./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:16:39,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:16:39,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:16:39,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:16:39,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:16:39,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:16:39,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:16:39,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:16:39,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:16:39,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:16:39,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:16:39,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:16:39,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:16:39,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:16:39,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:16:39,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:16:39,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:16:39,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:16:39,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:16:39,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:16:39,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:16:39,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:16:39,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:16:39,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:16:39,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:16:39,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:16:39,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:16:39,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:16:39,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:16:39,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:16:39,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:16:39,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:16:39,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:16:39,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:16:39,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:16:39,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:16:39,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:16:39,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:16:39,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:16:39,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:16:39,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:16:39,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:16:39,562 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:16:39,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:16:39,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:16:39,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:16:39,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:16:39,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:16:39,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:16:39,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:16:39,565 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:16:39,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:16:39,565 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:16:39,565 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:16:39,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:16:39,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:16:39,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:16:39,566 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:16:39,566 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:16:39,566 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:16:39,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:16:39,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:16:39,567 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:16:39,567 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:16:39,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:16:39,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:16:39,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:16:39,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:16:39,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:16:39,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:16:39,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:16:39,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:16:39,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:16:39,569 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:16:39,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:16:39,569 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:16:39,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:16:39,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:16:39,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:16:39,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:16:39,807 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:16:39,807 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:16:39,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 00:16:40,745 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:16:40,883 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:16:40,883 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 00:16:40,890 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e149dd85/fafb1ca5c5d04bfd99da8c164938a44f/FLAG826b9c684 [2023-08-30 00:16:40,898 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e149dd85/fafb1ca5c5d04bfd99da8c164938a44f [2023-08-30 00:16:40,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:16:40,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:16:40,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:16:40,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:16:40,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:16:40,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:16:40" (1/1) ... [2023-08-30 00:16:40,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a6e4083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:40, skipping insertion in model container [2023-08-30 00:16:40,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:16:40" (1/1) ... [2023-08-30 00:16:40,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:16:40,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:16:41,055 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-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 00:16:41,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:16:41,079 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:16:41,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78334a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:41, skipping insertion in model container [2023-08-30 00:16:41,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:16:41,081 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:16:41,083 INFO L158 Benchmark]: Toolchain (without parser) took 180.29ms. Allocated memory is still 73.4MB. Free memory was 44.9MB in the beginning and 52.9MB in the end (delta: -7.9MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2023-08-30 00:16:41,083 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:16:41,084 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.58ms. Allocated memory is still 73.4MB. Free memory was 44.7MB in the beginning and 52.9MB in the end (delta: -8.2MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2023-08-30 00:16:41,085 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.58ms. Allocated memory is still 73.4MB. Free memory was 44.7MB in the beginning and 52.9MB in the end (delta: -8.2MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: 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-array-sum-alt2.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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:16:42,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:16:42,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:16:42,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:16:42,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:16:42,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:16:42,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:16:42,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:16:42,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:16:42,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:16:42,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:16:42,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:16:42,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:16:42,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:16:42,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:16:42,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:16:42,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:16:42,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:16:42,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:16:42,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:16:42,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:16:42,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:16:42,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:16:42,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:16:42,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:16:42,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:16:42,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:16:42,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:16:42,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:16:42,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:16:42,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:16:42,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:16:42,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:16:42,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:16:42,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:16:42,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:16:42,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:16:42,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:16:42,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:16:42,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:16:42,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:16:42,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:16:42,536 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:16:42,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:16:42,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:16:42,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:16:42,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:16:42,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:16:42,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:16:42,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:16:42,539 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:16:42,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:16:42,540 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:16:42,540 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:16:42,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:16:42,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:16:42,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:16:42,540 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:16:42,541 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:16:42,541 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:16:42,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:16:42,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:16:42,541 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:16:42,541 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:16:42,541 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:16:42,542 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:16:42,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:16:42,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:16:42,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:16:42,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:16:42,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:16:42,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:16:42,543 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:16:42,543 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:16:42,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:16:42,543 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:16:42,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:16:42,543 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:16:42,544 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:16:42,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:16:42,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:16:42,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:16:42,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:16:42,805 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:16:42,805 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:16:42,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 00:16:43,772 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:16:43,928 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:16:43,928 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 00:16:43,933 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/494eaa347/012adfe5e0074b20bf046666b03a0d83/FLAGc5d2cb8cc [2023-08-30 00:16:43,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/494eaa347/012adfe5e0074b20bf046666b03a0d83 [2023-08-30 00:16:43,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:16:43,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:16:43,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:16:43,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:16:43,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:16:43,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:16:43" (1/1) ... [2023-08-30 00:16:43,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71aa8c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:43, skipping insertion in model container [2023-08-30 00:16:43,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:16:43" (1/1) ... [2023-08-30 00:16:43,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:16:43,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:16:44,117 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-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 00:16:44,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:16:44,143 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:16:44,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:16:44,168 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-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 00:16:44,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:16:44,182 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:16:44,205 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-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 00:16:44,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:16:44,221 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:16:44,222 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:16:44,226 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:16:44,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44 WrapperNode [2023-08-30 00:16:44,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:16:44,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:16:44,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:16:44,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:16:44,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,255 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 188 [2023-08-30 00:16:44,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:16:44,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:16:44,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:16:44,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:16:44,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,319 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:16:44,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:16:44,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:16:44,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:16:44,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (1/1) ... [2023-08-30 00:16:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:16:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:16:44,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:16:44,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:16:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:16:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:16:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:16:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:16:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:16:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:16:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:16:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:16:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:16:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:16:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:16:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:16:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:16:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:16:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:16:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:16:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:16:44,393 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:16:44,500 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:16:44,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:16:44,831 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:16:44,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:16:44,934 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:16:44,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:16:44 BoogieIcfgContainer [2023-08-30 00:16:44,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:16:44,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:16:44,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:16:44,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:16:44,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:16:43" (1/3) ... [2023-08-30 00:16:44,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6946f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:16:44, skipping insertion in model container [2023-08-30 00:16:44,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:16:44" (2/3) ... [2023-08-30 00:16:44,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6946f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:16:44, skipping insertion in model container [2023-08-30 00:16:44,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:16:44" (3/3) ... [2023-08-30 00:16:44,940 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-08-30 00:16:44,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:16:44,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-30 00:16:44,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:16:45,011 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:16:45,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 165 transitions, 354 flow [2023-08-30 00:16:45,113 INFO L130 PetriNetUnfolder]: 12/162 cut-off events. [2023-08-30 00:16:45,113 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:16:45,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 162 events. 12/162 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. 0/128 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-30 00:16:45,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 165 transitions, 354 flow [2023-08-30 00:16:45,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 158 transitions, 334 flow [2023-08-30 00:16:45,127 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:16:45,132 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 158 transitions, 334 flow [2023-08-30 00:16:45,134 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 158 transitions, 334 flow [2023-08-30 00:16:45,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 158 transitions, 334 flow [2023-08-30 00:16:45,157 INFO L130 PetriNetUnfolder]: 12/158 cut-off events. [2023-08-30 00:16:45,157 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:16:45,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 158 events. 12/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-30 00:16:45,159 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-08-30 00:17:01,782 INFO L134 LiptonReduction]: Checked pairs total: 2843 [2023-08-30 00:17:01,783 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 00:17:01,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:17:01,804 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;@353eda00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:17:01,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-30 00:17:01,807 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:17:01,808 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:17:01,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:01,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:17:01,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:01,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash 24637, now seen corresponding path program 1 times [2023-08-30 00:17:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:01,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988666782] [2023-08-30 00:17:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:01,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:01,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:01,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:01,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:17:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:17:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:02,060 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:02,061 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 00:17:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:02,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:02,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988666782] [2023-08-30 00:17:02,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988666782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:02,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:02,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357035925] [2023-08-30 00:17:02,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:02,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:02,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:02,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:02,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 00:17:02,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 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 00:17:02,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:02,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 00:17:02,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:03,049 INFO L130 PetriNetUnfolder]: 5423/6918 cut-off events. [2023-08-30 00:17:03,049 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 00:17:03,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13966 conditions, 6918 events. 5423/6918 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 31474 event pairs, 2585 based on Foata normal form. 0/1869 useless extension candidates. Maximal degree in co-relation 5996. Up to 3433 conditions per place. [2023-08-30 00:17:03,088 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 00:17:03,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-08-30 00:17:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-30 00:17:03,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158974358974359 [2023-08-30 00:17:03,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-30 00:17:03,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-30 00:17:03,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:03,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-30 00:17:03,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:03,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:03,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:03,118 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 503 transitions. [2023-08-30 00:17:03,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-08-30 00:17:03,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:17:03,137 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-08-30 00:17:03,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 00:17:03,141 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-08-30 00:17:03,141 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-08-30 00:17:03,141 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 00:17:03,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:03,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:17:03,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 00:17:03,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:03,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:03,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash 24694, now seen corresponding path program 1 times [2023-08-30 00:17:03,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:03,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147503831] [2023-08-30 00:17:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:03,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:03,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:03,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:03,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:17:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:17:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:03,462 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 00:17:03,462 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 47 [2023-08-30 00:17:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:03,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:03,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147503831] [2023-08-30 00:17:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147503831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:03,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:03,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236756332] [2023-08-30 00:17:03,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:03,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:03,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 00:17:03,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 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 00:17:03,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:03,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 00:17:03,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:04,218 INFO L130 PetriNetUnfolder]: 4283/5526 cut-off events. [2023-08-30 00:17:04,218 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:17:04,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11063 conditions, 5526 events. 4283/5526 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 24927 event pairs, 2038 based on Foata normal form. 0/1545 useless extension candidates. Maximal degree in co-relation 5529. Up to 5466 conditions per place. [2023-08-30 00:17:04,243 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 00:17:04,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 182 flow [2023-08-30 00:17:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 00:17:04,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728205128205128 [2023-08-30 00:17:04,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 00:17:04,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 00:17:04,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:04,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 00:17:04,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:04,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:04,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:04,249 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 461 transitions. [2023-08-30 00:17:04,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 182 flow [2023-08-30 00:17:04,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:04,251 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 102 flow [2023-08-30 00:17:04,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-30 00:17:04,252 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-08-30 00:17:04,252 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 102 flow [2023-08-30 00:17:04,252 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 00:17:04,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:04,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:17:04,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:04,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:04,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 24695, now seen corresponding path program 1 times [2023-08-30 00:17:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068104173] [2023-08-30 00:17:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:04,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:04,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:04,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:04,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:17:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:04,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:17:04,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:04,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:04,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:04,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:04,593 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 00:17:04,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:17:04,613 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:17:04,614 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 00:17:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:04,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:04,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:04,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068104173] [2023-08-30 00:17:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068104173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:04,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882279362] [2023-08-30 00:17:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:04,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:04,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-08-30 00:17:04,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 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 00:17:04,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:04,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-08-30 00:17:04,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:05,151 INFO L130 PetriNetUnfolder]: 3133/4124 cut-off events. [2023-08-30 00:17:05,151 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:17:05,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8259 conditions, 4124 events. 3133/4124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18796 event pairs, 1488 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 8251. Up to 4064 conditions per place. [2023-08-30 00:17:05,163 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 00:17:05,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 174 flow [2023-08-30 00:17:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 00:17:05,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47384615384615386 [2023-08-30 00:17:05,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 00:17:05,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 00:17:05,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:05,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 00:17:05,167 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 00:17:05,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:05,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:05,169 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 102 flow. Second operand 3 states and 462 transitions. [2023-08-30 00:17:05,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 174 flow [2023-08-30 00:17:05,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:05,170 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 99 flow [2023-08-30 00:17:05,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 00:17:05,171 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 00:17:05,171 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 99 flow [2023-08-30 00:17:05,171 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 00:17:05,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:05,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:17:05,183 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 00:17:05,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:05,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:05,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash 24636, now seen corresponding path program 1 times [2023-08-30 00:17:05,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:05,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839800336] [2023-08-30 00:17:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:05,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:05,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:05,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:17:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:17:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:05,475 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:17:05,475 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 00:17:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:05,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:05,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839800336] [2023-08-30 00:17:05,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839800336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:05,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:05,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:05,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68705088] [2023-08-30 00:17:05,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:05,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:05,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:05,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:05,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:05,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 00:17:05,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 99 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 00:17:05,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:05,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 00:17:05,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:05,969 INFO L130 PetriNetUnfolder]: 3133/4122 cut-off events. [2023-08-30 00:17:05,969 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:17:05,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 4122 events. 3133/4122 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18721 event pairs, 1488 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 8247. Up to 4062 conditions per place. [2023-08-30 00:17:05,982 INFO L137 encePairwiseOnDemand]: 323/325 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 00:17:05,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 171 flow [2023-08-30 00:17:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 00:17:05,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687179487179487 [2023-08-30 00:17:05,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 00:17:05,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 00:17:05,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:05,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 00:17:05,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:05,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:05,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:05,987 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 99 flow. Second operand 3 states and 457 transitions. [2023-08-30 00:17:05,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 171 flow [2023-08-30 00:17:05,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:05,988 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 98 flow [2023-08-30 00:17:05,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=98, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-30 00:17:05,989 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 00:17:05,989 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 98 flow [2023-08-30 00:17:05,989 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 00:17:05,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:05,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:17:05,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:06,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:06,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:06,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash 765816, now seen corresponding path program 1 times [2023-08-30 00:17:06,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:06,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749558829] [2023-08-30 00:17:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:06,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:06,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:06,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:06,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:17:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:17:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:06,347 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:06,347 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 00:17:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:06,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:17:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:06,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749558829] [2023-08-30 00:17:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749558829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:17:06,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:17:06,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:17:06,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713637239] [2023-08-30 00:17:06,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:17:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:17:06,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:17:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:17:07,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 00:17:07,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:07,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:07,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 00:17:07,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:07,913 INFO L130 PetriNetUnfolder]: 4681/6166 cut-off events. [2023-08-30 00:17:07,913 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 00:17:07,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12347 conditions, 6166 events. 4681/6166 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 29403 event pairs, 2226 based on Foata normal form. 0/1998 useless extension candidates. Maximal degree in co-relation 12337. Up to 2030 conditions per place. [2023-08-30 00:17:07,935 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 101 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2023-08-30 00:17:07,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 111 transitions, 474 flow [2023-08-30 00:17:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:17:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:17:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 921 transitions. [2023-08-30 00:17:07,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723076923076923 [2023-08-30 00:17:07,938 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 921 transitions. [2023-08-30 00:17:07,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 921 transitions. [2023-08-30 00:17:07,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:07,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 921 transitions. [2023-08-30 00:17:07,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.5) internal successors, (921), 6 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:07,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:07,943 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:07,943 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 98 flow. Second operand 6 states and 921 transitions. [2023-08-30 00:17:07,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 111 transitions, 474 flow [2023-08-30 00:17:07,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 111 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:07,946 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 151 flow [2023-08-30 00:17:07,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-30 00:17:07,948 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-30 00:17:07,949 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 151 flow [2023-08-30 00:17:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:07,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:07,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:17:07,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:08,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:08,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:08,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash 23748567, now seen corresponding path program 1 times [2023-08-30 00:17:08,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:08,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644884666] [2023-08-30 00:17:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:08,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:08,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:08,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:08,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:17:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:17:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:08,270 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:17:08,270 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 00:17:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:08,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:08,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644884666] [2023-08-30 00:17:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644884666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:08,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465634299] [2023-08-30 00:17:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:08,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 00:17:08,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:08,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:08,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 00:17:08,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:08,861 INFO L130 PetriNetUnfolder]: 4440/5835 cut-off events. [2023-08-30 00:17:08,861 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 00:17:08,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 5835 events. 4440/5835 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 27722 event pairs, 2103 based on Foata normal form. 0/1884 useless extension candidates. Maximal degree in co-relation 11698. Up to 5745 conditions per place. [2023-08-30 00:17:08,878 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 00:17:08,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 227 flow [2023-08-30 00:17:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 00:17:08,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676923076923077 [2023-08-30 00:17:08,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 00:17:08,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 00:17:08,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:08,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 00:17:08,881 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 00:17:08,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:08,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:08,883 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 151 flow. Second operand 3 states and 456 transitions. [2023-08-30 00:17:08,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 227 flow [2023-08-30 00:17:08,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 43 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:08,884 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 139 flow [2023-08-30 00:17:08,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-30 00:17:08,885 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-30 00:17:08,885 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 139 flow [2023-08-30 00:17:08,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:08,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:08,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:17:08,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:09,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:09,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:09,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 23748568, now seen corresponding path program 1 times [2023-08-30 00:17:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245844956] [2023-08-30 00:17:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:09,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:09,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:09,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:09,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:17:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:09,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:17:09,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:09,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:09,219 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 00:17:09,220 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 00:17:09,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 00:17:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:09,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:09,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:09,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245844956] [2023-08-30 00:17:09,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245844956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:09,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:09,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:09,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145735754] [2023-08-30 00:17:09,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:09,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:09,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-08-30 00:17:09,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:09,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:09,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-08-30 00:17:09,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:09,805 INFO L130 PetriNetUnfolder]: 4179/5484 cut-off events. [2023-08-30 00:17:09,805 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:17:09,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11008 conditions, 5484 events. 4179/5484 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 25819 event pairs, 1974 based on Foata normal form. 0/1821 useless extension candidates. Maximal degree in co-relation 10992. Up to 5394 conditions per place. [2023-08-30 00:17:09,822 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 00:17:09,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 41 transitions, 211 flow [2023-08-30 00:17:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 00:17:09,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687179487179487 [2023-08-30 00:17:09,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 00:17:09,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 00:17:09,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:09,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 00:17:09,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:09,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:09,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:09,827 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 139 flow. Second operand 3 states and 457 transitions. [2023-08-30 00:17:09,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 41 transitions, 211 flow [2023-08-30 00:17:09,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:09,829 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 136 flow [2023-08-30 00:17:09,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-30 00:17:09,829 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-30 00:17:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 136 flow [2023-08-30 00:17:09,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:09,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:09,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:17:09,843 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 00:17:10,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:10,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:10,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash 736200986, now seen corresponding path program 1 times [2023-08-30 00:17:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:10,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517746406] [2023-08-30 00:17:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:10,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:10,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:17:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:17:10,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:10,167 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:10,168 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 00:17:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:10,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:10,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:10,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517746406] [2023-08-30 00:17:10,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517746406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:10,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:10,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:17:10,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565843857] [2023-08-30 00:17:10,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:10,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:17:10,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:17:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:17:10,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 00:17:10,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:10,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:10,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 00:17:10,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:11,103 INFO L130 PetriNetUnfolder]: 6348/8517 cut-off events. [2023-08-30 00:17:11,103 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 00:17:11,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17138 conditions, 8517 events. 6348/8517 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 44177 event pairs, 1608 based on Foata normal form. 0/3141 useless extension candidates. Maximal degree in co-relation 17121. Up to 4856 conditions per place. [2023-08-30 00:17:11,135 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 59 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-08-30 00:17:11,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 323 flow [2023-08-30 00:17:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:17:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:17:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-08-30 00:17:11,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523076923076923 [2023-08-30 00:17:11,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-08-30 00:17:11,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-08-30 00:17:11,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:11,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-08-30 00:17:11,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:11,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:11,178 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:11,178 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 136 flow. Second operand 5 states and 735 transitions. [2023-08-30 00:17:11,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 323 flow [2023-08-30 00:17:11,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:11,179 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 155 flow [2023-08-30 00:17:11,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-08-30 00:17:11,180 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-30 00:17:11,180 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 155 flow [2023-08-30 00:17:11,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:11,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:11,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:17:11,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:11,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:11,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:11,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:11,382 INFO L85 PathProgramCache]: Analyzing trace with hash 736200985, now seen corresponding path program 1 times [2023-08-30 00:17:11,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:11,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349928638] [2023-08-30 00:17:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:11,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:11,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:11,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:11,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:17:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:11,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:17:11,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:11,496 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:17:11,497 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 00:17:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:11,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:11,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:11,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349928638] [2023-08-30 00:17:11,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349928638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:11,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:17:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960944878] [2023-08-30 00:17:11,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:11,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:17:11,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:17:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:17:11,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 00:17:11,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:11,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:11,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 00:17:11,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:12,015 INFO L130 PetriNetUnfolder]: 2646/3708 cut-off events. [2023-08-30 00:17:12,015 INFO L131 PetriNetUnfolder]: For 304/433 co-relation queries the response was YES. [2023-08-30 00:17:12,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 3708 events. 2646/3708 cut-off events. For 304/433 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 18583 event pairs, 1431 based on Foata normal form. 129/2001 useless extension candidates. Maximal degree in co-relation 7991. Up to 3629 conditions per place. [2023-08-30 00:17:12,027 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 32 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2023-08-30 00:17:12,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 39 transitions, 221 flow [2023-08-30 00:17:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:17:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:17:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-30 00:17:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-08-30 00:17:12,029 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-30 00:17:12,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-30 00:17:12,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:12,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-30 00:17:12,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:12,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:12,032 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:12,032 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 155 flow. Second operand 4 states and 572 transitions. [2023-08-30 00:17:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 39 transitions, 221 flow [2023-08-30 00:17:12,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 211 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:17:12,034 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 147 flow [2023-08-30 00:17:12,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-30 00:17:12,034 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-30 00:17:12,035 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 147 flow [2023-08-30 00:17:12,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:12,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:12,035 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:17:12,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:12,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:12,241 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:12,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:12,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1341642493, now seen corresponding path program 2 times [2023-08-30 00:17:12,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:12,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853948506] [2023-08-30 00:17:12,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:17:12,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:12,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:12,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:12,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:17:12,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:17:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:17:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:17:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:12,380 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:12,381 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 00:17:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:12,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:17:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:12,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:12,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853948506] [2023-08-30 00:17:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853948506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:17:12,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:17:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:17:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640634086] [2023-08-30 00:17:12,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:17:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:17:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:17:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:17:15,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 325 [2023-08-30 00:17:15,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 147 flow. Second operand has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:15,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:15,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 325 [2023-08-30 00:17:15,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:19,105 INFO L130 PetriNetUnfolder]: 8767/12299 cut-off events. [2023-08-30 00:17:19,105 INFO L131 PetriNetUnfolder]: For 999/1438 co-relation queries the response was YES. [2023-08-30 00:17:19,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26044 conditions, 12299 events. 8767/12299 cut-off events. For 999/1438 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 70412 event pairs, 4743 based on Foata normal form. 445/6867 useless extension candidates. Maximal degree in co-relation 26025. Up to 1420 conditions per place. [2023-08-30 00:17:19,140 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 272 selfloop transitions, 12 changer transitions 0/287 dead transitions. [2023-08-30 00:17:19,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 287 transitions, 1391 flow [2023-08-30 00:17:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:17:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:17:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1912 transitions. [2023-08-30 00:17:19,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49025641025641026 [2023-08-30 00:17:19,146 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1912 transitions. [2023-08-30 00:17:19,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1912 transitions. [2023-08-30 00:17:19,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:19,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1912 transitions. [2023-08-30 00:17:19,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.33333333333334) internal successors, (1912), 12 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:19,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:19,154 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:19,154 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 147 flow. Second operand 12 states and 1912 transitions. [2023-08-30 00:17:19,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 287 transitions, 1391 flow [2023-08-30 00:17:19,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 287 transitions, 1378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:17:19,158 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 241 flow [2023-08-30 00:17:19,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=241, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-08-30 00:17:19,158 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-30 00:17:19,158 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 241 flow [2023-08-30 00:17:19,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:19,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:19,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:17:19,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-08-30 00:17:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:19,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:19,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1347553975, now seen corresponding path program 1 times [2023-08-30 00:17:19,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:19,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712273025] [2023-08-30 00:17:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:19,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:19,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:19,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:19,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:17:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:17:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:19,495 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 00:17:19,495 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 46 [2023-08-30 00:17:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:19,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:19,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:19,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712273025] [2023-08-30 00:17:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712273025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:19,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:19,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799912618] [2023-08-30 00:17:19,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:19,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:19,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:19,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:19,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-08-30 00:17:19,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 241 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 00:17:19,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:19,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-08-30 00:17:19,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:20,482 INFO L130 PetriNetUnfolder]: 8222/11474 cut-off events. [2023-08-30 00:17:20,482 INFO L131 PetriNetUnfolder]: For 912/1302 co-relation queries the response was YES. [2023-08-30 00:17:20,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24321 conditions, 11474 events. 8222/11474 cut-off events. For 912/1302 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65021 event pairs, 4430 based on Foata normal form. 390/6314 useless extension candidates. Maximal degree in co-relation 24295. Up to 11234 conditions per place. [2023-08-30 00:17:20,519 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 00:17:20,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 44 transitions, 319 flow [2023-08-30 00:17:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-30 00:17:20,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512820512820513 [2023-08-30 00:17:20,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-30 00:17:20,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-30 00:17:20,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:20,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-30 00:17:20,522 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 00:17:20,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:20,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:20,524 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 241 flow. Second operand 3 states and 440 transitions. [2023-08-30 00:17:20,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 44 transitions, 319 flow [2023-08-30 00:17:20,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 44 transitions, 294 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:17:20,526 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 214 flow [2023-08-30 00:17:20,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2023-08-30 00:17:20,526 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-30 00:17:20,526 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 214 flow [2023-08-30 00:17:20,527 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 00:17:20,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:20,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:17:20,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:20,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:20,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:20,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:20,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1347553976, now seen corresponding path program 1 times [2023-08-30 00:17:20,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:20,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41621296] [2023-08-30 00:17:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:20,732 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 00:17:20,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:20,733 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:20,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:17:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:20,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:17:20,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:20,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:17:20,869 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 00:17:20,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 00:17:20,890 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 130 treesize of output 126 [2023-08-30 00:17:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:20,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:20,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:20,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41621296] [2023-08-30 00:17:20,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41621296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:20,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:20,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:17:20,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449194208] [2023-08-30 00:17:20,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:20,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:17:20,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:17:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:17:21,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-08-30 00:17:21,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:21,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:21,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-08-30 00:17:21,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:21,916 INFO L130 PetriNetUnfolder]: 7632/10604 cut-off events. [2023-08-30 00:17:21,916 INFO L131 PetriNetUnfolder]: For 838/1188 co-relation queries the response was YES. [2023-08-30 00:17:21,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22444 conditions, 10604 events. 7632/10604 cut-off events. For 838/1188 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59078 event pairs, 4090 based on Foata normal form. 350/5974 useless extension candidates. Maximal degree in co-relation 22417. Up to 10364 conditions per place. [2023-08-30 00:17:21,957 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 00:17:21,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 42 transitions, 288 flow [2023-08-30 00:17:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:17:21,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:17:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 00:17:21,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-30 00:17:21,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 00:17:21,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 00:17:21,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:21,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 00:17:21,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:21,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:21,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:21,962 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 214 flow. Second operand 3 states and 450 transitions. [2023-08-30 00:17:21,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 42 transitions, 288 flow [2023-08-30 00:17:21,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 42 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:21,964 INFO L231 Difference]: Finished difference. Result has 63 places, 42 transitions, 211 flow [2023-08-30 00:17:21,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=63, PETRI_TRANSITIONS=42} [2023-08-30 00:17:21,965 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-30 00:17:21,965 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 42 transitions, 211 flow [2023-08-30 00:17:21,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:21,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:21,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:17:21,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:22,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:22,172 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:22,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1347396625, now seen corresponding path program 1 times [2023-08-30 00:17:22,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:22,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538383073] [2023-08-30 00:17:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:22,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:22,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:22,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:22,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:17:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:17:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:22,302 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:22,302 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 00:17:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:22,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:22,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538383073] [2023-08-30 00:17:22,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538383073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:22,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:22,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:17:22,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491863781] [2023-08-30 00:17:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:22,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:17:22,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:17:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:17:22,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 00:17:22,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 42 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:22,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:22,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 00:17:22,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:23,687 INFO L130 PetriNetUnfolder]: 8060/11214 cut-off events. [2023-08-30 00:17:23,687 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-08-30 00:17:23,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23955 conditions, 11214 events. 8060/11214 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 62059 event pairs, 4404 based on Foata normal form. 26/6339 useless extension candidates. Maximal degree in co-relation 23927. Up to 10733 conditions per place. [2023-08-30 00:17:23,718 INFO L137 encePairwiseOnDemand]: 318/325 looper letters, 64 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-30 00:17:23,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 418 flow [2023-08-30 00:17:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:17:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:17:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-08-30 00:17:23,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523076923076923 [2023-08-30 00:17:23,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-08-30 00:17:23,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-08-30 00:17:23,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:23,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-08-30 00:17:23,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:23,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:23,724 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:23,724 INFO L175 Difference]: Start difference. First operand has 63 places, 42 transitions, 211 flow. Second operand 5 states and 735 transitions. [2023-08-30 00:17:23,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 418 flow [2023-08-30 00:17:23,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:17:23,727 INFO L231 Difference]: Finished difference. Result has 69 places, 44 transitions, 249 flow [2023-08-30 00:17:23,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=69, PETRI_TRANSITIONS=44} [2023-08-30 00:17:23,727 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-30 00:17:23,728 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 44 transitions, 249 flow [2023-08-30 00:17:23,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:23,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:23,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:23,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:23,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:23,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:23,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:23,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1175503872, now seen corresponding path program 1 times [2023-08-30 00:17:23,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:23,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58805971] [2023-08-30 00:17:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:23,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:23,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:23,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:17:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:17:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:24,063 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:24,063 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 00:17:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:24,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:24,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:24,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58805971] [2023-08-30 00:17:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58805971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:24,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:17:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311347012] [2023-08-30 00:17:24,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:24,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:17:24,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:17:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:17:24,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 325 [2023-08-30 00:17:24,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 44 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:24,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:24,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 325 [2023-08-30 00:17:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:25,905 INFO L130 PetriNetUnfolder]: 11300/15840 cut-off events. [2023-08-30 00:17:25,905 INFO L131 PetriNetUnfolder]: For 10344/10849 co-relation queries the response was YES. [2023-08-30 00:17:25,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41480 conditions, 15840 events. 11300/15840 cut-off events. For 10344/10849 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 95665 event pairs, 4697 based on Foata normal form. 504/13019 useless extension candidates. Maximal degree in co-relation 41448. Up to 10233 conditions per place. [2023-08-30 00:17:25,964 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 51 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2023-08-30 00:17:25,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 423 flow [2023-08-30 00:17:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:17:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:17:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 714 transitions. [2023-08-30 00:17:25,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393846153846154 [2023-08-30 00:17:25,966 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 714 transitions. [2023-08-30 00:17:25,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 714 transitions. [2023-08-30 00:17:25,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:25,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 714 transitions. [2023-08-30 00:17:25,968 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 00:17:25,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:25,970 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:25,970 INFO L175 Difference]: Start difference. First operand has 69 places, 44 transitions, 249 flow. Second operand 5 states and 714 transitions. [2023-08-30 00:17:25,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 423 flow [2023-08-30 00:17:25,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 413 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 00:17:25,972 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 267 flow [2023-08-30 00:17:25,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2023-08-30 00:17:25,973 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-08-30 00:17:25,973 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 267 flow [2023-08-30 00:17:25,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:25,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:25,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:25,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:26,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:26,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:26,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1352999476, now seen corresponding path program 1 times [2023-08-30 00:17:26,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:26,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455840197] [2023-08-30 00:17:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:26,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:26,223 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:26,224 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 (16)] Waiting until timeout for monitored process [2023-08-30 00:17:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:17:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:26,423 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:26,424 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 00:17:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:17:26,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:17:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:17:26,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:26,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455840197] [2023-08-30 00:17:26,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455840197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:17:26,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:17:26,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:17:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235168019] [2023-08-30 00:17:26,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:17:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:17:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:17:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:17:28,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-08-30 00:17:28,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:28,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:28,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-08-30 00:17:28,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:30,882 INFO L130 PetriNetUnfolder]: 16800/23217 cut-off events. [2023-08-30 00:17:30,882 INFO L131 PetriNetUnfolder]: For 23348/25607 co-relation queries the response was YES. [2023-08-30 00:17:30,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64998 conditions, 23217 events. 16800/23217 cut-off events. For 23348/25607 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 145647 event pairs, 2153 based on Foata normal form. 2139/22212 useless extension candidates. Maximal degree in co-relation 64965. Up to 6057 conditions per place. [2023-08-30 00:17:30,979 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 96 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2023-08-30 00:17:30,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 112 transitions, 717 flow [2023-08-30 00:17:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:17:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:17:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1157 transitions. [2023-08-30 00:17:30,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2023-08-30 00:17:30,982 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1157 transitions. [2023-08-30 00:17:30,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1157 transitions. [2023-08-30 00:17:30,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:30,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1157 transitions. [2023-08-30 00:17:30,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:30,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:30,988 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:30,988 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 267 flow. Second operand 8 states and 1157 transitions. [2023-08-30 00:17:30,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 112 transitions, 717 flow [2023-08-30 00:17:30,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:17:30,992 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 327 flow [2023-08-30 00:17:30,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-08-30 00:17:30,993 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 29 predicate places. [2023-08-30 00:17:30,993 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 327 flow [2023-08-30 00:17:30,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:30,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:30,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:31,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:31,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:31,203 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:31,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1293681852, now seen corresponding path program 1 times [2023-08-30 00:17:31,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:31,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862740095] [2023-08-30 00:17:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:31,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:31,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:31,204 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:17:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:31,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:17:31,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:31,466 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:31,466 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 00:17:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:17:31,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:17:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:17:31,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862740095] [2023-08-30 00:17:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862740095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:17:31,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:17:31,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:17:31,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961616097] [2023-08-30 00:17:31,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:17:31,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:17:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:17:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:17:33,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-08-30 00:17:33,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:33,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:33,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-08-30 00:17:33,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:38,934 INFO L130 PetriNetUnfolder]: 34898/46998 cut-off events. [2023-08-30 00:17:38,934 INFO L131 PetriNetUnfolder]: For 70209/71264 co-relation queries the response was YES. [2023-08-30 00:17:39,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151260 conditions, 46998 events. 34898/46998 cut-off events. For 70209/71264 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 296523 event pairs, 5669 based on Foata normal form. 4321/46085 useless extension candidates. Maximal degree in co-relation 151223. Up to 12744 conditions per place. [2023-08-30 00:17:39,210 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 117 selfloop transitions, 13 changer transitions 0/133 dead transitions. [2023-08-30 00:17:39,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 995 flow [2023-08-30 00:17:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:17:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:17:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1137 transitions. [2023-08-30 00:17:39,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373076923076923 [2023-08-30 00:17:39,213 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1137 transitions. [2023-08-30 00:17:39,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1137 transitions. [2023-08-30 00:17:39,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:39,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1137 transitions. [2023-08-30 00:17:39,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.125) internal successors, (1137), 8 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:39,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:39,218 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:39,218 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 327 flow. Second operand 8 states and 1137 transitions. [2023-08-30 00:17:39,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 995 flow [2023-08-30 00:17:39,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 133 transitions, 941 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 00:17:39,265 INFO L231 Difference]: Finished difference. Result has 88 places, 55 transitions, 392 flow [2023-08-30 00:17:39,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=392, PETRI_PLACES=88, PETRI_TRANSITIONS=55} [2023-08-30 00:17:39,265 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 37 predicate places. [2023-08-30 00:17:39,266 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 55 transitions, 392 flow [2023-08-30 00:17:39,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:39,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:39,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:39,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-08-30 00:17:39,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:39,473 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:39,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash -78301802, now seen corresponding path program 1 times [2023-08-30 00:17:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:39,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058664623] [2023-08-30 00:17:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:39,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:39,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:39,475 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:39,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:17:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:39,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:17:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:39,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:17:39,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:39,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058664623] [2023-08-30 00:17:39,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058664623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:17:39,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:17:39,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:17:39,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328309510] [2023-08-30 00:17:39,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:17:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:17:39,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:39,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:17:39,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:17:39,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-08-30 00:17:39,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 55 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:39,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:39,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-08-30 00:17:39,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:44,123 INFO L130 PetriNetUnfolder]: 28139/39191 cut-off events. [2023-08-30 00:17:44,124 INFO L131 PetriNetUnfolder]: For 123215/127518 co-relation queries the response was YES. [2023-08-30 00:17:44,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147649 conditions, 39191 events. 28139/39191 cut-off events. For 123215/127518 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 236003 event pairs, 19691 based on Foata normal form. 4302/40943 useless extension candidates. Maximal degree in co-relation 147608. Up to 38858 conditions per place. [2023-08-30 00:17:44,376 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 71 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-30 00:17:44,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 612 flow [2023-08-30 00:17:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:17:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:17:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2023-08-30 00:17:44,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45353846153846156 [2023-08-30 00:17:44,378 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2023-08-30 00:17:44,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2023-08-30 00:17:44,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:44,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2023-08-30 00:17:44,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:44,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:44,382 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:44,382 INFO L175 Difference]: Start difference. First operand has 88 places, 55 transitions, 392 flow. Second operand 5 states and 737 transitions. [2023-08-30 00:17:44,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 612 flow [2023-08-30 00:17:44,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 595 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 00:17:44,467 INFO L231 Difference]: Finished difference. Result has 91 places, 56 transitions, 392 flow [2023-08-30 00:17:44,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=91, PETRI_TRANSITIONS=56} [2023-08-30 00:17:44,468 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2023-08-30 00:17:44,468 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 56 transitions, 392 flow [2023-08-30 00:17:44,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:44,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:44,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:44,477 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 00:17:44,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:44,673 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:44,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1453874683, now seen corresponding path program 1 times [2023-08-30 00:17:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433895962] [2023-08-30 00:17:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:17:44,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:44,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:44,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:44,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:17:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:17:44,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:17:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:44,825 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:44,826 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 00:17:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:44,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:17:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:45,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433895962] [2023-08-30 00:17:45,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433895962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:17:45,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:17:45,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:17:45,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053110689] [2023-08-30 00:17:45,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:17:45,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:17:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:17:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:17:48,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-08-30 00:17:48,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 56 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:48,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:48,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-08-30 00:17:48,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:56,732 INFO L130 PetriNetUnfolder]: 29193/40489 cut-off events. [2023-08-30 00:17:56,732 INFO L131 PetriNetUnfolder]: For 119360/123737 co-relation queries the response was YES. [2023-08-30 00:17:56,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152081 conditions, 40489 events. 29193/40489 cut-off events. For 119360/123737 co-relation queries the response was YES. Maximal size of possible extension queue 1317. Compared 245131 event pairs, 13907 based on Foata normal form. 5124/45355 useless extension candidates. Maximal degree in co-relation 152038. Up to 20281 conditions per place. [2023-08-30 00:17:57,039 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 196 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2023-08-30 00:17:57,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 217 transitions, 1703 flow [2023-08-30 00:17:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:17:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:17:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1915 transitions. [2023-08-30 00:17:57,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208791208791209 [2023-08-30 00:17:57,045 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1915 transitions. [2023-08-30 00:17:57,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1915 transitions. [2023-08-30 00:17:57,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:57,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1915 transitions. [2023-08-30 00:17:57,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.78571428571428) internal successors, (1915), 14 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:57,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:57,052 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:57,052 INFO L175 Difference]: Start difference. First operand has 91 places, 56 transitions, 392 flow. Second operand 14 states and 1915 transitions. [2023-08-30 00:17:57,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 217 transitions, 1703 flow [2023-08-30 00:17:57,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 217 transitions, 1698 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:17:57,459 INFO L231 Difference]: Finished difference. Result has 106 places, 62 transitions, 478 flow [2023-08-30 00:17:57,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=478, PETRI_PLACES=106, PETRI_TRANSITIONS=62} [2023-08-30 00:17:57,460 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2023-08-30 00:17:57,460 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 62 transitions, 478 flow [2023-08-30 00:17:57,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:57,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:57,460 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:57,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:17:57,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:57,661 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:17:57,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:57,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1063204671, now seen corresponding path program 2 times [2023-08-30 00:17:57,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:57,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490534104] [2023-08-30 00:17:57,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:17:57,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:57,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:57,662 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:57,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:17:57,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:17:57,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:17:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:17:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:57,858 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:17:57,858 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 00:17:58,049 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 00:17:58,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:17:58,759 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 00:17:58,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:58,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490534104] [2023-08-30 00:17:58,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490534104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:17:58,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:17:58,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:17:58,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066971541] [2023-08-30 00:17:58,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:17:58,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:17:58,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:17:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:18:05,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-08-30 00:18:05,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 62 transitions, 478 flow. Second operand has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:05,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:18:05,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-08-30 00:18:05,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:18:16,965 INFO L130 PetriNetUnfolder]: 31425/42833 cut-off events. [2023-08-30 00:18:16,965 INFO L131 PetriNetUnfolder]: For 155297/162220 co-relation queries the response was YES. [2023-08-30 00:18:17,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179906 conditions, 42833 events. 31425/42833 cut-off events. For 155297/162220 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 272237 event pairs, 8023 based on Foata normal form. 5711/48061 useless extension candidates. Maximal degree in co-relation 179859. Up to 14818 conditions per place. [2023-08-30 00:18:17,263 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 366 selfloop transitions, 27 changer transitions 0/398 dead transitions. [2023-08-30 00:18:17,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 398 transitions, 3218 flow [2023-08-30 00:18:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 00:18:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 00:18:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3066 transitions. [2023-08-30 00:18:17,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288111888111888 [2023-08-30 00:18:17,270 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3066 transitions. [2023-08-30 00:18:17,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3066 transitions. [2023-08-30 00:18:17,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:18:17,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3066 transitions. [2023-08-30 00:18:17,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 139.36363636363637) internal successors, (3066), 22 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:17,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 325.0) internal successors, (7475), 23 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:17,279 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 325.0) internal successors, (7475), 23 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:17,279 INFO L175 Difference]: Start difference. First operand has 106 places, 62 transitions, 478 flow. Second operand 22 states and 3066 transitions. [2023-08-30 00:18:17,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 398 transitions, 3218 flow [2023-08-30 00:18:17,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 398 transitions, 3158 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-30 00:18:17,637 INFO L231 Difference]: Finished difference. Result has 121 places, 79 transitions, 617 flow [2023-08-30 00:18:17,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=617, PETRI_PLACES=121, PETRI_TRANSITIONS=79} [2023-08-30 00:18:17,637 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2023-08-30 00:18:17,637 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 79 transitions, 617 flow [2023-08-30 00:18:17,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:17,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:18:17,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:18:17,647 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 (20)] Ended with exit code 0 [2023-08-30 00:18:17,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:18:17,838 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:18:17,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:18:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1368264792, now seen corresponding path program 1 times [2023-08-30 00:18:17,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:18:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792060007] [2023-08-30 00:18:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:18:17,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:18:17,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:18:17,840 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:18:17,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:18:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:18:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:18:17,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:18:18,009 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:18:18,009 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 00:18:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:18,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:18:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:19,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:18:19,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792060007] [2023-08-30 00:18:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792060007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:18:19,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:18:19,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 00:18:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462169722] [2023-08-30 00:18:19,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:18:19,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:18:19,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:18:19,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:18:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:18:26,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 325 [2023-08-30 00:18:26,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 79 transitions, 617 flow. Second operand has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:26,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:18:26,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 325 [2023-08-30 00:18:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:18:39,421 INFO L130 PetriNetUnfolder]: 36552/50332 cut-off events. [2023-08-30 00:18:39,421 INFO L131 PetriNetUnfolder]: For 202290/207962 co-relation queries the response was YES. [2023-08-30 00:18:39,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220240 conditions, 50332 events. 36552/50332 cut-off events. For 202290/207962 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 314379 event pairs, 13719 based on Foata normal form. 6137/56227 useless extension candidates. Maximal degree in co-relation 220193. Up to 13528 conditions per place. [2023-08-30 00:18:39,788 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 403 selfloop transitions, 37 changer transitions 0/445 dead transitions. [2023-08-30 00:18:39,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 445 transitions, 4001 flow [2023-08-30 00:18:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 00:18:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 00:18:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3138 transitions. [2023-08-30 00:18:39,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41979933110367895 [2023-08-30 00:18:39,792 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3138 transitions. [2023-08-30 00:18:39,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3138 transitions. [2023-08-30 00:18:39,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:18:39,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3138 transitions. [2023-08-30 00:18:39,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 136.43478260869566) internal successors, (3138), 23 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:39,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 325.0) internal successors, (7800), 24 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:39,801 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 325.0) internal successors, (7800), 24 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:39,801 INFO L175 Difference]: Start difference. First operand has 121 places, 79 transitions, 617 flow. Second operand 23 states and 3138 transitions. [2023-08-30 00:18:39,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 445 transitions, 4001 flow [2023-08-30 00:18:40,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 445 transitions, 3802 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-08-30 00:18:40,274 INFO L231 Difference]: Finished difference. Result has 144 places, 98 transitions, 824 flow [2023-08-30 00:18:40,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=824, PETRI_PLACES=144, PETRI_TRANSITIONS=98} [2023-08-30 00:18:40,275 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2023-08-30 00:18:40,275 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 98 transitions, 824 flow [2023-08-30 00:18:40,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:40,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:18:40,275 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:18:40,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:18:40,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:18:40,483 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:18:40,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:18:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash 940733725, now seen corresponding path program 3 times [2023-08-30 00:18:40,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:18:40,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902172840] [2023-08-30 00:18:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:18:40,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:18:40,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:18:40,485 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:18:40,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:18:40,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:18:40,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:18:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:18:40,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:18:40,696 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:18:40,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:18:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:40,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:18:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:42,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:18:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902172840] [2023-08-30 00:18:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902172840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:18:42,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:18:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:18:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778752430] [2023-08-30 00:18:42,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:18:42,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:18:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:18:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:18:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:18:53,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 325 [2023-08-30 00:18:53,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 98 transitions, 824 flow. Second operand has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:53,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:18:53,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 325 [2023-08-30 00:18:53,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:23,204 INFO L130 PetriNetUnfolder]: 75849/103092 cut-off events. [2023-08-30 00:19:23,205 INFO L131 PetriNetUnfolder]: For 685350/703533 co-relation queries the response was YES. [2023-08-30 00:19:23,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527494 conditions, 103092 events. 75849/103092 cut-off events. For 685350/703533 co-relation queries the response was YES. Maximal size of possible extension queue 2504. Compared 664603 event pairs, 47074 based on Foata normal form. 12412/114867 useless extension candidates. Maximal degree in co-relation 527440. Up to 27419 conditions per place. [2023-08-30 00:19:24,549 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 750 selfloop transitions, 24 changer transitions 0/785 dead transitions. [2023-08-30 00:19:24,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 785 transitions, 6972 flow [2023-08-30 00:19:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:19:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:19:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3777 transitions. [2023-08-30 00:19:24,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48423076923076924 [2023-08-30 00:19:24,554 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3777 transitions. [2023-08-30 00:19:24,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3777 transitions. [2023-08-30 00:19:24,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:24,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3777 transitions. [2023-08-30 00:19:24,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 157.375) internal successors, (3777), 24 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:24,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:24,563 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:24,563 INFO L175 Difference]: Start difference. First operand has 144 places, 98 transitions, 824 flow. Second operand 24 states and 3777 transitions. [2023-08-30 00:19:24,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 785 transitions, 6972 flow [2023-08-30 00:19:29,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 785 transitions, 6887 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-08-30 00:19:29,581 INFO L231 Difference]: Finished difference. Result has 171 places, 111 transitions, 938 flow [2023-08-30 00:19:29,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=938, PETRI_PLACES=171, PETRI_TRANSITIONS=111} [2023-08-30 00:19:29,582 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2023-08-30 00:19:29,582 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 111 transitions, 938 flow [2023-08-30 00:19:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:29,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:29,583 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 00:19:29,594 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 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:19:29,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:29,783 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:19:29,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2142395825, now seen corresponding path program 3 times [2023-08-30 00:19:29,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:29,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685667489] [2023-08-30 00:19:29,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:19:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:29,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:29,785 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:29,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:19:30,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:19:30,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:19:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:19:30,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:30,094 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:19:30,094 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 00:19:30,380 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 00:19:30,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:19:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:19:31,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:31,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685667489] [2023-08-30 00:19:31,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685667489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:19:31,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:19:31,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 00:19:31,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422657210] [2023-08-30 00:19:31,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:19:31,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:19:31,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:31,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:19:31,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:19:43,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-08-30 00:19:43,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 111 transitions, 938 flow. Second operand has 21 states, 21 states have (on average 132.14285714285714) internal successors, (2775), 21 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:43,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:43,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-08-30 00:19:43,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:05,990 INFO L130 PetriNetUnfolder]: 81245/110531 cut-off events. [2023-08-30 00:20:05,990 INFO L131 PetriNetUnfolder]: For 713667/730534 co-relation queries the response was YES. [2023-08-30 00:20:06,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559228 conditions, 110531 events. 81245/110531 cut-off events. For 713667/730534 co-relation queries the response was YES. Maximal size of possible extension queue 2714. Compared 725465 event pairs, 39973 based on Foata normal form. 12758/121362 useless extension candidates. Maximal degree in co-relation 559163. Up to 81581 conditions per place. [2023-08-30 00:20:07,394 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 520 selfloop transitions, 48 changer transitions 0/575 dead transitions. [2023-08-30 00:20:07,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 575 transitions, 5014 flow [2023-08-30 00:20:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 00:20:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 00:20:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3617 transitions. [2023-08-30 00:20:07,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516923076923076 [2023-08-30 00:20:07,399 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3617 transitions. [2023-08-30 00:20:07,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3617 transitions. [2023-08-30 00:20:07,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:07,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3617 transitions. [2023-08-30 00:20:07,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 144.68) internal successors, (3617), 25 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:07,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 325.0) internal successors, (8450), 26 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:07,406 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 325.0) internal successors, (8450), 26 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:07,406 INFO L175 Difference]: Start difference. First operand has 171 places, 111 transitions, 938 flow. Second operand 25 states and 3617 transitions. [2023-08-30 00:20:07,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 575 transitions, 5014 flow [2023-08-30 00:20:13,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 575 transitions, 4966 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 00:20:13,999 INFO L231 Difference]: Finished difference. Result has 194 places, 138 transitions, 1339 flow [2023-08-30 00:20:13,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1339, PETRI_PLACES=194, PETRI_TRANSITIONS=138} [2023-08-30 00:20:14,000 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 143 predicate places. [2023-08-30 00:20:14,000 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 138 transitions, 1339 flow [2023-08-30 00:20:14,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 132.14285714285714) internal successors, (2775), 21 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:14,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:14,001 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:20:14,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:20:14,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:14,202 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:20:14,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:14,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1336985445, now seen corresponding path program 2 times [2023-08-30 00:20:14,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:14,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303638840] [2023-08-30 00:20:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:20:14,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:14,204 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:20:14,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:20:14,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:20:14,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:20:14,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:20:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:14,401 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:20:14,401 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 00:20:14,610 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 00:20:14,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:15,432 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 00:20:15,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303638840] [2023-08-30 00:20:15,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303638840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:15,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:15,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:20:15,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36707112] [2023-08-30 00:20:15,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:15,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:20:15,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:15,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:20:15,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:20:22,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-08-30 00:20:22,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 138 transitions, 1339 flow. Second operand has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:22,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:22,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-08-30 00:20:22,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:46,304 INFO L130 PetriNetUnfolder]: 91935/125106 cut-off events. [2023-08-30 00:20:46,304 INFO L131 PetriNetUnfolder]: For 1082214/1097059 co-relation queries the response was YES. [2023-08-30 00:20:47,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702607 conditions, 125106 events. 91935/125106 cut-off events. For 1082214/1097059 co-relation queries the response was YES. Maximal size of possible extension queue 3106. Compared 833546 event pairs, 50648 based on Foata normal form. 8041/131867 useless extension candidates. Maximal degree in co-relation 702532. Up to 102790 conditions per place. [2023-08-30 00:20:47,896 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 412 selfloop transitions, 35 changer transitions 0/459 dead transitions. [2023-08-30 00:20:47,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 459 transitions, 4669 flow [2023-08-30 00:20:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 00:20:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 00:20:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2581 transitions. [2023-08-30 00:20:47,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411965811965812 [2023-08-30 00:20:47,900 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2581 transitions. [2023-08-30 00:20:47,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2581 transitions. [2023-08-30 00:20:47,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:47,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2581 transitions. [2023-08-30 00:20:47,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 143.38888888888889) internal successors, (2581), 18 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:47,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:47,905 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:47,905 INFO L175 Difference]: Start difference. First operand has 194 places, 138 transitions, 1339 flow. Second operand 18 states and 2581 transitions. [2023-08-30 00:20:47,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 459 transitions, 4669 flow [2023-08-30 00:20:51,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 459 transitions, 4412 flow, removed 117 selfloop flow, removed 8 redundant places. [2023-08-30 00:20:51,843 INFO L231 Difference]: Finished difference. Result has 209 places, 154 transitions, 1551 flow [2023-08-30 00:20:51,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1551, PETRI_PLACES=209, PETRI_TRANSITIONS=154} [2023-08-30 00:20:51,843 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2023-08-30 00:20:51,844 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 154 transitions, 1551 flow [2023-08-30 00:20:51,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:51,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:51,844 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-30 00:20:51,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:20:52,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:52,046 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:20:52,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:52,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1278902246, now seen corresponding path program 4 times [2023-08-30 00:20:52,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:52,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240609470] [2023-08-30 00:20:52,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:20:52,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:52,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:52,047 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:20:52,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:20:52,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:20:52,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:20:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:20:52,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:52,231 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:20:52,231 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 00:20:52,400 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 00:20:52,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:53,155 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 00:20:53,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240609470] [2023-08-30 00:20:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240609470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:53,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:53,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 00:20:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538662682] [2023-08-30 00:20:53,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:20:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:20:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:20:57,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-08-30 00:20:57,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 154 transitions, 1551 flow. Second operand has 16 states, 16 states have (on average 134.25) internal successors, (2148), 16 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:57,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:57,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-08-30 00:20:57,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:43,985 INFO L130 PetriNetUnfolder]: 181718/248622 cut-off events. [2023-08-30 00:21:43,985 INFO L131 PetriNetUnfolder]: For 3179601/3223940 co-relation queries the response was YES. [2023-08-30 00:21:46,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477904 conditions, 248622 events. 181718/248622 cut-off events. For 3179601/3223940 co-relation queries the response was YES. Maximal size of possible extension queue 5742. Compared 1834813 event pairs, 10288 based on Foata normal form. 37218/285506 useless extension candidates. Maximal degree in co-relation 1477823. Up to 62627 conditions per place. [2023-08-30 00:21:47,758 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 510 selfloop transitions, 46 changer transitions 0/566 dead transitions. [2023-08-30 00:21:47,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 566 transitions, 6572 flow [2023-08-30 00:21:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:21:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:21:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2078 transitions. [2023-08-30 00:21:47,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567032967032967 [2023-08-30 00:21:47,761 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2078 transitions. [2023-08-30 00:21:47,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2078 transitions. [2023-08-30 00:21:47,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:47,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2078 transitions. [2023-08-30 00:21:47,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 148.42857142857142) internal successors, (2078), 14 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:47,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:47,766 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:47,766 INFO L175 Difference]: Start difference. First operand has 209 places, 154 transitions, 1551 flow. Second operand 14 states and 2078 transitions. [2023-08-30 00:21:47,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 566 transitions, 6572 flow [2023-08-30 00:21:56,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 566 transitions, 6479 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-08-30 00:21:56,844 INFO L231 Difference]: Finished difference. Result has 225 places, 162 transitions, 1751 flow [2023-08-30 00:21:56,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1751, PETRI_PLACES=225, PETRI_TRANSITIONS=162} [2023-08-30 00:21:56,844 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 174 predicate places. [2023-08-30 00:21:56,844 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 162 transitions, 1751 flow [2023-08-30 00:21:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 134.25) internal successors, (2148), 16 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:56,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:56,845 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:21:56,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:57,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:57,045 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 00:21:57,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash -888232234, now seen corresponding path program 2 times [2023-08-30 00:21:57,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:57,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128028398] [2023-08-30 00:21:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:21:57,046 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 00:21:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:57,047 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:57,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:21:57,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:21:57,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:21:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:21:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:57,213 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:21:57,214 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 00:21:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:21:57,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:57,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:57,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128028398] [2023-08-30 00:21:57,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128028398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:57,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:57,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:21:57,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449177333] [2023-08-30 00:21:57,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:57,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:21:57,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:21:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:21:57,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-08-30 00:21:57,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 162 transitions, 1751 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:57,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:57,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-08-30 00:21:57,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand