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:23:57,163 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:23:57,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:23:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:57,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:02,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:02,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329276127] [2023-08-30 00:24:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329276127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:02,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:02,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:24:02,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759490816] [2023-08-30 00:24:02,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:24:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:24:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:24:06,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 413 [2023-08-30 00:24:06,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 00:24:06,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:06,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 413 [2023-08-30 00:24:06,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:19,505 WARN L222 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:24:30,319 INFO L130 PetriNetUnfolder]: 6284/11120 cut-off events. [2023-08-30 00:24:30,320 INFO L131 PetriNetUnfolder]: For 3376/3400 co-relation queries the response was YES. [2023-08-30 00:24:30,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27355 conditions, 11120 events. 6284/11120 cut-off events. For 3376/3400 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 94010 event pairs, 5256 based on Foata normal form. 352/9208 useless extension candidates. Maximal degree in co-relation 27328. Up to 4194 conditions per place. [2023-08-30 00:24:30,363 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 125 selfloop transitions, 36 changer transitions 0/163 dead transitions. [2023-08-30 00:24:30,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 163 transitions, 1382 flow [2023-08-30 00:24:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:24:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:24:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2339 transitions. [2023-08-30 00:24:30,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37756255044390635 [2023-08-30 00:24:30,369 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2339 transitions. [2023-08-30 00:24:30,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2339 transitions. [2023-08-30 00:24:30,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:30,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2339 transitions. [2023-08-30 00:24:30,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 155.93333333333334) internal successors, (2339), 15 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states 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 00:24:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states 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 00:24:30,378 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states 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 00:24:30,378 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 513 flow. Second operand 15 states and 2339 transitions. [2023-08-30 00:24:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 163 transitions, 1382 flow [2023-08-30 00:24:30,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 163 transitions, 1369 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:30,386 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 825 flow [2023-08-30 00:24:30,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=825, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-30 00:24:30,386 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2023-08-30 00:24:30,386 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 825 flow [2023-08-30 00:24:30,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 00:24:30,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:30,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:30,395 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 00:24:30,595 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 00:24:30,595 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:30,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1685451407, now seen corresponding path program 1 times [2023-08-30 00:24:30,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:30,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43845470] [2023-08-30 00:24:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:30,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:30,597 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 00:24:30,599 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 00:24:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:24:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:30,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:30,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43845470] [2023-08-30 00:24:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43845470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:30,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:30,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931043862] [2023-08-30 00:24:30,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:30,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:30,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:30,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-08-30 00:24:30,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 825 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 00:24:30,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:30,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-08-30 00:24:30,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:31,625 INFO L130 PetriNetUnfolder]: 4204/7896 cut-off events. [2023-08-30 00:24:31,626 INFO L131 PetriNetUnfolder]: For 4201/4201 co-relation queries the response was YES. [2023-08-30 00:24:31,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20584 conditions, 7896 events. 4204/7896 cut-off events. For 4201/4201 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 66838 event pairs, 3440 based on Foata normal form. 0/7320 useless extension candidates. Maximal degree in co-relation 20551. Up to 7669 conditions per place. [2023-08-30 00:24:31,675 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 52 selfloop transitions, 31 changer transitions 0/85 dead transitions. [2023-08-30 00:24:31,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 85 transitions, 989 flow [2023-08-30 00:24:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 700 transitions. [2023-08-30 00:24:31,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423728813559322 [2023-08-30 00:24:31,695 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 700 transitions. [2023-08-30 00:24:31,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 700 transitions. [2023-08-30 00:24:31,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:31,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 700 transitions. [2023-08-30 00:24:31,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:31,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:24:31,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:24:31,699 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 825 flow. Second operand 4 states and 700 transitions. [2023-08-30 00:24:31,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 85 transitions, 989 flow [2023-08-30 00:24:31,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 85 transitions, 969 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:31,715 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 865 flow [2023-08-30 00:24:31,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=865, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2023-08-30 00:24:31,715 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2023-08-30 00:24:31,716 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 865 flow [2023-08-30 00:24:31,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 00:24:31,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:31,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:31,725 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 00:24:31,923 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 00:24:31,924 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:31,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1685344759, now seen corresponding path program 1 times [2023-08-30 00:24:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:31,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613905606] [2023-08-30 00:24:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:31,925 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 00:24:31,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:31,926 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 00:24:31,928 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 00:24:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:24:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:32,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:24:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:32,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:32,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:32,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613905606] [2023-08-30 00:24:32,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613905606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:32,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:32,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:24:32,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561130109] [2023-08-30 00:24:32,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:32,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:24:32,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:32,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:24:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:24:35,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 00:24:35,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 865 flow. Second operand has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states 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 00:24:35,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:35,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 00:24:35,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:39,470 INFO L130 PetriNetUnfolder]: 8420/15280 cut-off events. [2023-08-30 00:24:39,471 INFO L131 PetriNetUnfolder]: For 6613/6709 co-relation queries the response was YES. [2023-08-30 00:24:39,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40074 conditions, 15280 events. 8420/15280 cut-off events. For 6613/6709 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 135730 event pairs, 928 based on Foata normal form. 768/14968 useless extension candidates. Maximal degree in co-relation 40040. Up to 4336 conditions per place. [2023-08-30 00:24:39,567 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 96 selfloop transitions, 42 changer transitions 0/140 dead transitions. [2023-08-30 00:24:39,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 140 transitions, 1337 flow [2023-08-30 00:24:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:24:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:24:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-30 00:24:39,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067796610169492 [2023-08-30 00:24:39,575 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-30 00:24:39,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-30 00:24:39,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:39,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-30 00:24:39,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 00:24:39,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states 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 00:24:39,593 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states 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 00:24:39,593 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 865 flow. Second operand 8 states and 1344 transitions. [2023-08-30 00:24:39,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 140 transitions, 1337 flow [2023-08-30 00:24:39,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 140 transitions, 1275 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:24:39,607 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 971 flow [2023-08-30 00:24:39,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=971, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2023-08-30 00:24:39,608 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2023-08-30 00:24:39,608 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 971 flow [2023-08-30 00:24:39,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states 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 00:24:39,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:39,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:39,616 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 (17)] Ended with exit code 0 [2023-08-30 00:24:39,816 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 00:24:39,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:39,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:39,817 INFO L85 PathProgramCache]: Analyzing trace with hash -944515027, now seen corresponding path program 1 times [2023-08-30 00:24:39,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:39,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760426127] [2023-08-30 00:24:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:39,817 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 00:24:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:39,818 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 00:24:39,820 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 00:24:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 00:24:39,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:24:39,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:40,042 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 11 treesize of output 9 [2023-08-30 00:24:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:24:40,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:40,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760426127] [2023-08-30 00:24:40,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760426127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:40,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:40,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:24:40,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884668111] [2023-08-30 00:24:40,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:40,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:24:40,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:24:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:24:41,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 413 [2023-08-30 00:24:41,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 971 flow. Second operand has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 00:24:41,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:41,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 413 [2023-08-30 00:24:41,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:44,057 INFO L130 PetriNetUnfolder]: 7860/14608 cut-off events. [2023-08-30 00:24:44,057 INFO L131 PetriNetUnfolder]: For 14438/14534 co-relation queries the response was YES. [2023-08-30 00:24:44,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45895 conditions, 14608 events. 7860/14608 cut-off events. For 14438/14534 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 131730 event pairs, 928 based on Foata normal form. 624/14920 useless extension candidates. Maximal degree in co-relation 45856. Up to 3025 conditions per place. [2023-08-30 00:24:44,134 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 121 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2023-08-30 00:24:44,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1528 flow [2023-08-30 00:24:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:24:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:24:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1706 transitions. [2023-08-30 00:24:44,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41307506053268767 [2023-08-30 00:24:44,138 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1706 transitions. [2023-08-30 00:24:44,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1706 transitions. [2023-08-30 00:24:44,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:44,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1706 transitions. [2023-08-30 00:24:44,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.6) internal successors, (1706), 10 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states 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 00:24:44,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states 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 00:24:44,144 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states 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 00:24:44,144 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 971 flow. Second operand 10 states and 1706 transitions. [2023-08-30 00:24:44,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1528 flow [2023-08-30 00:24:44,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 159 transitions, 1453 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 00:24:44,220 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 1008 flow [2023-08-30 00:24:44,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1008, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2023-08-30 00:24:44,221 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2023-08-30 00:24:44,221 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 1008 flow [2023-08-30 00:24:44,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 00:24:44,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:44,221 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:44,245 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 (18)] Ended with exit code 0 [2023-08-30 00:24:44,429 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 00:24:44,429 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:44,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1188910439, now seen corresponding path program 2 times [2023-08-30 00:24:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:44,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442016249] [2023-08-30 00:24:44,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:24:44,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:44,431 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 00:24:44,433 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 00:24:44,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:24:44,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:24:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:24:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:44,588 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:24:44,589 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 00:24:44,645 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 00:24:44,645 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 00:24:44,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:44,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:24:44,752 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:24:44,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:24:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 00:24:44,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:44,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:44,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442016249] [2023-08-30 00:24:44,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442016249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:44,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:44,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435434805] [2023-08-30 00:24:44,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:45,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 413 [2023-08-30 00:24:45,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 1008 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 00:24:45,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:45,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 413 [2023-08-30 00:24:45,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:46,719 INFO L130 PetriNetUnfolder]: 6764/12808 cut-off events. [2023-08-30 00:24:46,720 INFO L131 PetriNetUnfolder]: For 14997/15061 co-relation queries the response was YES. [2023-08-30 00:24:46,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39909 conditions, 12808 events. 6764/12808 cut-off events. For 14997/15061 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 115416 event pairs, 5664 based on Foata normal form. 712/13360 useless extension candidates. Maximal degree in co-relation 39869. Up to 12627 conditions per place. [2023-08-30 00:24:46,818 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 77 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2023-08-30 00:24:46,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 91 transitions, 1116 flow [2023-08-30 00:24:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 670 transitions. [2023-08-30 00:24:46,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40556900726392253 [2023-08-30 00:24:46,823 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 670 transitions. [2023-08-30 00:24:46,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 670 transitions. [2023-08-30 00:24:46,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:46,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 670 transitions. [2023-08-30 00:24:46,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.5) internal successors, (670), 4 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 00:24:46,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:24:46,826 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 00:24:46,827 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 1008 flow. Second operand 4 states and 670 transitions. [2023-08-30 00:24:46,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 91 transitions, 1116 flow [2023-08-30 00:24:46,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 1043 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 00:24:46,877 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 889 flow [2023-08-30 00:24:46,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2023-08-30 00:24:46,878 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-08-30 00:24:46,878 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 889 flow [2023-08-30 00:24:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 00:24:46,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:46,879 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:24:46,886 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 00:24:47,085 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 00:24:47,086 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:24:47,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash 149348957, now seen corresponding path program 3 times [2023-08-30 00:24:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:47,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505168359] [2023-08-30 00:24:47,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:24:47,087 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 00:24:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:47,087 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 00:24:47,090 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 00:24:47,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:24:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:24:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:24:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:47,295 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:24:47,295 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 00:24:47,792 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 00:24:47,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:50,542 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 00:24:50,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:50,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505168359] [2023-08-30 00:24:50,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505168359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:50,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:50,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:24:50,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276669350] [2023-08-30 00:24:50,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:50,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:24:50,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:24:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:25:07,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:25:07,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 889 flow. Second operand has 24 states, 24 states have (on average 160.0) internal successors, (3840), 24 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 00:25:07,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:07,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:25:07,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:17,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:19,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:21,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:23,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:24,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:26,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:28,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:29,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:31,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:33,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:37,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:39,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:40,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:43,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:47,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:54,314 INFO L130 PetriNetUnfolder]: 12669/23981 cut-off events. [2023-08-30 00:25:54,314 INFO L131 PetriNetUnfolder]: For 12931/12937 co-relation queries the response was YES. [2023-08-30 00:25:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69871 conditions, 23981 events. 12669/23981 cut-off events. For 12931/12937 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 227216 event pairs, 10620 based on Foata normal form. 32/23543 useless extension candidates. Maximal degree in co-relation 69833. Up to 3781 conditions per place. [2023-08-30 00:25:54,518 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 467 selfloop transitions, 70 changer transitions 0/539 dead transitions. [2023-08-30 00:25:54,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 539 transitions, 4526 flow [2023-08-30 00:25:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 00:25:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 00:25:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4645 transitions. [2023-08-30 00:25:54,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416554569096942 [2023-08-30 00:25:54,526 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4645 transitions. [2023-08-30 00:25:54,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4645 transitions. [2023-08-30 00:25:54,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:54,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4645 transitions. [2023-08-30 00:25:54,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 172.03703703703704) internal successors, (4645), 27 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states 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 00:25:54,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states 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 00:25:54,539 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states 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 00:25:54,539 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 889 flow. Second operand 27 states and 4645 transitions. [2023-08-30 00:25:54,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 539 transitions, 4526 flow [2023-08-30 00:25:54,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 539 transitions, 4501 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:25:54,874 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1508 flow [2023-08-30 00:25:54,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1508, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2023-08-30 00:25:54,875 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2023-08-30 00:25:54,875 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1508 flow [2023-08-30 00:25:54,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 160.0) internal successors, (3840), 24 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 00:25:54,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:54,876 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:25:54,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:55,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:55,077 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:25:55,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1635547502, now seen corresponding path program 2 times [2023-08-30 00:25:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305779388] [2023-08-30 00:25:55,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:25:55,078 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 00:25:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:55,079 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:55,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:25:55,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:25:55,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:25:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:25:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:55,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:25:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:55,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:56,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305779388] [2023-08-30 00:25:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305779388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:56,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:56,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-08-30 00:25:56,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801016249] [2023-08-30 00:25:56,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:56,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:25:56,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:25:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:26:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 413 [2023-08-30 00:26:06,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1508 flow. Second operand has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states 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 00:26:06,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:06,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 413 [2023-08-30 00:26:06,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:11,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:26:17,952 INFO L130 PetriNetUnfolder]: 12370/23424 cut-off events. [2023-08-30 00:26:17,952 INFO L131 PetriNetUnfolder]: For 9251/9251 co-relation queries the response was YES. [2023-08-30 00:26:18,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68586 conditions, 23424 events. 12370/23424 cut-off events. For 9251/9251 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 221064 event pairs, 1410 based on Foata normal form. 90/23034 useless extension candidates. Maximal degree in co-relation 68532. Up to 8255 conditions per place. [2023-08-30 00:26:18,228 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 162 selfloop transitions, 89 changer transitions 0/253 dead transitions. [2023-08-30 00:26:18,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 253 transitions, 2418 flow [2023-08-30 00:26:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:26:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:26:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3174 transitions. [2023-08-30 00:26:18,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842615012106538 [2023-08-30 00:26:18,234 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3174 transitions. [2023-08-30 00:26:18,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3174 transitions. [2023-08-30 00:26:18,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:18,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3174 transitions. [2023-08-30 00:26:18,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 158.7) internal successors, (3174), 20 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states 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 00:26:18,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states 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 00:26:18,241 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states 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 00:26:18,242 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1508 flow. Second operand 20 states and 3174 transitions. [2023-08-30 00:26:18,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 253 transitions, 2418 flow [2023-08-30 00:26:18,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 253 transitions, 2260 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-08-30 00:26:18,439 INFO L231 Difference]: Finished difference. Result has 146 places, 140 transitions, 1639 flow [2023-08-30 00:26:18,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1639, PETRI_PLACES=146, PETRI_TRANSITIONS=140} [2023-08-30 00:26:18,439 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2023-08-30 00:26:18,439 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 140 transitions, 1639 flow [2023-08-30 00:26:18,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states 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 00:26:18,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:18,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:18,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:18,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:18,648 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:26:18,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1883482390, now seen corresponding path program 1 times [2023-08-30 00:26:18,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:18,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155703200] [2023-08-30 00:26:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:18,649 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 00:26:18,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:18,650 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:18,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:26:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:18,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:26:18,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:26:18,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:26:18,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155703200] [2023-08-30 00:26:18,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155703200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:26:18,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:26:18,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:26:18,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874064367] [2023-08-30 00:26:18,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:26:18,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:26:18,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:26:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:26:18,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 413 [2023-08-30 00:26:18,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 140 transitions, 1639 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 00:26:18,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:18,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 413 [2023-08-30 00:26:18,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:24,357 INFO L130 PetriNetUnfolder]: 26085/44763 cut-off events. [2023-08-30 00:26:24,358 INFO L131 PetriNetUnfolder]: For 38611/38611 co-relation queries the response was YES. [2023-08-30 00:26:24,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139890 conditions, 44763 events. 26085/44763 cut-off events. For 38611/38611 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 377500 event pairs, 6773 based on Foata normal form. 2708/47471 useless extension candidates. Maximal degree in co-relation 139833. Up to 18230 conditions per place. [2023-08-30 00:26:24,714 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 128 selfloop transitions, 58 changer transitions 0/186 dead transitions. [2023-08-30 00:26:24,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 186 transitions, 2310 flow [2023-08-30 00:26:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:26:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:26:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2023-08-30 00:26:24,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43341404358353514 [2023-08-30 00:26:24,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2023-08-30 00:26:24,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2023-08-30 00:26:24,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:24,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2023-08-30 00:26:24,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states 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 00:26:24,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states 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 00:26:24,719 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states 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 00:26:24,719 INFO L175 Difference]: Start difference. First operand has 146 places, 140 transitions, 1639 flow. Second operand 5 states and 895 transitions. [2023-08-30 00:26:24,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 186 transitions, 2310 flow [2023-08-30 00:26:25,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 186 transitions, 2088 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-08-30 00:26:25,869 INFO L231 Difference]: Finished difference. Result has 142 places, 170 transitions, 1880 flow [2023-08-30 00:26:25,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1880, PETRI_PLACES=142, PETRI_TRANSITIONS=170} [2023-08-30 00:26:25,870 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2023-08-30 00:26:25,870 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 170 transitions, 1880 flow [2023-08-30 00:26:25,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 00:26:25,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:25,870 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1] [2023-08-30 00:26:25,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-08-30 00:26:26,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:26,078 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:26:26,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1052899988, now seen corresponding path program 3 times [2023-08-30 00:26:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309363334] [2023-08-30 00:26:26,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:26:26,079 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 00:26:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:26,080 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:26,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:26:26,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:26:26,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:26:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:26:26,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:26:26,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 00:26:26,389 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 51 treesize of output 19 [2023-08-30 00:26:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-30 00:26:26,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:26:26,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309363334] [2023-08-30 00:26:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309363334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:26:26,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:26:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:26:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769056017] [2023-08-30 00:26:26,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:26:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:26:26,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:26:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:26:27,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 00:26:27,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 170 transitions, 1880 flow. Second operand has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 00:26:27,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:27,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 00:26:27,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:33,014 INFO L130 PetriNetUnfolder]: 19314/35811 cut-off events. [2023-08-30 00:26:33,014 INFO L131 PetriNetUnfolder]: For 66319/66799 co-relation queries the response was YES. [2023-08-30 00:26:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138011 conditions, 35811 events. 19314/35811 cut-off events. For 66319/66799 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 325607 event pairs, 1868 based on Foata normal form. 844/36333 useless extension candidates. Maximal degree in co-relation 137956. Up to 28414 conditions per place. [2023-08-30 00:26:33,519 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 137 selfloop transitions, 46 changer transitions 0/188 dead transitions. [2023-08-30 00:26:33,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 2330 flow [2023-08-30 00:26:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:26:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:26:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 987 transitions. [2023-08-30 00:26:33,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983050847457627 [2023-08-30 00:26:33,522 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 987 transitions. [2023-08-30 00:26:33,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 987 transitions. [2023-08-30 00:26:33,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:33,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 987 transitions. [2023-08-30 00:26:33,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.5) internal successors, (987), 6 states have internal predecessors, (987), 0 states have call successors, (0), 0 states 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 00:26:33,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states 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 00:26:33,525 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states 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 00:26:33,525 INFO L175 Difference]: Start difference. First operand has 142 places, 170 transitions, 1880 flow. Second operand 6 states and 987 transitions. [2023-08-30 00:26:33,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 2330 flow [2023-08-30 00:26:34,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 188 transitions, 2328 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 00:26:34,590 INFO L231 Difference]: Finished difference. Result has 150 places, 178 transitions, 2066 flow [2023-08-30 00:26:34,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2066, PETRI_PLACES=150, PETRI_TRANSITIONS=178} [2023-08-30 00:26:34,594 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2023-08-30 00:26:34,594 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 178 transitions, 2066 flow [2023-08-30 00:26:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 00:26:34,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:34,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:34,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:34,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:34,799 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:26:34,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash 177946782, now seen corresponding path program 2 times [2023-08-30 00:26:34,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:34,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111212122] [2023-08-30 00:26:34,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:26:34,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:34,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:34,801 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:34,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:26:34,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:26:34,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:26:34,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:26:34,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:26:34,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:26:34,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:34,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111212122] [2023-08-30 00:26:34,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111212122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:26:34,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:26:34,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:26:34,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734902154] [2023-08-30 00:26:34,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:26:34,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:26:34,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:26:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:26:34,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 413 [2023-08-30 00:26:34,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 178 transitions, 2066 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:34,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:34,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 413 [2023-08-30 00:26:34,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:42,390 INFO L130 PetriNetUnfolder]: 29352/52119 cut-off events. [2023-08-30 00:26:42,391 INFO L131 PetriNetUnfolder]: For 154210/154774 co-relation queries the response was YES. [2023-08-30 00:26:42,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208847 conditions, 52119 events. 29352/52119 cut-off events. For 154210/154774 co-relation queries the response was YES. Maximal size of possible extension queue 1711. Compared 473844 event pairs, 8416 based on Foata normal form. 780/52661 useless extension candidates. Maximal degree in co-relation 208787. Up to 25129 conditions per place. [2023-08-30 00:26:42,959 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 235 selfloop transitions, 2 changer transitions 2/244 dead transitions. [2023-08-30 00:26:42,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 244 transitions, 3272 flow [2023-08-30 00:26:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:26:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:26:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-30 00:26:42,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519774011299435 [2023-08-30 00:26:42,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-30 00:26:42,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-30 00:26:42,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:42,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-30 00:26:42,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:42,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:26:42,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 00:26:42,964 INFO L175 Difference]: Start difference. First operand has 150 places, 178 transitions, 2066 flow. Second operand 3 states and 560 transitions. [2023-08-30 00:26:42,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 244 transitions, 3272 flow [2023-08-30 00:26:44,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 244 transitions, 3270 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 00:26:44,629 INFO L231 Difference]: Finished difference. Result has 153 places, 178 transitions, 2063 flow [2023-08-30 00:26:44,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2063, PETRI_PLACES=153, PETRI_TRANSITIONS=178} [2023-08-30 00:26:44,630 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2023-08-30 00:26:44,630 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 178 transitions, 2063 flow [2023-08-30 00:26:44,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:44,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:44,631 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:44,638 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 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:44,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:44,836 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:26:44,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1152749730, now seen corresponding path program 1 times [2023-08-30 00:26:44,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:44,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749047018] [2023-08-30 00:26:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:44,837 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 00:26:44,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:44,838 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:44,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:26:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:26:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:44,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:26:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:26:45,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:26:46,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:46,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749047018] [2023-08-30 00:26:46,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749047018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:46,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:46,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:26:46,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961279386] [2023-08-30 00:26:46,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:46,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:26:46,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:26:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:26:53,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 413 [2023-08-30 00:26:53,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 178 transitions, 2063 flow. Second operand has 18 states, 18 states have (on average 157.66666666666666) internal successors, (2838), 18 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states 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 00:26:53,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:53,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 413 [2023-08-30 00:26:53,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:03,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:05,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:09,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:11,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:12,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:14,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:16,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:18,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:27:22,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:24,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:26,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:33,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:27:46,090 INFO L130 PetriNetUnfolder]: 71726/125454 cut-off events. [2023-08-30 00:27:46,091 INFO L131 PetriNetUnfolder]: For 292914/296262 co-relation queries the response was YES. [2023-08-30 00:27:47,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540623 conditions, 125454 events. 71726/125454 cut-off events. For 292914/296262 co-relation queries the response was YES. Maximal size of possible extension queue 2813. Compared 1198178 event pairs, 4317 based on Foata normal form. 8163/132877 useless extension candidates. Maximal degree in co-relation 540560. Up to 27385 conditions per place. [2023-08-30 00:27:48,263 INFO L137 encePairwiseOnDemand]: 405/413 looper letters, 266 selfloop transitions, 134 changer transitions 0/405 dead transitions. [2023-08-30 00:27:48,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 405 transitions, 4267 flow [2023-08-30 00:27:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:27:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:27:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3971 transitions. [2023-08-30 00:27:48,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40062550443906375 [2023-08-30 00:27:48,269 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3971 transitions. [2023-08-30 00:27:48,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3971 transitions. [2023-08-30 00:27:48,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:48,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3971 transitions. [2023-08-30 00:27:48,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.45833333333334) internal successors, (3971), 24 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states 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 00:27:48,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states 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 00:27:48,281 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states 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 00:27:48,281 INFO L175 Difference]: Start difference. First operand has 153 places, 178 transitions, 2063 flow. Second operand 24 states and 3971 transitions. [2023-08-30 00:27:48,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 405 transitions, 4267 flow [2023-08-30 00:27:52,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 405 transitions, 4245 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:27:52,297 INFO L231 Difference]: Finished difference. Result has 181 places, 228 transitions, 3015 flow [2023-08-30 00:27:52,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3015, PETRI_PLACES=181, PETRI_TRANSITIONS=228} [2023-08-30 00:27:52,298 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2023-08-30 00:27:52,298 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 228 transitions, 3015 flow [2023-08-30 00:27:52,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 157.66666666666666) internal successors, (2838), 18 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states 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 00:27:52,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:52,298 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 1, 1, 1] [2023-08-30 00:27:52,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:52,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:52,507 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:27:52,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -496811807, now seen corresponding path program 1 times [2023-08-30 00:27:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:52,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700205268] [2023-08-30 00:27:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:52,508 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 00:27:52,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:52,509 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:52,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:27:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:27:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:52,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:27:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:53,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:58,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700205268] [2023-08-30 00:27:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700205268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:58,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:58,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2023-08-30 00:27:58,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647474676] [2023-08-30 00:27:58,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:58,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 00:27:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:58,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 00:27:58,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 00:28:44,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 00:28:44,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 228 transitions, 3015 flow. Second operand has 34 states, 34 states have (on average 160.02941176470588) internal successors, (5441), 34 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states 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 00:28:44,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:44,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 00:28:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:56,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:28:58,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:00,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:02,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:04,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:06,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:08,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:10,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:12,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:14,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:16,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:18,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:20,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:22,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:29:24,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:30:50,579 INFO L130 PetriNetUnfolder]: 160371/280358 cut-off events. [2023-08-30 00:30:50,580 INFO L131 PetriNetUnfolder]: For 1040133/1047620 co-relation queries the response was YES. [2023-08-30 00:30:54,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318143 conditions, 280358 events. 160371/280358 cut-off events. For 1040133/1047620 co-relation queries the response was YES. Maximal size of possible extension queue 4400. Compared 2858863 event pairs, 97134 based on Foata normal form. 6373/286111 useless extension candidates. Maximal degree in co-relation 1318073. Up to 61270 conditions per place. [2023-08-30 00:30:55,840 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 2968 selfloop transitions, 83 changer transitions 0/3056 dead transitions. [2023-08-30 00:30:55,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 3056 transitions, 46079 flow [2023-08-30 00:30:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 00:30:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 00:30:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6038 transitions. [2023-08-30 00:30:55,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299957271044011 [2023-08-30 00:30:55,870 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6038 transitions. [2023-08-30 00:30:55,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6038 transitions. [2023-08-30 00:30:55,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:55,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6038 transitions. [2023-08-30 00:30:55,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 177.58823529411765) internal successors, (6038), 34 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states 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 00:30:55,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 413.0) internal successors, (14455), 35 states have internal predecessors, (14455), 0 states have call successors, (0), 0 states 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 00:30:55,893 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 413.0) internal successors, (14455), 35 states have internal predecessors, (14455), 0 states have call successors, (0), 0 states 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 00:30:55,893 INFO L175 Difference]: Start difference. First operand has 181 places, 228 transitions, 3015 flow. Second operand 34 states and 6038 transitions. [2023-08-30 00:30:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 3056 transitions, 46079 flow [2023-08-30 00:32:59,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 3056 transitions, 44920 flow, removed 175 selfloop flow, removed 5 redundant places. [2023-08-30 00:32:59,407 INFO L231 Difference]: Finished difference. Result has 227 places, 251 transitions, 3417 flow [2023-08-30 00:32:59,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3417, PETRI_PLACES=227, PETRI_TRANSITIONS=251} [2023-08-30 00:32:59,408 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2023-08-30 00:32:59,408 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 251 transitions, 3417 flow [2023-08-30 00:32:59,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 160.02941176470588) internal successors, (5441), 34 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states 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 00:32:59,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:32:59,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:32:59,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:32:59,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:32:59,617 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 00:32:59,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:32:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1499584401, now seen corresponding path program 1 times [2023-08-30 00:32:59,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:32:59,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062775098] [2023-08-30 00:32:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:32:59,618 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 00:32:59,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:32:59,619 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:32:59,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 00:32:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:32:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:32:59,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:32:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:32:59,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:32:59,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:32:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062775098] [2023-08-30 00:32:59,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062775098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:32:59,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:32:59,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:32:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14770998] [2023-08-30 00:32:59,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:32:59,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:32:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:32:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:32:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:32:59,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 413 [2023-08-30 00:32:59,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 251 transitions, 3417 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 00:32:59,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:32:59,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 413 [2023-08-30 00:32:59,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand