./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:47:08,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:47:08,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:47:08,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:47:08,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:47:08,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:47:08,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:47:08,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:47:08,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:47:08,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:47:08,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:47:08,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:47:08,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:47:08,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:47:08,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:47:08,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:47:08,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:47:08,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:47:08,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:47:08,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:47:08,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:47:08,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:47:08,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:47:08,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:47:08,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:47:08,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:47:08,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:47:08,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:47:08,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:47:08,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:47:08,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:47:08,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:47:08,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:47:08,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:47:08,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:47:08,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:47:08,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:47:08,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:47:08,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:47:08,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:47:08,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:47:08,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:47:08,940 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:47:08,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:47:08,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:47:08,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:47:08,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:47:08,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:47:08,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:47:08,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:47:08,944 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:47:08,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:47:08,945 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:47:08,945 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:47:08,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:47:08,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:47:08,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:47:08,946 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:47:08,946 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:47:08,946 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:47:08,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:47:08,947 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:47:08,947 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:47:08,947 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:47:08,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:47:08,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:47:08,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:47:08,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:47:08,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:47:08,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:47:08,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:47:08,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:47:08,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:47:08,949 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:47:08,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:47:08,950 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:47:08,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:47:09,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:47:09,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:47:09,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:47:09,272 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:47:09,273 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:47:09,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 06:47:10,354 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:47:10,537 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:47:10,537 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 06:47:10,543 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886a170fa/1edd2789b20c4e418f70a6a3d9673ad6/FLAGd47a335d6 [2023-08-30 06:47:10,556 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886a170fa/1edd2789b20c4e418f70a6a3d9673ad6 [2023-08-30 06:47:10,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:47:10,559 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:47:10,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:47:10,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:47:10,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:47:10,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:47:10" (1/1) ... [2023-08-30 06:47:10,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63dcb40b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:10, skipping insertion in model container [2023-08-30 06:47:10,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:47:10" (1/1) ... [2023-08-30 06:47:10,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:47:10,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:47:10,763 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 06:47:10,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:47:10,785 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:47:10,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e866655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:10, skipping insertion in model container [2023-08-30 06:47:10,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:47:10,788 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:47:10,789 INFO L158 Benchmark]: Toolchain (without parser) took 229.21ms. Allocated memory is still 69.2MB. Free memory was 42.9MB in the beginning and 48.7MB in the end (delta: -5.8MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2023-08-30 06:47:10,790 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 34.8MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:47:10,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.41ms. Allocated memory is still 69.2MB. Free memory was 42.8MB in the beginning and 48.7MB in the end (delta: -5.9MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2023-08-30 06:47:10,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 34.8MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.41ms. Allocated memory is still 69.2MB. Free memory was 42.8MB in the beginning and 48.7MB in the end (delta: -5.9MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:47:12,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:47:12,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:47:12,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:47:12,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:47:12,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:47:12,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:47:12,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:47:12,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:47:12,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:47:12,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:47:12,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:47:12,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:47:12,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:47:12,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:47:12,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:47:12,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:47:12,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:47:12,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:47:12,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:47:12,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:47:12,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:47:12,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:47:12,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:47:12,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:47:12,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:47:12,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:47:12,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:47:12,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:47:12,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:47:12,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:47:12,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:47:12,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:47:12,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:47:12,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:47:12,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:47:12,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:47:12,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:47:12,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:47:12,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:47:12,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:47:12,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:47:12,613 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:47:12,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:47:12,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:47:12,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:47:12,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:47:12,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:47:12,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:47:12,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:47:12,616 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:47:12,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:47:12,617 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:47:12,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:47:12,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:47:12,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:47:12,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:47:12,618 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:47:12,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:47:12,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:47:12,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:47:12,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:47:12,619 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:47:12,619 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:47:12,619 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:47:12,620 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:47:12,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:47:12,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:47:12,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:47:12,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:47:12,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:47:12,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:47:12,621 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:47:12,621 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:47:12,621 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:47:12,622 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:47:12,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:47:12,622 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:47:12,622 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:47:12,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:47:12,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:47:12,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:47:12,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:47:12,964 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:47:12,964 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:47:12,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 06:47:14,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:47:14,285 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:47:14,286 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 06:47:14,295 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef64a7a6/bce378c946d84cf18f0053b4cb0c2acf/FLAG760aa080f [2023-08-30 06:47:14,316 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef64a7a6/bce378c946d84cf18f0053b4cb0c2acf [2023-08-30 06:47:14,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:47:14,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:47:14,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:47:14,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:47:14,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:47:14,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6805610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14, skipping insertion in model container [2023-08-30 06:47:14,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:47:14,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:47:14,527 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 06:47:14,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:47:14,559 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:47:14,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:47:14,590 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 06:47:14,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:47:14,606 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:47:14,639 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 06:47:14,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:47:14,654 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:47:14,655 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:47:14,665 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:47:14,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14 WrapperNode [2023-08-30 06:47:14,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:47:14,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:47:14,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:47:14,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:47:14,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,723 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-08-30 06:47:14,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:47:14,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:47:14,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:47:14,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:47:14,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:47:14,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:47:14,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:47:14,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:47:14,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (1/1) ... [2023-08-30 06:47:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:47:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:47:14,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:47:14,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:47:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:47:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:47:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:47:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:47:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:47:14,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:47:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:47:14,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:47:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:47:14,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:47:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:47:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:47:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:47:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:47:14,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:47:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:47:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:47:14,825 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:47:14,943 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:47:14,945 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:47:15,385 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:47:15,453 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:47:15,453 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 06:47:15,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:47:15 BoogieIcfgContainer [2023-08-30 06:47:15,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:47:15,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:47:15,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:47:15,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:47:15,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:47:14" (1/3) ... [2023-08-30 06:47:15,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a653c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:47:15, skipping insertion in model container [2023-08-30 06:47:15,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:47:14" (2/3) ... [2023-08-30 06:47:15,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a653c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:47:15, skipping insertion in model container [2023-08-30 06:47:15,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:47:15" (3/3) ... [2023-08-30 06:47:15,462 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2023-08-30 06:47:15,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:47:15,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 06:47:15,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:47:15,556 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:47:15,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 168 transitions, 360 flow [2023-08-30 06:47:15,671 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-30 06:47:15,671 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:47:15,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 10/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-08-30 06:47:15,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 168 transitions, 360 flow [2023-08-30 06:47:15,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 161 transitions, 340 flow [2023-08-30 06:47:15,688 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:47:15,695 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 161 transitions, 340 flow [2023-08-30 06:47:15,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 161 transitions, 340 flow [2023-08-30 06:47:15,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 161 transitions, 340 flow [2023-08-30 06:47:15,758 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-30 06:47:15,759 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:47:15,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 161 events. 10/161 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-08-30 06:47:15,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2023-08-30 06:47:34,179 INFO L134 LiptonReduction]: Checked pairs total: 2488 [2023-08-30 06:47:34,179 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-30 06:47:34,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:47:34,196 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;@2a022dae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:47:34,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 06:47:34,199 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:47:34,199 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:47:34,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:34,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:47:34,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:34,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash 20859, now seen corresponding path program 1 times [2023-08-30 06:47:34,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:34,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081504451] [2023-08-30 06:47:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:34,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:34,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:47:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:47:34,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:34,434 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:47:34,446 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 [2023-08-30 06:47:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:34,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:34,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081504451] [2023-08-30 06:47:34,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081504451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:34,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:34,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:34,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928248459] [2023-08-30 06:47:34,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:34,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:34,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:47:34,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:34,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:34,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:47:34,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:34,962 INFO L130 PetriNetUnfolder]: 1098/1474 cut-off events. [2023-08-30 06:47:34,962 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 06:47:34,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3023 conditions, 1474 events. 1098/1474 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6057 event pairs, 584 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 2711. Up to 1469 conditions per place. [2023-08-30 06:47:34,975 INFO L137 encePairwiseOnDemand]: 323/333 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 06:47:34,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 174 flow [2023-08-30 06:47:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:47:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:47:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-30 06:47:34,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47047047047047047 [2023-08-30 06:47:34,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-30 06:47:34,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-30 06:47:34,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:34,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-30 06:47:34,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,003 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 116 flow. Second operand 3 states and 470 transitions. [2023-08-30 06:47:35,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 174 flow [2023-08-30 06:47:35,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:47:35,009 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 88 flow [2023-08-30 06:47:35,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-30 06:47:35,014 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-30 06:47:35,014 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 88 flow [2023-08-30 06:47:35,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:35,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:47:35,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:35,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:35,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:35,226 INFO L85 PathProgramCache]: Analyzing trace with hash 20920, now seen corresponding path program 1 times [2023-08-30 06:47:35,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:35,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480954530] [2023-08-30 06:47:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:35,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:35,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:35,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:35,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:47:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:35,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:47:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:35,406 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:35,406 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 [2023-08-30 06:47:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:35,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:35,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:35,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480954530] [2023-08-30 06:47:35,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480954530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:35,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:35,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:35,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891541792] [2023-08-30 06:47:35,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:35,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:35,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:35,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 06:47:35,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:35,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 06:47:35,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:35,813 INFO L130 PetriNetUnfolder]: 1098/1473 cut-off events. [2023-08-30 06:47:35,813 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:47:35,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2976 conditions, 1473 events. 1098/1473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6038 event pairs, 584 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 2970. Up to 1468 conditions per place. [2023-08-30 06:47:35,823 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 06:47:35,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 160 flow [2023-08-30 06:47:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:47:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:47:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 06:47:35,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45845845845845845 [2023-08-30 06:47:35,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 06:47:35,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 06:47:35,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:35,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 06:47:35,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,832 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 88 flow. Second operand 3 states and 458 transitions. [2023-08-30 06:47:35,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 160 flow [2023-08-30 06:47:35,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:47:35,833 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 87 flow [2023-08-30 06:47:35,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-30 06:47:35,834 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-30 06:47:35,835 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 87 flow [2023-08-30 06:47:35,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:35,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:35,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:47:35,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:36,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:36,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 20924, now seen corresponding path program 1 times [2023-08-30 06:47:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174284518] [2023-08-30 06:47:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:36,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:36,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:36,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:47:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:36,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:47:36,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:36,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:36,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174284518] [2023-08-30 06:47:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174284518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:36,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:36,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264172295] [2023-08-30 06:47:36,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:36,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:36,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 333 [2023-08-30 06:47:36,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:36,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:36,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 333 [2023-08-30 06:47:36,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:36,499 INFO L130 PetriNetUnfolder]: 1098/1475 cut-off events. [2023-08-30 06:47:36,499 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:47:36,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 1475 events. 1098/1475 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6041 event pairs, 584 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 2974. Up to 1469 conditions per place. [2023-08-30 06:47:36,507 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 06:47:36,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 169 flow [2023-08-30 06:47:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:47:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:47:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-30 06:47:36,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47147147147147145 [2023-08-30 06:47:36,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-30 06:47:36,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-30 06:47:36,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:36,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-30 06:47:36,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:36,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:36,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:36,514 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 87 flow. Second operand 3 states and 471 transitions. [2023-08-30 06:47:36,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 169 flow [2023-08-30 06:47:36,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:47:36,518 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 102 flow [2023-08-30 06:47:36,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-30 06:47:36,520 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-30 06:47:36,520 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 102 flow [2023-08-30 06:47:36,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:36,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:36,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:47:36,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:36,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:36,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 20860, now seen corresponding path program 1 times [2023-08-30 06:47:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911233682] [2023-08-30 06:47:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:36,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:36,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:36,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:47:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:47:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:36,883 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:36,884 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 [2023-08-30 06:47:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:36,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:36,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:36,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911233682] [2023-08-30 06:47:36,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911233682] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:36,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:36,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367749829] [2023-08-30 06:47:36,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:36,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:37,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:47:37,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:37,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:47:37,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:37,355 INFO L130 PetriNetUnfolder]: 1098/1474 cut-off events. [2023-08-30 06:47:37,355 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:47:37,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 1474 events. 1098/1474 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6046 event pairs, 584 based on Foata normal form. 1/521 useless extension candidates. Maximal degree in co-relation 2978. Up to 1469 conditions per place. [2023-08-30 06:47:37,363 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 06:47:37,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 178 flow [2023-08-30 06:47:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:47:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:47:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 06:47:37,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2023-08-30 06:47:37,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 06:47:37,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 06:47:37,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:37,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 06:47:37,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,369 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 102 flow. Second operand 3 states and 462 transitions. [2023-08-30 06:47:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 178 flow [2023-08-30 06:47:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 06:47:37,371 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 106 flow [2023-08-30 06:47:37,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-30 06:47:37,372 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2023-08-30 06:47:37,372 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 106 flow [2023-08-30 06:47:37,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:37,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:47:37,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:37,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:37,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 648798, now seen corresponding path program 1 times [2023-08-30 06:47:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:37,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608992774] [2023-08-30 06:47:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:37,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:37,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:47:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:37,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:47:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:37,741 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-08-30 06:47:37,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2023-08-30 06:47:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:47:37,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:37,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608992774] [2023-08-30 06:47:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608992774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:37,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:37,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:37,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555675948] [2023-08-30 06:47:37,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:37,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:37,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:37,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:47:37,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:37,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:47:37,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:38,195 INFO L130 PetriNetUnfolder]: 913/1238 cut-off events. [2023-08-30 06:47:38,195 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:47:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 1238 events. 913/1238 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4995 event pairs, 479 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 2506. Up to 1233 conditions per place. [2023-08-30 06:47:38,201 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 06:47:38,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 172 flow [2023-08-30 06:47:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:47:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:47:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-30 06:47:38,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46046046046046046 [2023-08-30 06:47:38,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-30 06:47:38,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-30 06:47:38,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:38,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-30 06:47:38,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:38,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:38,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:38,208 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 106 flow. Second operand 3 states and 460 transitions. [2023-08-30 06:47:38,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 172 flow [2023-08-30 06:47:38,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:47:38,210 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 98 flow [2023-08-30 06:47:38,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-30 06:47:38,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-30 06:47:38,211 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 98 flow [2023-08-30 06:47:38,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:38,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:38,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:47:38,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:38,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:38,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:38,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 648795, now seen corresponding path program 1 times [2023-08-30 06:47:38,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:38,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784849604] [2023-08-30 06:47:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:38,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:38,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:47:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:47:38,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:38,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:38,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:38,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:38,624 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 06:47:38,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 06:47:38,645 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:47:38,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:47:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:38,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:39,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:39,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784849604] [2023-08-30 06:47:39,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784849604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:39,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:39,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:47:39,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670067438] [2023-08-30 06:47:39,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:39,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:47:39,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:47:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:47:39,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:47:39,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:39,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:39,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:47:39,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:40,488 INFO L130 PetriNetUnfolder]: 1633/2234 cut-off events. [2023-08-30 06:47:40,489 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:47:40,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4542 conditions, 2234 events. 1633/2234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 10144 event pairs, 850 based on Foata normal form. 0/848 useless extension candidates. Maximal degree in co-relation 4531. Up to 1221 conditions per place. [2023-08-30 06:47:40,501 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 65 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2023-08-30 06:47:40,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 346 flow [2023-08-30 06:47:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:47:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:47:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1002 transitions. [2023-08-30 06:47:40,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42985842985842987 [2023-08-30 06:47:40,505 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1002 transitions. [2023-08-30 06:47:40,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1002 transitions. [2023-08-30 06:47:40,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:40,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1002 transitions. [2023-08-30 06:47:40,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.14285714285714) internal successors, (1002), 7 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:40,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:40,522 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:40,522 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 98 flow. Second operand 7 states and 1002 transitions. [2023-08-30 06:47:40,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 346 flow [2023-08-30 06:47:40,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:47:40,525 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 160 flow [2023-08-30 06:47:40,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 06:47:40,528 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-08-30 06:47:40,528 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 160 flow [2023-08-30 06:47:40,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:40,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:40,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:47:40,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:40,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:40,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:40,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash 648734, now seen corresponding path program 1 times [2023-08-30 06:47:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:40,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997005957] [2023-08-30 06:47:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:40,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:40,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:40,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:40,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:47:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:40,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:47:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:40,902 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:40,902 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 [2023-08-30 06:47:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:40,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:41,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997005957] [2023-08-30 06:47:41,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997005957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:41,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:41,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:47:41,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200388415] [2023-08-30 06:47:41,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:41,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:47:41,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:47:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:47:41,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 06:47:41,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:41,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:41,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 06:47:41,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:42,230 INFO L130 PetriNetUnfolder]: 1632/2231 cut-off events. [2023-08-30 06:47:42,230 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 06:47:42,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 2231 events. 1632/2231 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 10035 event pairs, 850 based on Foata normal form. 3/901 useless extension candidates. Maximal degree in co-relation 4591. Up to 1221 conditions per place. [2023-08-30 06:47:42,242 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 63 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2023-08-30 06:47:42,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 368 flow [2023-08-30 06:47:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:47:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:47:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 890 transitions. [2023-08-30 06:47:42,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44544544544544545 [2023-08-30 06:47:42,246 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 890 transitions. [2023-08-30 06:47:42,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 890 transitions. [2023-08-30 06:47:42,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:42,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 890 transitions. [2023-08-30 06:47:42,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.33333333333334) internal successors, (890), 6 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:42,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:42,253 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:42,253 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 160 flow. Second operand 6 states and 890 transitions. [2023-08-30 06:47:42,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 368 flow [2023-08-30 06:47:42,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 352 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 06:47:42,257 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 154 flow [2023-08-30 06:47:42,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-30 06:47:42,258 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-08-30 06:47:42,258 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 154 flow [2023-08-30 06:47:42,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:42,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:42,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:47:42,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:42,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:42,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:42,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash 623508582, now seen corresponding path program 1 times [2023-08-30 06:47:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506203305] [2023-08-30 06:47:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:42,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:42,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:42,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:42,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:47:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:47:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:42,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:42,658 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 06:47:42,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 06:47:42,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:47:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:43,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:43,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506203305] [2023-08-30 06:47:43,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506203305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:43,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:43,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:47:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932425055] [2023-08-30 06:47:43,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:43,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:47:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:47:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:47:43,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:47:43,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:43,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:43,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:47:43,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:44,341 INFO L130 PetriNetUnfolder]: 1576/2145 cut-off events. [2023-08-30 06:47:44,341 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 06:47:44,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4434 conditions, 2145 events. 1576/2145 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 9568 event pairs, 818 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 4419. Up to 1182 conditions per place. [2023-08-30 06:47:44,351 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 64 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 06:47:44,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 352 flow [2023-08-30 06:47:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:47:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:47:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-30 06:47:44,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43663663663663665 [2023-08-30 06:47:44,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-30 06:47:44,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-30 06:47:44,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:44,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-30 06:47:44,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:44,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:44,366 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:44,366 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 154 flow. Second operand 5 states and 727 transitions. [2023-08-30 06:47:44,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 352 flow [2023-08-30 06:47:44,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 333 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 06:47:44,371 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 137 flow [2023-08-30 06:47:44,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-30 06:47:44,373 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-08-30 06:47:44,374 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 137 flow [2023-08-30 06:47:44,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:44,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:44,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:47:44,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:44,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:44,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash 623508581, now seen corresponding path program 1 times [2023-08-30 06:47:44,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:44,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391003915] [2023-08-30 06:47:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:44,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:44,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:44,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:47:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:44,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:47:44,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:44,757 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:47:44,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 06:47:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:47:44,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:44,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:44,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391003915] [2023-08-30 06:47:44,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391003915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:44,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:44,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:44,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840303077] [2023-08-30 06:47:44,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:44,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:44,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:45,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:47:45,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:45,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:47:45,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:45,250 INFO L130 PetriNetUnfolder]: 1530/2069 cut-off events. [2023-08-30 06:47:45,251 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 06:47:45,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4276 conditions, 2069 events. 1530/2069 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9316 event pairs, 789 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 4261. Up to 2059 conditions per place. [2023-08-30 06:47:45,267 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 06:47:45,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 39 transitions, 207 flow [2023-08-30 06:47:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:47:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:47:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 06:47:45,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-08-30 06:47:45,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 06:47:45,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 06:47:45,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:45,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 06:47:45,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,272 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 137 flow. Second operand 3 states and 456 transitions. [2023-08-30 06:47:45,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 39 transitions, 207 flow [2023-08-30 06:47:45,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 39 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:47:45,274 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 130 flow [2023-08-30 06:47:45,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-30 06:47:45,275 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2023-08-30 06:47:45,275 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 130 flow [2023-08-30 06:47:45,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:45,276 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:47:45,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:45,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:45,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:45,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2146342343, now seen corresponding path program 2 times [2023-08-30 06:47:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:45,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070281527] [2023-08-30 06:47:45,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:47:45,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:45,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:45,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:45,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:47:45,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:47:45,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:45,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:47:45,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:45,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:45,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:45,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:45,640 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 06:47:45,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 06:47:45,654 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:47:45,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:47:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:47:45,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:45,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:45,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070281527] [2023-08-30 06:47:45,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070281527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:45,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:45,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:45,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674454297] [2023-08-30 06:47:45,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:45,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:45,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:45,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:45,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:45,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:47:45,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:45,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:47:45,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:46,148 INFO L130 PetriNetUnfolder]: 1530/2068 cut-off events. [2023-08-30 06:47:46,148 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 06:47:46,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4271 conditions, 2068 events. 1530/2068 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9259 event pairs, 789 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 4256. Up to 2058 conditions per place. [2023-08-30 06:47:46,154 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 06:47:46,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 38 transitions, 197 flow [2023-08-30 06:47:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:47:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:47:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-30 06:47:46,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44544544544544545 [2023-08-30 06:47:46,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-30 06:47:46,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-30 06:47:46,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:46,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-30 06:47:46,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:46,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:46,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:46,159 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 130 flow. Second operand 3 states and 445 transitions. [2023-08-30 06:47:46,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 38 transitions, 197 flow [2023-08-30 06:47:46,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 38 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:47:46,160 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 126 flow [2023-08-30 06:47:46,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-30 06:47:46,160 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2023-08-30 06:47:46,161 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 126 flow [2023-08-30 06:47:46,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:46,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:46,161 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:47:46,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:46,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:46,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2146342404, now seen corresponding path program 2 times [2023-08-30 06:47:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:46,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632067955] [2023-08-30 06:47:46,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:47:46,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:46,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:46,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:47:46,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:47:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:46,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:47:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:46,520 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:46,523 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 [2023-08-30 06:47:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:46,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:47,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:47,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632067955] [2023-08-30 06:47:47,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632067955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:47,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:47,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:47:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537282011] [2023-08-30 06:47:47,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:47,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:47:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:47:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:47:49,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:47:49,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 126 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:49,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:49,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:47:49,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:53,016 INFO L130 PetriNetUnfolder]: 6596/8886 cut-off events. [2023-08-30 06:47:53,016 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-30 06:47:53,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18375 conditions, 8886 events. 6596/8886 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 46971 event pairs, 3450 based on Foata normal form. 6/3748 useless extension candidates. Maximal degree in co-relation 18359. Up to 1134 conditions per place. [2023-08-30 06:47:53,048 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 217 selfloop transitions, 13 changer transitions 0/232 dead transitions. [2023-08-30 06:47:53,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 232 transitions, 1064 flow [2023-08-30 06:47:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:47:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:47:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1880 transitions. [2023-08-30 06:47:53,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47047047047047047 [2023-08-30 06:47:53,054 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1880 transitions. [2023-08-30 06:47:53,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1880 transitions. [2023-08-30 06:47:53,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:53,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1880 transitions. [2023-08-30 06:47:53,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:53,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:53,065 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:53,065 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 126 flow. Second operand 12 states and 1880 transitions. [2023-08-30 06:47:53,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 232 transitions, 1064 flow [2023-08-30 06:47:53,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 232 transitions, 1063 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:47:53,076 INFO L231 Difference]: Finished difference. Result has 66 places, 46 transitions, 221 flow [2023-08-30 06:47:53,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=221, PETRI_PLACES=66, PETRI_TRANSITIONS=46} [2023-08-30 06:47:53,077 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-30 06:47:53,077 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 46 transitions, 221 flow [2023-08-30 06:47:53,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:53,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:53,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:47:53,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 06:47:53,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:53,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:53,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2146075218, now seen corresponding path program 1 times [2023-08-30 06:47:53,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:53,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888327595] [2023-08-30 06:47:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:53,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:53,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:53,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:53,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:47:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:53,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:47:53,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:47:53,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:53,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:53,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888327595] [2023-08-30 06:47:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888327595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:53,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:53,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:47:53,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862937354] [2023-08-30 06:47:53,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:53,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:47:53,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:47:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:47:53,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:47:53,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 46 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:53,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:53,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:47:53,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:54,603 INFO L130 PetriNetUnfolder]: 9131/12879 cut-off events. [2023-08-30 06:47:54,604 INFO L131 PetriNetUnfolder]: For 477/477 co-relation queries the response was YES. [2023-08-30 06:47:54,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26791 conditions, 12879 events. 9131/12879 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 77220 event pairs, 2863 based on Foata normal form. 0/6121 useless extension candidates. Maximal degree in co-relation 26767. Up to 7837 conditions per place. [2023-08-30 06:47:54,658 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 61 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-08-30 06:47:54,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 414 flow [2023-08-30 06:47:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:47:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:47:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 746 transitions. [2023-08-30 06:47:54,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44804804804804804 [2023-08-30 06:47:54,661 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 746 transitions. [2023-08-30 06:47:54,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 746 transitions. [2023-08-30 06:47:54,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:54,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 746 transitions. [2023-08-30 06:47:54,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:54,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:54,665 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:54,665 INFO L175 Difference]: Start difference. First operand has 66 places, 46 transitions, 221 flow. Second operand 5 states and 746 transitions. [2023-08-30 06:47:54,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 414 flow [2023-08-30 06:47:54,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 398 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 06:47:54,672 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 229 flow [2023-08-30 06:47:54,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2023-08-30 06:47:54,673 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2023-08-30 06:47:54,673 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 229 flow [2023-08-30 06:47:54,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:54,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:54,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:47:54,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:54,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:54,883 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:54,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2146075219, now seen corresponding path program 1 times [2023-08-30 06:47:54,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:54,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917158805] [2023-08-30 06:47:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:54,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:54,886 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:54,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:47:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:47:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:55,027 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:47:55,027 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 [2023-08-30 06:47:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:47:55,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:55,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917158805] [2023-08-30 06:47:55,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917158805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:55,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:55,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:47:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678487759] [2023-08-30 06:47:55,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:55,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:47:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:47:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:47:55,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 06:47:55,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:55,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:55,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 06:47:55,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:55,896 INFO L130 PetriNetUnfolder]: 4547/6631 cut-off events. [2023-08-30 06:47:55,896 INFO L131 PetriNetUnfolder]: For 828/1132 co-relation queries the response was YES. [2023-08-30 06:47:55,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15102 conditions, 6631 events. 4547/6631 cut-off events. For 828/1132 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38934 event pairs, 2910 based on Foata normal form. 304/4487 useless extension candidates. Maximal degree in co-relation 15076. Up to 6586 conditions per place. [2023-08-30 06:47:55,924 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 37 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-08-30 06:47:55,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 45 transitions, 311 flow [2023-08-30 06:47:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:47:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:47:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-08-30 06:47:55,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219219219219219 [2023-08-30 06:47:55,927 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-08-30 06:47:55,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-08-30 06:47:55,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:55,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-08-30 06:47:55,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:55,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:55,931 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:55,931 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 229 flow. Second operand 4 states and 562 transitions. [2023-08-30 06:47:55,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 45 transitions, 311 flow [2023-08-30 06:47:55,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 45 transitions, 297 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:47:55,934 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 223 flow [2023-08-30 06:47:55,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2023-08-30 06:47:55,934 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2023-08-30 06:47:55,934 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 223 flow [2023-08-30 06:47:55,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:55,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:55,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:55,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:56,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:56,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:56,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:56,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2103661452, now seen corresponding path program 1 times [2023-08-30 06:47:56,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:56,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34312114] [2023-08-30 06:47:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:56,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:56,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:47:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:47:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:56,353 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:56,354 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 [2023-08-30 06:47:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:56,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:56,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:56,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34312114] [2023-08-30 06:47:56,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34312114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:56,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:56,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:47:56,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751796231] [2023-08-30 06:47:56,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:56,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:47:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:47:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:47:57,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:47:57,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 223 flow. Second operand has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:57,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:57,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:47:57,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:58,284 INFO L130 PetriNetUnfolder]: 4123/6015 cut-off events. [2023-08-30 06:47:58,285 INFO L131 PetriNetUnfolder]: For 764/1044 co-relation queries the response was YES. [2023-08-30 06:47:58,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13446 conditions, 6015 events. 4123/6015 cut-off events. For 764/1044 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34914 event pairs, 2654 based on Foata normal form. 280/4254 useless extension candidates. Maximal degree in co-relation 13420. Up to 5368 conditions per place. [2023-08-30 06:47:58,312 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 61 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-30 06:47:58,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 413 flow [2023-08-30 06:47:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:47:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:47:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 714 transitions. [2023-08-30 06:47:58,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42882882882882883 [2023-08-30 06:47:58,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 714 transitions. [2023-08-30 06:47:58,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 714 transitions. [2023-08-30 06:47:58,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:58,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 714 transitions. [2023-08-30 06:47:58,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:58,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:58,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:58,320 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 223 flow. Second operand 5 states and 714 transitions. [2023-08-30 06:47:58,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 413 flow [2023-08-30 06:47:58,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:47:58,323 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 218 flow [2023-08-30 06:47:58,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-30 06:47:58,324 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2023-08-30 06:47:58,324 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 218 flow [2023-08-30 06:47:58,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:58,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:58,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:58,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:58,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:58,535 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:47:58,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:58,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2103819565, now seen corresponding path program 1 times [2023-08-30 06:47:58,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:58,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787089531] [2023-08-30 06:47:58,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:58,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:58,537 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:58,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:47:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:58,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:47:58,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:58,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:58,729 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 [2023-08-30 06:47:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:47:58,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:47:59,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:59,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787089531] [2023-08-30 06:47:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787089531] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:59,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:59,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:47:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767312940] [2023-08-30 06:47:59,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:47:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:47:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:48:00,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:48:00,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:00,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:00,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:48:00,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:02,233 INFO L130 PetriNetUnfolder]: 7763/10831 cut-off events. [2023-08-30 06:48:02,233 INFO L131 PetriNetUnfolder]: For 1231/1231 co-relation queries the response was YES. [2023-08-30 06:48:02,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24664 conditions, 10831 events. 7763/10831 cut-off events. For 1231/1231 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 64121 event pairs, 846 based on Foata normal form. 296/7791 useless extension candidates. Maximal degree in co-relation 24638. Up to 3136 conditions per place. [2023-08-30 06:48:02,262 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 86 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2023-08-30 06:48:02,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 555 flow [2023-08-30 06:48:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:48:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:48:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1145 transitions. [2023-08-30 06:48:02,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298048048048048 [2023-08-30 06:48:02,267 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1145 transitions. [2023-08-30 06:48:02,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1145 transitions. [2023-08-30 06:48:02,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:02,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1145 transitions. [2023-08-30 06:48:02,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 143.125) internal successors, (1145), 8 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:02,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:02,274 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:02,274 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 218 flow. Second operand 8 states and 1145 transitions. [2023-08-30 06:48:02,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 555 flow [2023-08-30 06:48:02,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 548 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 06:48:02,280 INFO L231 Difference]: Finished difference. Result has 74 places, 48 transitions, 286 flow [2023-08-30 06:48:02,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=286, PETRI_PLACES=74, PETRI_TRANSITIONS=48} [2023-08-30 06:48:02,280 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-30 06:48:02,280 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 48 transitions, 286 flow [2023-08-30 06:48:02,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:02,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:02,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:02,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:02,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:02,491 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:48:02,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2103661454, now seen corresponding path program 1 times [2023-08-30 06:48:02,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:02,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012369973] [2023-08-30 06:48:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:48:02,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:02,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:02,493 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:02,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:48:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:48:02,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:48:02,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:02,649 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:48:02,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:48:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:48:02,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:48:02,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:02,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012369973] [2023-08-30 06:48:02,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012369973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:48:02,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:48:02,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:48:02,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687059992] [2023-08-30 06:48:02,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:48:02,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:48:02,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:02,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:48:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:48:02,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:48:02,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 48 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:02,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:02,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:48:02,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:03,426 INFO L130 PetriNetUnfolder]: 6323/8815 cut-off events. [2023-08-30 06:48:03,426 INFO L131 PetriNetUnfolder]: For 9953/10913 co-relation queries the response was YES. [2023-08-30 06:48:03,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25582 conditions, 8815 events. 6323/8815 cut-off events. For 9953/10913 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 48196 event pairs, 3880 based on Foata normal form. 960/7559 useless extension candidates. Maximal degree in co-relation 25551. Up to 8791 conditions per place. [2023-08-30 06:48:03,456 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 43 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-30 06:48:03,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 46 transitions, 370 flow [2023-08-30 06:48:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:48:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:48:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-30 06:48:03,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44044044044044045 [2023-08-30 06:48:03,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-30 06:48:03,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-30 06:48:03,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:03,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-30 06:48:03,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:03,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:03,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:03,462 INFO L175 Difference]: Start difference. First operand has 74 places, 48 transitions, 286 flow. Second operand 3 states and 440 transitions. [2023-08-30 06:48:03,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 46 transitions, 370 flow [2023-08-30 06:48:03,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 46 transitions, 353 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 06:48:03,474 INFO L231 Difference]: Finished difference. Result has 71 places, 46 transitions, 267 flow [2023-08-30 06:48:03,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=71, PETRI_TRANSITIONS=46} [2023-08-30 06:48:03,474 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2023-08-30 06:48:03,475 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 46 transitions, 267 flow [2023-08-30 06:48:03,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:03,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:03,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:03,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:03,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:03,685 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:48:03,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash -789000095, now seen corresponding path program 1 times [2023-08-30 06:48:03,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:03,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086796915] [2023-08-30 06:48:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:48:03,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:03,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:03,686 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:03,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:48:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:48:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:48:03,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:48:03,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:48:03,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:03,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086796915] [2023-08-30 06:48:03,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086796915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:48:03,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:48:03,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:48:03,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957024150] [2023-08-30 06:48:03,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:48:03,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:48:03,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:48:03,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:48:04,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:48:04,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 46 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:04,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:04,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:48:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:05,027 INFO L130 PetriNetUnfolder]: 7843/11551 cut-off events. [2023-08-30 06:48:05,027 INFO L131 PetriNetUnfolder]: For 14754/16242 co-relation queries the response was YES. [2023-08-30 06:48:05,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33274 conditions, 11551 events. 7843/11551 cut-off events. For 14754/16242 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67296 event pairs, 3920 based on Foata normal form. 1488/11351 useless extension candidates. Maximal degree in co-relation 33243. Up to 7746 conditions per place. [2023-08-30 06:48:05,079 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 59 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-08-30 06:48:05,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 68 transitions, 490 flow [2023-08-30 06:48:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:48:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:48:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2023-08-30 06:48:05,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43963963963963965 [2023-08-30 06:48:05,081 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2023-08-30 06:48:05,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2023-08-30 06:48:05,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:05,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2023-08-30 06:48:05,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:05,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:05,086 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:05,086 INFO L175 Difference]: Start difference. First operand has 71 places, 46 transitions, 267 flow. Second operand 5 states and 732 transitions. [2023-08-30 06:48:05,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 68 transitions, 490 flow [2023-08-30 06:48:05,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:48:05,102 INFO L231 Difference]: Finished difference. Result has 75 places, 47 transitions, 290 flow [2023-08-30 06:48:05,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=75, PETRI_TRANSITIONS=47} [2023-08-30 06:48:05,102 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2023-08-30 06:48:05,103 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 47 transitions, 290 flow [2023-08-30 06:48:05,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:05,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:05,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:05,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:05,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:05,312 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:48:05,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1310804027, now seen corresponding path program 1 times [2023-08-30 06:48:05,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:05,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814568588] [2023-08-30 06:48:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:48:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:05,314 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:05,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:48:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:48:05,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:48:05,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:05,477 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:05,477 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 [2023-08-30 06:48:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:48:05,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:48:05,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814568588] [2023-08-30 06:48:05,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814568588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:05,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:05,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:48:05,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960563958] [2023-08-30 06:48:05,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:05,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:48:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:48:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:48:07,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:48:07,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 47 transitions, 290 flow. Second operand has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:07,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:48:07,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:09,410 INFO L130 PetriNetUnfolder]: 12767/18155 cut-off events. [2023-08-30 06:48:09,410 INFO L131 PetriNetUnfolder]: For 26051/28283 co-relation queries the response was YES. [2023-08-30 06:48:09,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55780 conditions, 18155 events. 12767/18155 cut-off events. For 26051/28283 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 105875 event pairs, 2806 based on Foata normal form. 2792/20379 useless extension candidates. Maximal degree in co-relation 55747. Up to 5790 conditions per place. [2023-08-30 06:48:09,621 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 107 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2023-08-30 06:48:09,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 858 flow [2023-08-30 06:48:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:48:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:48:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1136 transitions. [2023-08-30 06:48:09,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264264264264264 [2023-08-30 06:48:09,625 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1136 transitions. [2023-08-30 06:48:09,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1136 transitions. [2023-08-30 06:48:09,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:09,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1136 transitions. [2023-08-30 06:48:09,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:09,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:09,630 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:09,631 INFO L175 Difference]: Start difference. First operand has 75 places, 47 transitions, 290 flow. Second operand 8 states and 1136 transitions. [2023-08-30 06:48:09,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 858 flow [2023-08-30 06:48:09,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 842 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 06:48:09,649 INFO L231 Difference]: Finished difference. Result has 84 places, 52 transitions, 349 flow [2023-08-30 06:48:09,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=349, PETRI_PLACES=84, PETRI_TRANSITIONS=52} [2023-08-30 06:48:09,650 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2023-08-30 06:48:09,650 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 52 transitions, 349 flow [2023-08-30 06:48:09,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:09,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:09,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:09,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:09,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:09,860 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:48:09,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -865475016, now seen corresponding path program 1 times [2023-08-30 06:48:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:09,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893768791] [2023-08-30 06:48:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:48:09,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:09,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:09,862 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:09,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:48:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:48:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:48:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:48:09,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:48:09,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:09,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893768791] [2023-08-30 06:48:09,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893768791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:48:09,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:48:09,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:48:09,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086297233] [2023-08-30 06:48:09,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:48:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:48:09,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:48:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:48:10,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 06:48:10,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 52 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:10,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:10,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 06:48:10,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:11,280 INFO L130 PetriNetUnfolder]: 8811/12759 cut-off events. [2023-08-30 06:48:11,281 INFO L131 PetriNetUnfolder]: For 30462/33726 co-relation queries the response was YES. [2023-08-30 06:48:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47567 conditions, 12759 events. 8811/12759 cut-off events. For 30462/33726 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 71047 event pairs, 6264 based on Foata normal form. 4160/16911 useless extension candidates. Maximal degree in co-relation 47529. Up to 12735 conditions per place. [2023-08-30 06:48:11,333 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 06:48:11,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 51 transitions, 443 flow [2023-08-30 06:48:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:48:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:48:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-30 06:48:11,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 06:48:11,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-30 06:48:11,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-30 06:48:11,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:11,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-30 06:48:11,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:11,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:11,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:11,338 INFO L175 Difference]: Start difference. First operand has 84 places, 52 transitions, 349 flow. Second operand 3 states and 444 transitions. [2023-08-30 06:48:11,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 51 transitions, 443 flow [2023-08-30 06:48:11,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 51 transitions, 424 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 06:48:11,373 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 328 flow [2023-08-30 06:48:11,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2023-08-30 06:48:11,374 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2023-08-30 06:48:11,374 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 328 flow [2023-08-30 06:48:11,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:11,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:11,374 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:11,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:11,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:11,584 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:48:11,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1571823342, now seen corresponding path program 2 times [2023-08-30 06:48:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20410159] [2023-08-30 06:48:11,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:48:11,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:11,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:11,585 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:11,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:48:11,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:48:11,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:48:11,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:11,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:11,766 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 [2023-08-30 06:48:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:11,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:12,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20410159] [2023-08-30 06:48:12,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20410159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:12,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:12,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:48:12,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740485049] [2023-08-30 06:48:12,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:48:12,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:48:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:48:21,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:48:21,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 328 flow. Second operand has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:21,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:21,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:48:21,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:28,825 INFO L130 PetriNetUnfolder]: 9731/14252 cut-off events. [2023-08-30 06:48:28,825 INFO L131 PetriNetUnfolder]: For 32629/34613 co-relation queries the response was YES. [2023-08-30 06:48:28,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50633 conditions, 14252 events. 9731/14252 cut-off events. For 32629/34613 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 83310 event pairs, 3376 based on Foata normal form. 2134/16386 useless extension candidates. Maximal degree in co-relation 50596. Up to 5621 conditions per place. [2023-08-30 06:48:28,908 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 270 selfloop transitions, 24 changer transitions 0/295 dead transitions. [2023-08-30 06:48:28,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 295 transitions, 2037 flow [2023-08-30 06:48:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:48:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:48:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2630 transitions. [2023-08-30 06:48:28,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156788367314683 [2023-08-30 06:48:28,915 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2630 transitions. [2023-08-30 06:48:28,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2630 transitions. [2023-08-30 06:48:28,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:28,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2630 transitions. [2023-08-30 06:48:28,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 138.42105263157896) internal successors, (2630), 19 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:28,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:28,928 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:28,928 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 328 flow. Second operand 19 states and 2630 transitions. [2023-08-30 06:48:28,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 295 transitions, 2037 flow [2023-08-30 06:48:28,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 295 transitions, 2036 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:48:28,988 INFO L231 Difference]: Finished difference. Result has 103 places, 66 transitions, 509 flow [2023-08-30 06:48:28,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=509, PETRI_PLACES=103, PETRI_TRANSITIONS=66} [2023-08-30 06:48:28,989 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2023-08-30 06:48:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 66 transitions, 509 flow [2023-08-30 06:48:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:28,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:28,990 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 06:48:29,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:29,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:29,199 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:48:29,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1581927217, now seen corresponding path program 3 times [2023-08-30 06:48:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185513717] [2023-08-30 06:48:29,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:48:29,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:29,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:29,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 06:48:29,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:48:29,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:48:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:29,445 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:29,445 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 [2023-08-30 06:48:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:29,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:30,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185513717] [2023-08-30 06:48:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185513717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:30,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:30,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 06:48:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667589528] [2023-08-30 06:48:30,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 06:48:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 06:48:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-30 06:48:37,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 06:48:37,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 66 transitions, 509 flow. Second operand has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:37,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:37,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 06:48:37,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:45,143 INFO L130 PetriNetUnfolder]: 8721/12939 cut-off events. [2023-08-30 06:48:45,143 INFO L131 PetriNetUnfolder]: For 38051/39907 co-relation queries the response was YES. [2023-08-30 06:48:45,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49936 conditions, 12939 events. 8721/12939 cut-off events. For 38051/39907 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 75608 event pairs, 3304 based on Foata normal form. 2006/14945 useless extension candidates. Maximal degree in co-relation 49893. Up to 6370 conditions per place. [2023-08-30 06:48:45,218 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 307 selfloop transitions, 27 changer transitions 0/335 dead transitions. [2023-08-30 06:48:45,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 335 transitions, 2417 flow [2023-08-30 06:48:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 06:48:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 06:48:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2954 transitions. [2023-08-30 06:48:45,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42242242242242245 [2023-08-30 06:48:45,224 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2954 transitions. [2023-08-30 06:48:45,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2954 transitions. [2023-08-30 06:48:45,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:45,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2954 transitions. [2023-08-30 06:48:45,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:45,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:45,235 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:45,235 INFO L175 Difference]: Start difference. First operand has 103 places, 66 transitions, 509 flow. Second operand 21 states and 2954 transitions. [2023-08-30 06:48:45,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 335 transitions, 2417 flow [2023-08-30 06:48:45,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 335 transitions, 2338 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-08-30 06:48:45,370 INFO L231 Difference]: Finished difference. Result has 124 places, 74 transitions, 616 flow [2023-08-30 06:48:45,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=616, PETRI_PLACES=124, PETRI_TRANSITIONS=74} [2023-08-30 06:48:45,371 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2023-08-30 06:48:45,371 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 74 transitions, 616 flow [2023-08-30 06:48:45,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:45,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:45,372 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:45,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-08-30 06:48:45,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:45,585 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:48:45,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash 323286753, now seen corresponding path program 2 times [2023-08-30 06:48:45,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:45,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365166285] [2023-08-30 06:48:45,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:48:45,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:45,587 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 06:48:45,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:48:45,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:45,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:48:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:45,769 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:45,769 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 [2023-08-30 06:48:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:46,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:46,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365166285] [2023-08-30 06:48:46,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365166285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:46,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:46,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:48:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329886584] [2023-08-30 06:48:46,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:46,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 06:48:46,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 06:48:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-30 06:48:54,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:48:54,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 74 transitions, 616 flow. Second operand has 17 states, 17 states have (on average 129.41176470588235) internal successors, (2200), 17 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:54,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:54,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:48:54,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:59,835 INFO L130 PetriNetUnfolder]: 9051/13735 cut-off events. [2023-08-30 06:48:59,835 INFO L131 PetriNetUnfolder]: For 52385/54745 co-relation queries the response was YES. [2023-08-30 06:48:59,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54094 conditions, 13735 events. 9051/13735 cut-off events. For 52385/54745 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 84036 event pairs, 5458 based on Foata normal form. 1626/15354 useless extension candidates. Maximal degree in co-relation 54045. Up to 9257 conditions per place. [2023-08-30 06:48:59,916 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 212 selfloop transitions, 19 changer transitions 0/236 dead transitions. [2023-08-30 06:48:59,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 236 transitions, 1910 flow [2023-08-30 06:48:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 06:48:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 06:48:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2207 transitions. [2023-08-30 06:48:59,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142267267267267 [2023-08-30 06:48:59,921 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2207 transitions. [2023-08-30 06:48:59,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2207 transitions. [2023-08-30 06:48:59,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:59,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2207 transitions. [2023-08-30 06:48:59,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 137.9375) internal successors, (2207), 16 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:59,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 333.0) internal successors, (5661), 17 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:59,930 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 333.0) internal successors, (5661), 17 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:59,930 INFO L175 Difference]: Start difference. First operand has 124 places, 74 transitions, 616 flow. Second operand 16 states and 2207 transitions. [2023-08-30 06:48:59,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 236 transitions, 1910 flow [2023-08-30 06:49:00,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 236 transitions, 1883 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-30 06:49:00,029 INFO L231 Difference]: Finished difference. Result has 138 places, 84 transitions, 720 flow [2023-08-30 06:49:00,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=720, PETRI_PLACES=138, PETRI_TRANSITIONS=84} [2023-08-30 06:49:00,030 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2023-08-30 06:49:00,030 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 84 transitions, 720 flow [2023-08-30 06:49:00,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 129.41176470588235) internal successors, (2200), 17 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:00,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:49:00,031 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:49:00,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:49:00,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:00,232 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:49:00,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:49:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash 962369212, now seen corresponding path program 3 times [2023-08-30 06:49:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:49:00,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558395677] [2023-08-30 06:49:00,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:49:00,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:00,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:49:00,233 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:49:00,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 06:49:00,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:49:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:49:00,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:49:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:49:00,505 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:49:00,505 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 [2023-08-30 06:49:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:49:00,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:49:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:49:02,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:49:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558395677] [2023-08-30 06:49:02,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558395677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:49:02,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:49:02,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:49:02,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243235367] [2023-08-30 06:49:02,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:49:02,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:49:02,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:49:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:49:02,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:49:13,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:49:13,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 84 transitions, 720 flow. Second operand has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:13,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:49:13,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:49:13,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:49:29,737 INFO L130 PetriNetUnfolder]: 21423/31609 cut-off events. [2023-08-30 06:49:29,737 INFO L131 PetriNetUnfolder]: For 152879/164288 co-relation queries the response was YES. [2023-08-30 06:49:29,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135807 conditions, 31609 events. 21423/31609 cut-off events. For 152879/164288 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 195245 event pairs, 15980 based on Foata normal form. 7942/39543 useless extension candidates. Maximal degree in co-relation 135752. Up to 5423 conditions per place. [2023-08-30 06:49:29,917 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 625 selfloop transitions, 25 changer transitions 0/658 dead transitions. [2023-08-30 06:49:29,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 658 transitions, 5511 flow [2023-08-30 06:49:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:49:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:49:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3723 transitions. [2023-08-30 06:49:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658408408408408 [2023-08-30 06:49:29,922 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3723 transitions. [2023-08-30 06:49:29,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3723 transitions. [2023-08-30 06:49:29,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:49:29,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3723 transitions. [2023-08-30 06:49:29,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 155.125) internal successors, (3723), 24 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:29,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:29,932 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:29,932 INFO L175 Difference]: Start difference. First operand has 138 places, 84 transitions, 720 flow. Second operand 24 states and 3723 transitions. [2023-08-30 06:49:29,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 658 transitions, 5511 flow [2023-08-30 06:49:30,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 658 transitions, 5495 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 06:49:30,555 INFO L231 Difference]: Finished difference. Result has 170 places, 98 transitions, 912 flow [2023-08-30 06:49:30,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=912, PETRI_PLACES=170, PETRI_TRANSITIONS=98} [2023-08-30 06:49:30,556 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2023-08-30 06:49:30,556 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 98 transitions, 912 flow [2023-08-30 06:49:30,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:30,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:49:30,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-30 06:49:30,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:49:30,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:30,760 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:49:30,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:49:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1728324944, now seen corresponding path program 4 times [2023-08-30 06:49:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:49:30,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128594613] [2023-08-30 06:49:30,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:49:30,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:30,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:49:30,762 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:49:30,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 06:49:30,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:49:30,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:49:30,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:49:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:49:30,949 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:49:30,949 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 [2023-08-30 06:49:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:49:31,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:49:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:49:31,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:49:31,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128594613] [2023-08-30 06:49:31,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128594613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:49:31,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:49:31,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 06:49:31,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222273269] [2023-08-30 06:49:31,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:49:31,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:49:31,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:49:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:49:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:49:37,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:49:37,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 98 transitions, 912 flow. Second operand has 16 states, 16 states have (on average 133.25) internal successors, (2132), 16 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:37,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:49:37,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:49:37,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:49:54,814 INFO L130 PetriNetUnfolder]: 52307/78755 cut-off events. [2023-08-30 06:49:54,814 INFO L131 PetriNetUnfolder]: For 298821/312896 co-relation queries the response was YES. [2023-08-30 06:49:55,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323753 conditions, 78755 events. 52307/78755 cut-off events. For 298821/312896 co-relation queries the response was YES. Maximal size of possible extension queue 1588. Compared 572268 event pairs, 3822 based on Foata normal form. 16211/94940 useless extension candidates. Maximal degree in co-relation 323684. Up to 14449 conditions per place. [2023-08-30 06:49:55,692 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 294 selfloop transitions, 38 changer transitions 0/335 dead transitions. [2023-08-30 06:49:55,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 335 transitions, 2883 flow [2023-08-30 06:49:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:49:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:49:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2035 transitions. [2023-08-30 06:49:55,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-08-30 06:49:55,695 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2035 transitions. [2023-08-30 06:49:55,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2035 transitions. [2023-08-30 06:49:55,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:49:55,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2035 transitions. [2023-08-30 06:49:55,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.35714285714286) internal successors, (2035), 14 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:55,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:55,700 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:55,700 INFO L175 Difference]: Start difference. First operand has 170 places, 98 transitions, 912 flow. Second operand 14 states and 2035 transitions. [2023-08-30 06:49:55,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 335 transitions, 2883 flow [2023-08-30 06:49:57,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 335 transitions, 2847 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-08-30 06:49:57,444 INFO L231 Difference]: Finished difference. Result has 179 places, 104 transitions, 1053 flow [2023-08-30 06:49:57,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1053, PETRI_PLACES=179, PETRI_TRANSITIONS=104} [2023-08-30 06:49:57,445 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2023-08-30 06:49:57,445 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 104 transitions, 1053 flow [2023-08-30 06:49:57,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 133.25) internal successors, (2132), 16 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:57,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:49:57,446 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:49:57,453 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 (25)] Ended with exit code 0 [2023-08-30 06:49:57,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:57,646 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:49:57,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:49:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1212775463, now seen corresponding path program 3 times [2023-08-30 06:49:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:49:57,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112620754] [2023-08-30 06:49:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:49:57,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:49:57,648 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:49:57,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 06:49:57,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:49:57,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:49:57,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:49:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:49:57,930 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:49:57,930 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 [2023-08-30 06:49:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:49:58,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:49:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:49:58,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:49:58,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112620754] [2023-08-30 06:49:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112620754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:49:58,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:49:58,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 06:49:58,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554521109] [2023-08-30 06:49:58,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:49:58,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:49:58,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:49:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:49:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:50:01,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 333 [2023-08-30 06:50:01,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 104 transitions, 1053 flow. Second operand has 16 states, 16 states have (on average 130.5) internal successors, (2088), 16 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:01,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:50:01,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 333 [2023-08-30 06:50:01,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:50:16,171 INFO L130 PetriNetUnfolder]: 54941/82855 cut-off events. [2023-08-30 06:50:16,172 INFO L131 PetriNetUnfolder]: For 330539/338994 co-relation queries the response was YES. [2023-08-30 06:50:16,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367301 conditions, 82855 events. 54941/82855 cut-off events. For 330539/338994 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 591623 event pairs, 44618 based on Foata normal form. 4767/87603 useless extension candidates. Maximal degree in co-relation 367225. Up to 81924 conditions per place. [2023-08-30 06:50:17,462 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 169 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2023-08-30 06:50:17,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 187 transitions, 1745 flow [2023-08-30 06:50:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:50:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:50:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1789 transitions. [2023-08-30 06:50:17,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41325941325941323 [2023-08-30 06:50:17,466 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1789 transitions. [2023-08-30 06:50:17,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1789 transitions. [2023-08-30 06:50:17,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:50:17,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1789 transitions. [2023-08-30 06:50:17,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 137.6153846153846) internal successors, (1789), 13 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:17,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 333.0) internal successors, (4662), 14 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:17,471 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 333.0) internal successors, (4662), 14 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:17,471 INFO L175 Difference]: Start difference. First operand has 179 places, 104 transitions, 1053 flow. Second operand 13 states and 1789 transitions. [2023-08-30 06:50:17,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 187 transitions, 1745 flow [2023-08-30 06:50:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 187 transitions, 1645 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-30 06:50:20,858 INFO L231 Difference]: Finished difference. Result has 189 places, 107 transitions, 1035 flow [2023-08-30 06:50:20,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1035, PETRI_PLACES=189, PETRI_TRANSITIONS=107} [2023-08-30 06:50:20,858 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 133 predicate places. [2023-08-30 06:50:20,858 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 107 transitions, 1035 flow [2023-08-30 06:50:20,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 130.5) internal successors, (2088), 16 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:20,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:50:20,859 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:50:20,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 06:50:21,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:50:21,060 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:50:21,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:50:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1595132549, now seen corresponding path program 4 times [2023-08-30 06:50:21,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:50:21,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988872211] [2023-08-30 06:50:21,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:50:21,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:50:21,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:50:21,062 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:50:21,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 06:50:21,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:50:21,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:50:21,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:50:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:50:21,265 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:50:21,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:50:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:50:21,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:50:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:50:22,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:50:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988872211] [2023-08-30 06:50:22,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988872211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:50:22,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:50:22,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-08-30 06:50:22,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618248777] [2023-08-30 06:50:22,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:50:22,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 06:50:22,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:50:22,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 06:50:22,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-08-30 06:50:38,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:50:38,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 107 transitions, 1035 flow. Second operand has 22 states, 22 states have (on average 128.36363636363637) internal successors, (2824), 22 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:38,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:50:38,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:50:38,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:50:53,896 INFO L130 PetriNetUnfolder]: 54393/82005 cut-off events. [2023-08-30 06:50:53,897 INFO L131 PetriNetUnfolder]: For 329414/337839 co-relation queries the response was YES. [2023-08-30 06:50:54,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337814 conditions, 82005 events. 54393/82005 cut-off events. For 329414/337839 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 583510 event pairs, 43066 based on Foata normal form. 4769/86755 useless extension candidates. Maximal degree in co-relation 337734. Up to 79179 conditions per place. [2023-08-30 06:50:55,283 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 263 selfloop transitions, 28 changer transitions 0/296 dead transitions. [2023-08-30 06:50:55,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 296 transitions, 2470 flow [2023-08-30 06:50:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 06:50:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 06:50:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2996 transitions. [2023-08-30 06:50:55,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40895440895440893 [2023-08-30 06:50:55,287 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2996 transitions. [2023-08-30 06:50:55,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2996 transitions. [2023-08-30 06:50:55,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:50:55,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2996 transitions. [2023-08-30 06:50:55,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 136.1818181818182) internal successors, (2996), 22 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:55,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 333.0) internal successors, (7659), 23 states have internal predecessors, (7659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:55,295 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 333.0) internal successors, (7659), 23 states have internal predecessors, (7659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:55,295 INFO L175 Difference]: Start difference. First operand has 189 places, 107 transitions, 1035 flow. Second operand 22 states and 2996 transitions. [2023-08-30 06:50:55,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 296 transitions, 2470 flow [2023-08-30 06:50:58,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 2450 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 06:50:58,820 INFO L231 Difference]: Finished difference. Result has 204 places, 113 transitions, 1170 flow [2023-08-30 06:50:58,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1170, PETRI_PLACES=204, PETRI_TRANSITIONS=113} [2023-08-30 06:50:58,821 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 148 predicate places. [2023-08-30 06:50:58,821 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 113 transitions, 1170 flow [2023-08-30 06:50:58,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 128.36363636363637) internal successors, (2824), 22 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:58,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:50:58,821 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:50:58,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 06:50:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:50:59,025 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:50:59,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:50:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash 397470915, now seen corresponding path program 5 times [2023-08-30 06:50:59,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:50:59,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484542654] [2023-08-30 06:50:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:50:59,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:50:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:50:59,027 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:50:59,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 06:50:59,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 06:50:59,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:50:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:50:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:50:59,261 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:50:59,261 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 [2023-08-30 06:50:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:50:59,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:51:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:51:01,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:51:01,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484542654] [2023-08-30 06:51:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484542654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:51:01,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:51:01,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:51:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325656616] [2023-08-30 06:51:01,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:51:01,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:51:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:51:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:51:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:51:14,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:51:14,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 113 transitions, 1170 flow. Second operand has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:14,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:51:14,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:51:14,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:51:51,263 INFO L130 PetriNetUnfolder]: 93087/136671 cut-off events. [2023-08-30 06:51:51,263 INFO L131 PetriNetUnfolder]: For 567916/581885 co-relation queries the response was YES. [2023-08-30 06:51:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536463 conditions, 136671 events. 93087/136671 cut-off events. For 567916/581885 co-relation queries the response was YES. Maximal size of possible extension queue 2386. Compared 1008071 event pairs, 7992 based on Foata normal form. 31717/168369 useless extension candidates. Maximal degree in co-relation 536382. Up to 30054 conditions per place. [2023-08-30 06:51:53,012 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 587 selfloop transitions, 49 changer transitions 0/641 dead transitions. [2023-08-30 06:51:53,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 641 transitions, 6114 flow [2023-08-30 06:51:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 06:51:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 06:51:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5087 transitions. [2023-08-30 06:51:53,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128723317912507 [2023-08-30 06:51:53,020 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5087 transitions. [2023-08-30 06:51:53,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5087 transitions. [2023-08-30 06:51:53,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:51:53,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5087 transitions. [2023-08-30 06:51:53,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 137.48648648648648) internal successors, (5087), 37 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:53,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:53,035 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:53,035 INFO L175 Difference]: Start difference. First operand has 204 places, 113 transitions, 1170 flow. Second operand 37 states and 5087 transitions. [2023-08-30 06:51:53,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 641 transitions, 6114 flow [2023-08-30 06:52:00,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 641 transitions, 6047 flow, removed 5 selfloop flow, removed 19 redundant places. [2023-08-30 06:52:00,936 INFO L231 Difference]: Finished difference. Result has 221 places, 129 transitions, 1311 flow [2023-08-30 06:52:00,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1311, PETRI_PLACES=221, PETRI_TRANSITIONS=129} [2023-08-30 06:52:00,937 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 165 predicate places. [2023-08-30 06:52:00,937 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 129 transitions, 1311 flow [2023-08-30 06:52:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:00,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:52:00,937 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 1, 1, 1, 1, 1] [2023-08-30 06:52:00,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 06:52:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:01,141 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:52:01,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:52:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2029101746, now seen corresponding path program 5 times [2023-08-30 06:52:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:52:01,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870974762] [2023-08-30 06:52:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:52:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:52:01,142 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:52:01,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 06:52:01,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 06:52:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:52:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 06:52:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:52:01,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:52:01,451 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 [2023-08-30 06:52:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:52:01,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:52:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:52:04,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:52:04,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870974762] [2023-08-30 06:52:04,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870974762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:52:04,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:52:04,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 34 [2023-08-30 06:52:04,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504762252] [2023-08-30 06:52:04,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:52:04,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 06:52:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:52:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 06:52:04,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 06:52:32,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:52:32,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 129 transitions, 1311 flow. Second operand has 35 states, 35 states have (on average 128.11428571428573) internal successors, (4484), 35 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:32,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:32,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:52:32,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:18,582 INFO L130 PetriNetUnfolder]: 90705/132996 cut-off events. [2023-08-30 06:53:18,582 INFO L131 PetriNetUnfolder]: For 537622/548449 co-relation queries the response was YES. [2023-08-30 06:53:19,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575250 conditions, 132996 events. 90705/132996 cut-off events. For 537622/548449 co-relation queries the response was YES. Maximal size of possible extension queue 2329. Compared 954001 event pairs, 57170 based on Foata normal form. 8373/141361 useless extension candidates. Maximal degree in co-relation 575173. Up to 103551 conditions per place. [2023-08-30 06:53:20,619 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 1071 selfloop transitions, 90 changer transitions 0/1165 dead transitions. [2023-08-30 06:53:20,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1165 transitions, 10165 flow [2023-08-30 06:53:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 06:53:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 06:53:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 7367 transitions. [2023-08-30 06:53:20,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174174174174174 [2023-08-30 06:53:20,631 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 7367 transitions. [2023-08-30 06:53:20,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 7367 transitions. [2023-08-30 06:53:20,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:20,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 7367 transitions. [2023-08-30 06:53:20,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 139.0) internal successors, (7367), 53 states have internal predecessors, (7367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:20,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 333.0) internal successors, (17982), 54 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:20,652 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 333.0) internal successors, (17982), 54 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:20,652 INFO L175 Difference]: Start difference. First operand has 221 places, 129 transitions, 1311 flow. Second operand 53 states and 7367 transitions. [2023-08-30 06:53:20,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1165 transitions, 10165 flow [2023-08-30 06:53:24,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1165 transitions, 7325 flow, removed 858 selfloop flow, removed 28 redundant places. [2023-08-30 06:53:24,941 INFO L231 Difference]: Finished difference. Result has 257 places, 183 transitions, 1773 flow [2023-08-30 06:53:24,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=1773, PETRI_PLACES=257, PETRI_TRANSITIONS=183} [2023-08-30 06:53:24,942 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 201 predicate places. [2023-08-30 06:53:24,942 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 183 transitions, 1773 flow [2023-08-30 06:53:24,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 128.11428571428573) internal successors, (4484), 35 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:24,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:24,943 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:24,953 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:25,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:25,148 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:53:25,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 557456643, now seen corresponding path program 6 times [2023-08-30 06:53:25,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:25,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913318373] [2023-08-30 06:53:25,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:53:25,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:25,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:25,152 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:25,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 06:53:25,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 06:53:25,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:53:25,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 06:53:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:25,672 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:53:25,672 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 [2023-08-30 06:53:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:26,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:28,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:28,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913318373] [2023-08-30 06:53:28,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913318373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:28,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:28,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2023-08-30 06:53:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810757402] [2023-08-30 06:53:28,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:28,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 06:53:28,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 06:53:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 06:53:47,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 06:53:47,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 183 transitions, 1773 flow. Second operand has 34 states, 34 states have (on average 131.2058823529412) internal successors, (4461), 34 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:47,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:47,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 06:53:47,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:31,248 INFO L130 PetriNetUnfolder]: 89523/135113 cut-off events. [2023-08-30 06:54:31,249 INFO L131 PetriNetUnfolder]: For 553520/568054 co-relation queries the response was YES. [2023-08-30 06:54:32,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522049 conditions, 135113 events. 89523/135113 cut-off events. For 553520/568054 co-relation queries the response was YES. Maximal size of possible extension queue 2593. Compared 1029381 event pairs, 46330 based on Foata normal form. 8309/143413 useless extension candidates. Maximal degree in co-relation 521970. Up to 84475 conditions per place. [2023-08-30 06:54:33,302 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 819 selfloop transitions, 68 changer transitions 0/894 dead transitions. [2023-08-30 06:54:33,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 894 transitions, 9534 flow [2023-08-30 06:54:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 06:54:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 06:54:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5861 transitions. [2023-08-30 06:54:33,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190619190619191 [2023-08-30 06:54:33,308 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5861 transitions. [2023-08-30 06:54:33,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5861 transitions. [2023-08-30 06:54:33,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:33,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5861 transitions. [2023-08-30 06:54:33,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 139.54761904761904) internal successors, (5861), 42 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:33,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:33,326 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:33,326 INFO L175 Difference]: Start difference. First operand has 257 places, 183 transitions, 1773 flow. Second operand 42 states and 5861 transitions. [2023-08-30 06:54:33,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 894 transitions, 9534 flow [2023-08-30 06:54:36,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 894 transitions, 8260 flow, removed 430 selfloop flow, removed 35 redundant places. [2023-08-30 06:54:36,867 INFO L231 Difference]: Finished difference. Result has 270 places, 189 transitions, 1683 flow [2023-08-30 06:54:36,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1683, PETRI_PLACES=270, PETRI_TRANSITIONS=189} [2023-08-30 06:54:36,868 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 214 predicate places. [2023-08-30 06:54:36,868 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 189 transitions, 1683 flow [2023-08-30 06:54:36,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 131.2058823529412) internal successors, (4461), 34 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:36,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:36,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:54:36,879 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 (30)] Forceful destruction successful, exit code 0 [2023-08-30 06:54:37,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:37,070 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:54:37,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:37,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1794722650, now seen corresponding path program 1 times [2023-08-30 06:54:37,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:37,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189543795] [2023-08-30 06:54:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:54:37,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:37,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:37,072 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:54:37,073 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 (31)] Waiting until timeout for monitored process [2023-08-30 06:54:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:54:37,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 06:54:37,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:37,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:54:37,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2023-08-30 06:54:37,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:54:37,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 55 [2023-08-30 06:54:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:54:37,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:54:39,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:54:39,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 40 [2023-08-30 06:54:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:54:41,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:41,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189543795] [2023-08-30 06:54:41,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189543795] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 06:54:41,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 06:54:41,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-30 06:54:41,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104756184] [2023-08-30 06:54:41,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:54:41,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:54:41,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:54:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2023-08-30 06:54:41,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 333 [2023-08-30 06:54:41,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 189 transitions, 1683 flow. Second operand has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:41,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:41,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 333 [2023-08-30 06:54:41,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:55:02,262 INFO L130 PetriNetUnfolder]: 84291/126624 cut-off events. [2023-08-30 06:55:02,263 INFO L131 PetriNetUnfolder]: For 535210/558614 co-relation queries the response was YES. [2023-08-30 06:55:03,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496450 conditions, 126624 events. 84291/126624 cut-off events. For 535210/558614 co-relation queries the response was YES. Maximal size of possible extension queue 2555. Compared 992487 event pairs, 37421 based on Foata normal form. 14304/140830 useless extension candidates. Maximal degree in co-relation 496377. Up to 72380 conditions per place. [2023-08-30 06:55:03,781 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 152 selfloop transitions, 2 changer transitions 161/319 dead transitions. [2023-08-30 06:55:03,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 319 transitions, 3386 flow [2023-08-30 06:55:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:55:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:55:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 602 transitions. [2023-08-30 06:55:03,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519519519519519 [2023-08-30 06:55:03,784 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 602 transitions. [2023-08-30 06:55:03,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 602 transitions. [2023-08-30 06:55:03,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:55:03,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 602 transitions. [2023-08-30 06:55:03,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:03,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:03,786 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:03,786 INFO L175 Difference]: Start difference. First operand has 270 places, 189 transitions, 1683 flow. Second operand 4 states and 602 transitions. [2023-08-30 06:55:03,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 319 transitions, 3386 flow [2023-08-30 06:55:06,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 319 transitions, 3231 flow, removed 28 selfloop flow, removed 23 redundant places. [2023-08-30 06:55:06,856 INFO L231 Difference]: Finished difference. Result has 249 places, 100 transitions, 862 flow [2023-08-30 06:55:06,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=862, PETRI_PLACES=249, PETRI_TRANSITIONS=100} [2023-08-30 06:55:06,856 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 193 predicate places. [2023-08-30 06:55:06,856 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 100 transitions, 862 flow [2023-08-30 06:55:06,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:06,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:55:06,857 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 6, 1, 1, 1, 1, 1] [2023-08-30 06:55:06,864 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 06:55:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:55:07,058 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:55:07,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:55:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash 141355857, now seen corresponding path program 6 times [2023-08-30 06:55:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:55:07,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760533449] [2023-08-30 06:55:07,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:55:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:55:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:55:07,061 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:55:07,062 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 (32)] Waiting until timeout for monitored process [2023-08-30 06:55:07,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 06:55:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:55:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 06:55:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:55:07,436 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:55:07,436 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 [2023-08-30 06:55:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:08,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:55:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:12,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:55:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760533449] [2023-08-30 06:55:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760533449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:55:12,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:55:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2023-08-30 06:55:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768525132] [2023-08-30 06:55:12,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:55:12,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 06:55:12,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:55:12,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 06:55:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 06:55:50,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:55:50,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 100 transitions, 862 flow. Second operand has 41 states, 41 states have (on average 128.0731707317073) internal successors, (5251), 41 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:50,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:55:50,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:55:50,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:28,459 INFO L130 PetriNetUnfolder]: 76690/112391 cut-off events. [2023-08-30 06:56:28,459 INFO L131 PetriNetUnfolder]: For 459289/469616 co-relation queries the response was YES. [2023-08-30 06:56:29,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460205 conditions, 112391 events. 76690/112391 cut-off events. For 459289/469616 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 805615 event pairs, 42198 based on Foata normal form. 6993/119383 useless extension candidates. Maximal degree in co-relation 460146. Up to 75356 conditions per place. [2023-08-30 06:56:29,799 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 565 selfloop transitions, 44 changer transitions 214/825 dead transitions. [2023-08-30 06:56:29,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 825 transitions, 7060 flow [2023-08-30 06:56:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 06:56:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 06:56:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4886 transitions. [2023-08-30 06:56:29,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075742409075742 [2023-08-30 06:56:29,807 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4886 transitions. [2023-08-30 06:56:29,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4886 transitions. [2023-08-30 06:56:29,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:29,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4886 transitions. [2023-08-30 06:56:29,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 135.72222222222223) internal successors, (4886), 36 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:29,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:29,821 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:29,821 INFO L175 Difference]: Start difference. First operand has 249 places, 100 transitions, 862 flow. Second operand 36 states and 4886 transitions. [2023-08-30 06:56:29,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 825 transitions, 7060 flow [2023-08-30 06:56:35,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 825 transitions, 6066 flow, removed 484 selfloop flow, removed 7 redundant places. [2023-08-30 06:56:35,690 INFO L231 Difference]: Finished difference. Result has 211 places, 115 transitions, 1160 flow [2023-08-30 06:56:35,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1160, PETRI_PLACES=211, PETRI_TRANSITIONS=115} [2023-08-30 06:56:35,691 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 155 predicate places. [2023-08-30 06:56:35,691 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 115 transitions, 1160 flow [2023-08-30 06:56:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 128.0731707317073) internal successors, (5251), 41 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:35,692 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2023-08-30 06:56:35,704 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 (32)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:35,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:56:35,893 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:56:35,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1394561328, now seen corresponding path program 7 times [2023-08-30 06:56:35,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:56:35,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087596650] [2023-08-30 06:56:35,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:56:35,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:56:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:56:35,896 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:56:35,898 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 (33)] Waiting until timeout for monitored process [2023-08-30 06:56:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 06:56:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:36,266 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:56:36,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:56:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:37,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:43,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:56:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087596650] [2023-08-30 06:56:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087596650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:43,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:56:43,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2023-08-30 06:56:43,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243421515] [2023-08-30 06:56:43,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 06:56:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:56:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 06:56:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 06:57:23,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:57:23,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 115 transitions, 1160 flow. Second operand has 43 states, 43 states have (on average 128.06976744186048) internal successors, (5507), 43 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:23,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:23,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:57:23,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:06,769 INFO L130 PetriNetUnfolder]: 75543/110698 cut-off events. [2023-08-30 06:58:06,770 INFO L131 PetriNetUnfolder]: For 374569/384795 co-relation queries the response was YES. [2023-08-30 06:58:07,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431536 conditions, 110698 events. 75543/110698 cut-off events. For 374569/384795 co-relation queries the response was YES. Maximal size of possible extension queue 2251. Compared 793919 event pairs, 49008 based on Foata normal form. 6816/117489 useless extension candidates. Maximal degree in co-relation 431467. Up to 87947 conditions per place. [2023-08-30 06:58:08,235 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 333 selfloop transitions, 25 changer transitions 561/921 dead transitions. [2023-08-30 06:58:08,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 921 transitions, 7648 flow [2023-08-30 06:58:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 06:58:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 06:58:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 6264 transitions. [2023-08-30 06:58:08,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408930669800235 [2023-08-30 06:58:08,245 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 6264 transitions. [2023-08-30 06:58:08,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 6264 transitions. [2023-08-30 06:58:08,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:08,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 6264 transitions. [2023-08-30 06:58:08,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 136.17391304347825) internal successors, (6264), 46 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:08,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 333.0) internal successors, (15651), 47 states have internal predecessors, (15651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:08,261 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 333.0) internal successors, (15651), 47 states have internal predecessors, (15651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:08,261 INFO L175 Difference]: Start difference. First operand has 211 places, 115 transitions, 1160 flow. Second operand 46 states and 6264 transitions. [2023-08-30 06:58:08,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 921 transitions, 7648 flow [2023-08-30 06:58:35,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 921 transitions, 6882 flow, removed 350 selfloop flow, removed 16 redundant places. [2023-08-30 06:58:35,839 INFO L231 Difference]: Finished difference. Result has 253 places, 113 transitions, 1152 flow [2023-08-30 06:58:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1152, PETRI_PLACES=253, PETRI_TRANSITIONS=113} [2023-08-30 06:58:35,840 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 197 predicate places. [2023-08-30 06:58:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 113 transitions, 1152 flow [2023-08-30 06:58:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 128.06976744186048) internal successors, (5507), 43 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:35,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:58:35,841 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 06:58:35,851 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 (33)] Forceful destruction successful, exit code 0 [2023-08-30 06:58:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:36,042 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 06:58:36,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1433485372, now seen corresponding path program 4 times [2023-08-30 06:58:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:36,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235958736] [2023-08-30 06:58:36,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:58:36,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:36,044 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:36,044 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 (34)] Waiting until timeout for monitored process [2023-08-30 06:58:36,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:58:36,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:58:36,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 06:58:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:36,304 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:58:36,305 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 [2023-08-30 06:58:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:37,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:58:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:44,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235958736] [2023-08-30 06:58:44,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235958736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:58:44,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:58:44,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 06:58:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651428555] [2023-08-30 06:58:44,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:58:44,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 06:58:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 06:58:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 06:59:42,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:59:42,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 113 transitions, 1152 flow. Second operand has 48 states, 48 states have (on average 138.0) internal successors, (6624), 48 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:42,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:42,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:59:42,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:59:59,612 WARN L222 SmtUtils]: Spent 12.70s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:00:14,574 WARN L222 SmtUtils]: Spent 13.63s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15