./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-subst.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/chl-node-subst.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 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:52:02,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:52:02,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:52:02,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:52:02,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:52:02,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:52:02,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:52:02,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:52:02,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:52:02,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:52:02,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:52:02,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:52:02,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:52:02,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:52:02,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:52:02,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:52:02,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:52:02,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:52:03,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:52:03,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:52:03,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:52:03,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:52:03,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:52:03,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:52:03,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:52:03,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:52:03,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:52:03,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:52:03,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:52:03,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:52:03,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:52:03,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:52:03,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:52:03,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:52:03,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:52:03,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:52:03,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:52:03,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:52:03,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:52:03,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:52:03,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:52:03,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:52:03,051 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:52:03,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:52:03,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:52:03,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:52:03,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:52:03,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:52:03,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:52:03,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:52:03,054 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:52:03,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:52:03,055 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:52:03,055 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:52:03,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:52:03,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:52:03,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:52:03,056 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:52:03,056 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:52:03,056 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:52:03,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:52:03,056 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:52:03,056 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:52:03,056 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:52:03,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:52:03,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:52:03,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:52:03,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:52:03,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:52:03,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:52:03,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:52:03,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:52:03,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:52:03,058 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:52:03,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:52:03,058 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:52:03,058 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:52:03,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:52:03,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:52:03,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:52:03,289 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:52:03,289 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:52:03,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-08-29 22:52:04,222 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:52:04,408 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:52:04,408 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-08-29 22:52:04,416 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347375821/e5b3098d8e2f4f64985d571f24cd9018/FLAG615538c61 [2023-08-29 22:52:04,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347375821/e5b3098d8e2f4f64985d571f24cd9018 [2023-08-29 22:52:04,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:52:04,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:52:04,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:04,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:52:04,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:52:04,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:04" (1/1) ... [2023-08-29 22:52:04,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1d84d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:04, skipping insertion in model container [2023-08-29 22:52:04,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:04" (1/1) ... [2023-08-29 22:52:04,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:52:04,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:52:04,556 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/chl-node-subst.wvr.c[3996,4009] [2023-08-29 22:52:04,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:04,572 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:52:04,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45f99700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:04, skipping insertion in model container [2023-08-29 22:52:04,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:04,573 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:52:04,574 INFO L158 Benchmark]: Toolchain (without parser) took 146.17ms. Allocated memory is still 83.9MB. Free memory was 62.4MB in the beginning and 51.2MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-29 22:52:04,575 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 65.0MB. Free memory is still 43.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:52:04,575 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.69ms. Allocated memory is still 83.9MB. Free memory was 62.1MB in the beginning and 51.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:52:04,576 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 65.0MB. Free memory is still 43.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.69ms. Allocated memory is still 83.9MB. Free memory was 62.1MB in the beginning and 51.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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/chl-node-subst.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 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:52:05,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:52:05,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:52:05,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:52:05,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:52:05,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:52:05,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:52:05,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:52:05,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:52:05,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:52:05,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:52:05,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:52:05,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:52:05,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:52:05,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:52:05,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:52:05,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:52:05,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:52:05,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:52:05,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:52:05,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:52:05,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:52:05,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:52:05,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:52:05,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:52:05,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:52:05,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:52:05,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:52:05,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:52:05,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:52:05,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:52:05,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:52:05,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:52:05,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:52:05,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:52:05,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:52:05,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:52:05,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:52:05,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:52:05,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:52:05,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:52:05,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:52:05,964 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:52:05,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:52:05,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:52:05,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:52:05,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:52:05,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:52:05,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:52:05,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:52:05,967 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:52:05,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:52:05,968 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:52:05,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:52:05,969 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:52:05,969 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:52:05,969 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:52:05,969 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:52:05,969 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:52:05,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:52:05,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:52:05,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:52:05,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:52:05,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:52:05,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:52:05,970 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:52:05,970 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:52:05,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:52:05,971 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:52:05,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:52:05,971 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:52:05,971 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:52:05,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:52:06,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:52:06,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:52:06,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:52:06,240 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:52:06,240 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:52:06,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-08-29 22:52:07,134 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:52:07,327 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:52:07,327 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-08-29 22:52:07,333 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c7edc02/5a4c7b6b0088442f83a88bd5c6ac7539/FLAG9b77fe1b7 [2023-08-29 22:52:07,345 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c7edc02/5a4c7b6b0088442f83a88bd5c6ac7539 [2023-08-29 22:52:07,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:52:07,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:52:07,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:07,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:52:07,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:52:07,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c0cade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07, skipping insertion in model container [2023-08-29 22:52:07,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:52:07,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:52:07,493 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/chl-node-subst.wvr.c[3996,4009] [2023-08-29 22:52:07,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:07,510 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:52:07,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:52:07,526 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/chl-node-subst.wvr.c[3996,4009] [2023-08-29 22:52:07,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:07,537 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:52:07,558 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/chl-node-subst.wvr.c[3996,4009] [2023-08-29 22:52:07,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:07,573 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:52:07,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07 WrapperNode [2023-08-29 22:52:07,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:07,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:52:07,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:52:07,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:52:07,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,659 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 413 [2023-08-29 22:52:07,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:52:07,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:52:07,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:52:07,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:52:07,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:52:07,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:52:07,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:52:07,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:52:07,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (1/1) ... [2023-08-29 22:52:07,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:52:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:52:07,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:52:07,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:52:07,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:52:07,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-29 22:52:07,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:52:07,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:52:07,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:52:07,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:52:07,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:52:07,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:52:07,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:52:07,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:52:07,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:52:07,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:52:07,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:52:07,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:52:07,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-29 22:52:07,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:52:07,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:52:07,772 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:52:07,890 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:52:07,891 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:52:08,604 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:52:08,619 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:52:08,619 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:52:08,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:52:08 BoogieIcfgContainer [2023-08-29 22:52:08,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:52:08,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:52:08,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:52:08,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:52:08,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:52:07" (1/3) ... [2023-08-29 22:52:08,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d4998b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:52:08, skipping insertion in model container [2023-08-29 22:52:08,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:07" (2/3) ... [2023-08-29 22:52:08,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d4998b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:52:08, skipping insertion in model container [2023-08-29 22:52:08,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:52:08" (3/3) ... [2023-08-29 22:52:08,627 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2023-08-29 22:52:08,637 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:52:08,637 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-08-29 22:52:08,637 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:52:08,745 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:52:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 516 places, 547 transitions, 1118 flow [2023-08-29 22:52:08,904 INFO L130 PetriNetUnfolder]: 41/544 cut-off events. [2023-08-29 22:52:08,904 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:52:08,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 544 events. 41/544 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1006 event pairs, 0 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-08-29 22:52:08,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 547 transitions, 1118 flow [2023-08-29 22:52:08,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 540 transitions, 1098 flow [2023-08-29 22:52:08,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:52:08,930 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 509 places, 540 transitions, 1098 flow [2023-08-29 22:52:08,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 509 places, 540 transitions, 1098 flow [2023-08-29 22:52:08,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 509 places, 540 transitions, 1098 flow [2023-08-29 22:52:09,005 INFO L130 PetriNetUnfolder]: 41/540 cut-off events. [2023-08-29 22:52:09,006 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:52:09,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 540 events. 41/540 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 997 event pairs, 0 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-08-29 22:52:09,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 27258 [2023-08-29 22:53:03,793 INFO L134 LiptonReduction]: Checked pairs total: 51998 [2023-08-29 22:53:03,794 INFO L136 LiptonReduction]: Total number of compositions: 662 [2023-08-29 22:53:03,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:53:03,807 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;@4139352d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:53:03,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-08-29 22:53:03,811 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:53:03,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:53:03,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:03,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:53:03,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:53:03,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash 68331, now seen corresponding path program 1 times [2023-08-29 22:53:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028050614] [2023-08-29 22:53:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:03,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:03,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:03,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:03,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:53:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:53:03,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:04,031 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:53:04,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:53:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:04,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:53:04,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:04,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028050614] [2023-08-29 22:53:04,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028050614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:04,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:04,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:53:04,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554250463] [2023-08-29 22:53:04,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:04,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:53:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:04,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:53:04,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:53:04,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-08-29 22:53:04,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:04,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:04,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-08-29 22:53:04,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:08,378 INFO L130 PetriNetUnfolder]: 28355/39551 cut-off events. [2023-08-29 22:53:08,378 INFO L131 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2023-08-29 22:53:08,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79738 conditions, 39551 events. 28355/39551 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242780 event pairs, 26445 based on Foata normal form. 0/12074 useless extension candidates. Maximal degree in co-relation 76220. Up to 39423 conditions per place. [2023-08-29 22:53:08,577 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-08-29 22:53:08,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 382 flow [2023-08-29 22:53:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:53:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:53:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1585 transitions. [2023-08-29 22:53:08,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700027570995315 [2023-08-29 22:53:08,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1585 transitions. [2023-08-29 22:53:08,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1585 transitions. [2023-08-29 22:53:08,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:08,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1585 transitions. [2023-08-29 22:53:08,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.3333333333334) internal successors, (1585), 3 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:08,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:08,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:08,619 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 224 flow. Second operand 3 states and 1585 transitions. [2023-08-29 22:53:08,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 382 flow [2023-08-29 22:53:08,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 370 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:53:08,635 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 196 flow [2023-08-29 22:53:08,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2023-08-29 22:53:08,640 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2023-08-29 22:53:08,640 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 196 flow [2023-08-29 22:53:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:08,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:08,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:53:08,655 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 [2023-08-29 22:53:08,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:08,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:53:08,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash 68332, now seen corresponding path program 1 times [2023-08-29 22:53:08,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:08,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222190327] [2023-08-29 22:53:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:08,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:08,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:53:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:53:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:09,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:53:09,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:53:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:09,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:53:09,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:09,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222190327] [2023-08-29 22:53:09,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222190327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:09,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:09,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:53:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754091327] [2023-08-29 22:53:09,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:09,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:53:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:53:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:53:09,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 1209 [2023-08-29 22:53:09,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:09,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:09,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 1209 [2023-08-29 22:53:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:12,718 INFO L130 PetriNetUnfolder]: 28358/39557 cut-off events. [2023-08-29 22:53:12,719 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-29 22:53:12,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79297 conditions, 39557 events. 28358/39557 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242760 event pairs, 26445 based on Foata normal form. 0/12077 useless extension candidates. Maximal degree in co-relation 79291. Up to 39425 conditions per place. [2023-08-29 22:53:12,867 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2023-08-29 22:53:12,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 396 flow [2023-08-29 22:53:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:53:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:53:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-08-29 22:53:12,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-08-29 22:53:12,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-08-29 22:53:12,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-08-29 22:53:12,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:12,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-08-29 22:53:12,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:12,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:12,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:12,880 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 196 flow. Second operand 3 states and 1576 transitions. [2023-08-29 22:53:12,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 396 flow [2023-08-29 22:53:12,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 100 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:53:12,883 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 253 flow [2023-08-29 22:53:12,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2023-08-29 22:53:12,883 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2023-08-29 22:53:12,884 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 253 flow [2023-08-29 22:53:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:12,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:12,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:53:12,893 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 (3)] Ended with exit code 0 [2023-08-29 22:53:13,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:13,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:53:13,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2127197, now seen corresponding path program 1 times [2023-08-29 22:53:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:13,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268576720] [2023-08-29 22:53:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:13,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:13,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:13,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:13,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:53:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:53:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:13,234 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:53:13,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:53:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:13,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:13,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:13,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268576720] [2023-08-29 22:53:13,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268576720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:13,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:13,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:53:13,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187409760] [2023-08-29 22:53:13,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:13,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:53:13,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:53:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:53:15,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 1209 [2023-08-29 22:53:15,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:15,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:15,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 1209 [2023-08-29 22:53:15,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:20,719 INFO L130 PetriNetUnfolder]: 28367/39575 cut-off events. [2023-08-29 22:53:20,720 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-29 22:53:20,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79381 conditions, 39575 events. 28367/39575 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 242729 event pairs, 26445 based on Foata normal form. 0/12096 useless extension candidates. Maximal degree in co-relation 79372. Up to 39420 conditions per place. [2023-08-29 22:53:20,905 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 86 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2023-08-29 22:53:20,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 118 transitions, 561 flow [2023-08-29 22:53:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:53:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:53:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2989 transitions. [2023-08-29 22:53:20,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41204852495175076 [2023-08-29 22:53:20,911 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2989 transitions. [2023-08-29 22:53:20,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2989 transitions. [2023-08-29 22:53:20,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:20,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2989 transitions. [2023-08-29 22:53:20,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 498.1666666666667) internal successors, (2989), 6 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:20,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:20,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:20,927 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 253 flow. Second operand 6 states and 2989 transitions. [2023-08-29 22:53:20,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 118 transitions, 561 flow [2023-08-29 22:53:20,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 118 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:53:20,933 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 420 flow [2023-08-29 22:53:20,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2023-08-29 22:53:20,934 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2023-08-29 22:53:20,935 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 420 flow [2023-08-29 22:53:20,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:20,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:20,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:53:20,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-29 22:53:21,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:21,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:53:21,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759497, now seen corresponding path program 1 times [2023-08-29 22:53:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:21,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345217413] [2023-08-29 22:53:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:21,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:21,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:21,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:21,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:53:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:53:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:21,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:53:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:21,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:53:21,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:21,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345217413] [2023-08-29 22:53:21,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345217413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:21,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:21,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:53:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251894707] [2023-08-29 22:53:21,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:21,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:53:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:53:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:53:21,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-08-29 22:53:21,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 420 flow. Second operand has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:21,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:21,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-08-29 22:53:21,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:24,664 INFO L130 PetriNetUnfolder]: 28367/39572 cut-off events. [2023-08-29 22:53:24,665 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-08-29 22:53:24,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79422 conditions, 39572 events. 28367/39572 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242802 event pairs, 26445 based on Foata normal form. 0/12100 useless extension candidates. Maximal degree in co-relation 79410. Up to 39415 conditions per place. [2023-08-29 22:53:24,799 INFO L137 encePairwiseOnDemand]: 1205/1209 looper letters, 104 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2023-08-29 22:53:24,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 632 flow [2023-08-29 22:53:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:53:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:53:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-08-29 22:53:24,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-08-29 22:53:24,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-08-29 22:53:24,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-08-29 22:53:24,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:24,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-08-29 22:53:24,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:24,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:24,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:24,810 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 420 flow. Second operand 3 states and 1576 transitions. [2023-08-29 22:53:24,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 632 flow [2023-08-29 22:53:24,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 115 transitions, 595 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-29 22:53:24,813 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 387 flow [2023-08-29 22:53:24,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-08-29 22:53:24,813 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:53:24,814 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 387 flow [2023-08-29 22:53:24,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:24,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:24,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:53:24,823 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 (5)] Ended with exit code 0 [2023-08-29 22:53:25,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:25,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:53:25,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759495, now seen corresponding path program 1 times [2023-08-29 22:53:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:25,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442649070] [2023-08-29 22:53:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:25,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:25,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:25,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:53:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:53:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:25,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:53:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:25,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:53:25,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442649070] [2023-08-29 22:53:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442649070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:25,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:25,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:53:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203675509] [2023-08-29 22:53:25,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:25,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:53:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:53:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:53:25,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1209 [2023-08-29 22:53:25,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:25,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:25,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1209 [2023-08-29 22:53:25,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:28,881 INFO L130 PetriNetUnfolder]: 28368/39574 cut-off events. [2023-08-29 22:53:28,881 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-08-29 22:53:28,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79413 conditions, 39574 events. 28368/39574 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242815 event pairs, 26445 based on Foata normal form. 0/12105 useless extension candidates. Maximal degree in co-relation 79401. Up to 39441 conditions per place. [2023-08-29 22:53:29,076 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 103 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-08-29 22:53:29,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 616 flow [2023-08-29 22:53:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:53:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:53:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2052 transitions. [2023-08-29 22:53:29,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42431761786600497 [2023-08-29 22:53:29,080 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2052 transitions. [2023-08-29 22:53:29,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2052 transitions. [2023-08-29 22:53:29,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:29,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2052 transitions. [2023-08-29 22:53:29,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:29,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:29,088 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:29,088 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 387 flow. Second operand 4 states and 2052 transitions. [2023-08-29 22:53:29,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 616 flow [2023-08-29 22:53:29,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 117 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:53:29,091 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 418 flow [2023-08-29 22:53:29,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=418, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2023-08-29 22:53:29,091 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -2 predicate places. [2023-08-29 22:53:29,091 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 418 flow [2023-08-29 22:53:29,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:29,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:29,092 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:53:29,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:53:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:29,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:53:29,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1044340948, now seen corresponding path program 2 times [2023-08-29 22:53:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:29,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991058810] [2023-08-29 22:53:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:53:29,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:29,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:29,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:53:29,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:53:29,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:53:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:53:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:29,471 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:53:29,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:53:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:29,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:29,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:29,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991058810] [2023-08-29 22:53:29,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991058810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:29,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:29,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:53:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226824788] [2023-08-29 22:53:29,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:29,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:53:29,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:29,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:53:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:53:37,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1209 [2023-08-29 22:53:37,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 418 flow. Second operand has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:37,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:37,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1209 [2023-08-29 22:53:37,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:39,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:41,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:44,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:46,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:47,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:50,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:51,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:53,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:54,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:56,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:02,669 INFO L130 PetriNetUnfolder]: 28388/39615 cut-off events. [2023-08-29 22:54:02,669 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-29 22:54:02,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79592 conditions, 39615 events. 28388/39615 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243189 event pairs, 26445 based on Foata normal form. 18/12151 useless extension candidates. Maximal degree in co-relation 79578. Up to 39421 conditions per place. [2023-08-29 22:54:02,827 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 87 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2023-08-29 22:54:02,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 984 flow [2023-08-29 22:54:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:54:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:54:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5938 transitions. [2023-08-29 22:54:02,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929142542045766 [2023-08-29 22:54:02,837 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5938 transitions. [2023-08-29 22:54:02,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5938 transitions. [2023-08-29 22:54:02,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:02,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5938 transitions. [2023-08-29 22:54:02,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 494.8333333333333) internal successors, (5938), 12 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:02,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:02,858 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:02,858 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 418 flow. Second operand 12 states and 5938 transitions. [2023-08-29 22:54:02,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 984 flow [2023-08-29 22:54:02,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 963 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 22:54:02,862 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 890 flow [2023-08-29 22:54:02,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=890, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2023-08-29 22:54:02,863 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 13 predicate places. [2023-08-29 22:54:02,863 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 890 flow [2023-08-29 22:54:02,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:02,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:02,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:54:02,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:03,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:03,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash -974956327, now seen corresponding path program 1 times [2023-08-29 22:54:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:03,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29907329] [2023-08-29 22:54:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:03,079 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 [2023-08-29 22:54:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:03,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:03,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:54:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:03,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:54:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:03,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:54:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:03,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:03,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:03,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29907329] [2023-08-29 22:54:03,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29907329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:03,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:03,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 22:54:03,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768896701] [2023-08-29 22:54:03,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:03,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:54:03,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:54:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:54:05,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1209 [2023-08-29 22:54:05,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:05,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:05,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1209 [2023-08-29 22:54:05,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:11,869 INFO L130 PetriNetUnfolder]: 28402/39639 cut-off events. [2023-08-29 22:54:11,869 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-08-29 22:54:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79801 conditions, 39639 events. 28402/39639 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243611 event pairs, 26445 based on Foata normal form. 0/12159 useless extension candidates. Maximal degree in co-relation 79781. Up to 39423 conditions per place. [2023-08-29 22:54:12,134 INFO L137 encePairwiseOnDemand]: 1196/1209 looper letters, 134 selfloop transitions, 36 changer transitions 0/176 dead transitions. [2023-08-29 22:54:12,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1326 flow [2023-08-29 22:54:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:54:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:54:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3444 transitions. [2023-08-29 22:54:12,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694789081885857 [2023-08-29 22:54:12,141 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3444 transitions. [2023-08-29 22:54:12,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3444 transitions. [2023-08-29 22:54:12,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:12,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3444 transitions. [2023-08-29 22:54:12,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:12,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:12,153 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:12,153 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 890 flow. Second operand 7 states and 3444 transitions. [2023-08-29 22:54:12,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1326 flow [2023-08-29 22:54:12,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1175 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-08-29 22:54:12,157 INFO L231 Difference]: Finished difference. Result has 121 places, 176 transitions, 975 flow [2023-08-29 22:54:12,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=975, PETRI_PLACES=121, PETRI_TRANSITIONS=176} [2023-08-29 22:54:12,158 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-08-29 22:54:12,158 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 176 transitions, 975 flow [2023-08-29 22:54:12,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:12,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:12,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:54:12,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-29 22:54:12,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:12,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:12,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash -158725351, now seen corresponding path program 1 times [2023-08-29 22:54:12,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:12,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774956802] [2023-08-29 22:54:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:12,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:12,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:12,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:12,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:54:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:54:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:12,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:54:12,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774956802] [2023-08-29 22:54:12,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774956802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:54:12,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:54:12,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:54:12,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791238386] [2023-08-29 22:54:12,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:54:12,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:54:12,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:12,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:54:12,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:54:12,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 1209 [2023-08-29 22:54:12,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 176 transitions, 975 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:12,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:12,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 1209 [2023-08-29 22:54:12,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:16,112 INFO L130 PetriNetUnfolder]: 28401/39638 cut-off events. [2023-08-29 22:54:16,112 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-08-29 22:54:16,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79800 conditions, 39638 events. 28401/39638 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243725 event pairs, 26445 based on Foata normal form. 1/12173 useless extension candidates. Maximal degree in co-relation 79776. Up to 39510 conditions per place. [2023-08-29 22:54:16,308 INFO L137 encePairwiseOnDemand]: 1206/1209 looper letters, 167 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2023-08-29 22:54:16,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1309 flow [2023-08-29 22:54:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:54:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:54:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1584 transitions. [2023-08-29 22:54:16,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43672456575682383 [2023-08-29 22:54:16,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1584 transitions. [2023-08-29 22:54:16,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1584 transitions. [2023-08-29 22:54:16,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:16,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1584 transitions. [2023-08-29 22:54:16,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,316 INFO L175 Difference]: Start difference. First operand has 121 places, 176 transitions, 975 flow. Second operand 3 states and 1584 transitions. [2023-08-29 22:54:16,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1309 flow [2023-08-29 22:54:16,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1274 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-29 22:54:16,321 INFO L231 Difference]: Finished difference. Result has 121 places, 175 transitions, 940 flow [2023-08-29 22:54:16,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=940, PETRI_PLACES=121, PETRI_TRANSITIONS=175} [2023-08-29 22:54:16,323 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-08-29 22:54:16,323 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 175 transitions, 940 flow [2023-08-29 22:54:16,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:16,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:54:16,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:16,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:16,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:16,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -732922040, now seen corresponding path program 1 times [2023-08-29 22:54:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841665025] [2023-08-29 22:54:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:16,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:16,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:54:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:54:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:16,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:16,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:16,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841665025] [2023-08-29 22:54:16,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841665025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:16,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:16,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:54:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541616943] [2023-08-29 22:54:16,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:16,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:54:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:54:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:54:18,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-08-29 22:54:18,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 175 transitions, 940 flow. Second operand has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:18,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:18,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-08-29 22:54:18,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:25,962 INFO L130 PetriNetUnfolder]: 56787/79249 cut-off events. [2023-08-29 22:54:25,962 INFO L131 PetriNetUnfolder]: For 643/643 co-relation queries the response was YES. [2023-08-29 22:54:26,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159398 conditions, 79249 events. 56787/79249 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 3666. Compared 529288 event pairs, 52890 based on Foata normal form. 4/24321 useless extension candidates. Maximal degree in co-relation 159373. Up to 39490 conditions per place. [2023-08-29 22:54:26,459 INFO L137 encePairwiseOnDemand]: 1200/1209 looper letters, 277 selfloop transitions, 34 changer transitions 0/317 dead transitions. [2023-08-29 22:54:26,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 317 transitions, 2276 flow [2023-08-29 22:54:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:54:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:54:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4430 transitions. [2023-08-29 22:54:26,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071316974542781 [2023-08-29 22:54:26,468 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4430 transitions. [2023-08-29 22:54:26,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4430 transitions. [2023-08-29 22:54:26,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:26,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4430 transitions. [2023-08-29 22:54:26,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 492.22222222222223) internal successors, (4430), 9 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:26,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:26,487 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:26,487 INFO L175 Difference]: Start difference. First operand has 121 places, 175 transitions, 940 flow. Second operand 9 states and 4430 transitions. [2023-08-29 22:54:26,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 317 transitions, 2276 flow [2023-08-29 22:54:26,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 317 transitions, 2272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:54:26,494 INFO L231 Difference]: Finished difference. Result has 128 places, 188 transitions, 1133 flow [2023-08-29 22:54:26,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1133, PETRI_PLACES=128, PETRI_TRANSITIONS=188} [2023-08-29 22:54:26,495 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 25 predicate places. [2023-08-29 22:54:26,495 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 188 transitions, 1133 flow [2023-08-29 22:54:26,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:26,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:26,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:54:26,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-29 22:54:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:26,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:26,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:26,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1249966372, now seen corresponding path program 1 times [2023-08-29 22:54:26,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941707283] [2023-08-29 22:54:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:26,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:26,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:26,705 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:26,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:54:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:54:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:54:26,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:54:26,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:26,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941707283] [2023-08-29 22:54:26,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941707283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:54:26,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:54:26,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:54:26,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765233540] [2023-08-29 22:54:26,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:54:26,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:54:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:54:26,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:54:26,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1209 [2023-08-29 22:54:26,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 188 transitions, 1133 flow. Second operand has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:26,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:26,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1209 [2023-08-29 22:54:26,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:34,517 INFO L130 PetriNetUnfolder]: 56785/79247 cut-off events. [2023-08-29 22:54:34,517 INFO L131 PetriNetUnfolder]: For 750/750 co-relation queries the response was YES. [2023-08-29 22:54:34,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159428 conditions, 79247 events. 56785/79247 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 3847. Compared 531651 event pairs, 52890 based on Foata normal form. 2/24317 useless extension candidates. Maximal degree in co-relation 159402. Up to 78980 conditions per place. [2023-08-29 22:54:34,995 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 168 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2023-08-29 22:54:34,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 1491 flow [2023-08-29 22:54:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:54:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:54:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2076 transitions. [2023-08-29 22:54:34,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292803970223325 [2023-08-29 22:54:34,999 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2076 transitions. [2023-08-29 22:54:34,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2076 transitions. [2023-08-29 22:54:35,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:35,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2076 transitions. [2023-08-29 22:54:35,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:35,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:35,006 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:35,006 INFO L175 Difference]: Start difference. First operand has 128 places, 188 transitions, 1133 flow. Second operand 4 states and 2076 transitions. [2023-08-29 22:54:35,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 1491 flow [2023-08-29 22:54:35,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 1486 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:54:35,012 INFO L231 Difference]: Finished difference. Result has 129 places, 187 transitions, 1150 flow [2023-08-29 22:54:35,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1150, PETRI_PLACES=129, PETRI_TRANSITIONS=187} [2023-08-29 22:54:35,013 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 26 predicate places. [2023-08-29 22:54:35,013 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 187 transitions, 1150 flow [2023-08-29 22:54:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:35,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:35,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:54:35,020 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 (11)] Ended with exit code 0 [2023-08-29 22:54:35,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:35,220 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:35,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash -5232254, now seen corresponding path program 1 times [2023-08-29 22:54:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:35,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896570489] [2023-08-29 22:54:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:35,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:35,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:35,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:35,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:54:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:54:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:54:35,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:54:35,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:35,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896570489] [2023-08-29 22:54:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896570489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:35,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:35,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-08-29 22:54:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643596424] [2023-08-29 22:54:35,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:54:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:54:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:54:37,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-08-29 22:54:37,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 187 transitions, 1150 flow. Second operand has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:37,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:37,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-08-29 22:54:37,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:53,203 INFO L130 PetriNetUnfolder]: 113535/158423 cut-off events. [2023-08-29 22:54:53,203 INFO L131 PetriNetUnfolder]: For 1383/1383 co-relation queries the response was YES. [2023-08-29 22:54:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318534 conditions, 158423 events. 113535/158423 cut-off events. For 1383/1383 co-relation queries the response was YES. Maximal size of possible extension queue 7137. Compared 1149811 event pairs, 105780 based on Foata normal form. 4/48563 useless extension candidates. Maximal degree in co-relation 318508. Up to 78951 conditions per place. [2023-08-29 22:54:54,219 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 271 selfloop transitions, 44 changer transitions 0/321 dead transitions. [2023-08-29 22:54:54,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 321 transitions, 2557 flow [2023-08-29 22:54:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:54:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:54:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4427 transitions. [2023-08-29 22:54:54,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068559875011488 [2023-08-29 22:54:54,225 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4427 transitions. [2023-08-29 22:54:54,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4427 transitions. [2023-08-29 22:54:54,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:54,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4427 transitions. [2023-08-29 22:54:54,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 491.8888888888889) internal successors, (4427), 9 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:54,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:54,236 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:54,236 INFO L175 Difference]: Start difference. First operand has 129 places, 187 transitions, 1150 flow. Second operand 9 states and 4427 transitions. [2023-08-29 22:54:54,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 321 transitions, 2557 flow [2023-08-29 22:54:54,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 321 transitions, 2556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:54:54,244 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 1381 flow [2023-08-29 22:54:54,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2023-08-29 22:54:54,245 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2023-08-29 22:54:54,245 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 1381 flow [2023-08-29 22:54:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:54,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:54,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:54:54,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:54,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:54,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:54,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash -162261576, now seen corresponding path program 1 times [2023-08-29 22:54:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:54,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120854949] [2023-08-29 22:54:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:54,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:54,462 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:54,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:54:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:54:54,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:54,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:54:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:54:54,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:54:54,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:54,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120854949] [2023-08-29 22:54:54,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120854949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:54,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:54,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2023-08-29 22:54:54,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589701050] [2023-08-29 22:54:54,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:54,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 22:54:54,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 22:54:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:54:59,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1209 [2023-08-29 22:54:59,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 481.22222222222223) internal successors, (4331), 9 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:59,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:59,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1209 [2023-08-29 22:54:59,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:00,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:55:01,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:55:04,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:55:54,735 INFO L130 PetriNetUnfolder]: 340331/474687 cut-off events. [2023-08-29 22:55:54,735 INFO L131 PetriNetUnfolder]: For 2679/2679 co-relation queries the response was YES. [2023-08-29 22:55:56,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952611 conditions, 474687 events. 340331/474687 cut-off events. For 2679/2679 co-relation queries the response was YES. Maximal size of possible extension queue 19858. Compared 3833780 event pairs, 317340 based on Foata normal form. 20/145155 useless extension candidates. Maximal degree in co-relation 952584. Up to 157680 conditions per place. [2023-08-29 22:55:58,329 INFO L137 encePairwiseOnDemand]: 1197/1209 looper letters, 265 selfloop transitions, 70 changer transitions 0/341 dead transitions. [2023-08-29 22:55:58,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 341 transitions, 2374 flow [2023-08-29 22:55:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:55:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:55:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4557 transitions. [2023-08-29 22:55:58,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2023-08-29 22:55:58,336 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4557 transitions. [2023-08-29 22:55:58,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4557 transitions. [2023-08-29 22:55:58,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:58,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4557 transitions. [2023-08-29 22:55:58,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 506.3333333333333) internal successors, (4557), 9 states have internal predecessors, (4557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:58,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:58,346 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:58,346 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 1381 flow. Second operand 9 states and 4557 transitions. [2023-08-29 22:55:58,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 341 transitions, 2374 flow [2023-08-29 22:55:58,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 341 transitions, 2354 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 22:55:58,354 INFO L231 Difference]: Finished difference. Result has 147 places, 213 transitions, 1716 flow [2023-08-29 22:55:58,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1716, PETRI_PLACES=147, PETRI_TRANSITIONS=213} [2023-08-29 22:55:58,354 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 44 predicate places. [2023-08-29 22:55:58,354 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 213 transitions, 1716 flow [2023-08-29 22:55:58,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 481.22222222222223) internal successors, (4331), 9 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:58,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:58,355 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:58,363 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 [2023-08-29 22:55:58,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:58,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:55:58,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -166560401, now seen corresponding path program 1 times [2023-08-29 22:55:58,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:55:58,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007144381] [2023-08-29 22:55:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:58,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:55:58,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:55:58,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:55:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:55:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:58,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:55:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:55:58,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:55:59,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:55:59,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007144381] [2023-08-29 22:55:59,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007144381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:59,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:59,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:55:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925999819] [2023-08-29 22:55:59,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:59,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:55:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:55:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:55:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:56:10,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1209 [2023-08-29 22:56:10,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 213 transitions, 1716 flow. Second operand has 13 states, 13 states have (on average 480.6923076923077) internal successors, (6249), 13 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:10,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:10,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1209 [2023-08-29 22:56:10,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:12,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:14,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:18,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:19,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:20,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:21,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:22,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:24,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:25,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:27,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:29,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:30,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:32,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:33,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:35,404 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 []