./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-min-max-inc.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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:03:16,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:03:16,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:03:16,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:03:16,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:03:16,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:03:16,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:03:16,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:03:16,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:03:16,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:03:16,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:03:16,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:03:16,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:03:16,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:03:16,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:03:16,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:03:16,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:03:16,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:03:16,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:03:16,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:03:16,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:03:16,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:03:16,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:03:16,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:03:16,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:03:16,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:03:16,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:03:16,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:03:16,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:03:16,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:03:16,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:03:16,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:03:16,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:03:16,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:03:16,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:03:16,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:03:16,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:03:16,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:03:16,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:03:16,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:03:16,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:03:16,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:03:16,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:03:16,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:03:16,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:03:16,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:03:16,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:03:16,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:03:16,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:03:16,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:03:16,825 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:03:16,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:03:16,826 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:03:16,826 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:03:16,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:03:16,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:03:16,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:03:16,826 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:03:16,827 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:03:16,827 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:03:16,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:03:16,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:03:16,827 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:03:16,827 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:03:16,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:03:16,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:03:16,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:03:16,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:03:16,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:03:16,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:03:16,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:03:16,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:03:16,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:03:16,829 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:03:16,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:03:16,829 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:03:16,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:03:17,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:03:17,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:03:17,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:03:17,170 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:03:17,170 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:03:17,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-09-01 03:03:18,233 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:03:18,449 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:03:18,450 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-09-01 03:03:18,456 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3ff3e8a/84f3c07c26094c79a169a3310d82a3bc/FLAG4131fdb3a [2023-09-01 03:03:18,467 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3ff3e8a/84f3c07c26094c79a169a3310d82a3bc [2023-09-01 03:03:18,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:03:18,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:03:18,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:03:18,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:03:18,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:03:18,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:03:18" (1/1) ... [2023-09-01 03:03:18,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143ac5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:18, skipping insertion in model container [2023-09-01 03:03:18,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:03:18" (1/1) ... [2023-09-01 03:03:18,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:03:18,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:03:18,645 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-min-max-inc.wvr.c[3018,3031] [2023-09-01 03:03:18,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:03:18,668 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) [2023-09-01 03:03:18,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61cb21aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:18, skipping insertion in model container [2023-09-01 03:03:18,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:03:18,670 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:03:18,671 INFO L158 Benchmark]: Toolchain (without parser) took 200.29ms. Allocated memory is still 56.6MB. Free memory was 33.7MB in the beginning and 23.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:03:18,672 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 46.1MB. Free memory was 23.8MB in the beginning and 23.7MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:03:18,672 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.69ms. Allocated memory is still 56.6MB. Free memory was 33.4MB in the beginning and 23.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:03:18,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 46.1MB. Free memory was 23.8MB in the beginning and 23.7MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 198.69ms. Allocated memory is still 56.6MB. Free memory was 33.4MB in the beginning and 23.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: 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-min-max-inc.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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:03:20,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:03:20,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:03:20,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:03:20,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:03:20,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:03:20,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:03:20,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:03:20,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:03:20,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:03:20,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:03:20,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:03:20,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:03:20,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:03:20,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:03:20,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:03:20,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:03:20,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:03:20,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:03:20,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:03:20,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:03:20,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:03:20,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:03:20,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:03:20,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:03:20,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:03:20,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:03:20,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:03:20,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:03:20,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:03:20,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:03:20,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:03:20,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:03:20,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:03:20,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:03:20,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:03:20,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:03:20,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:03:20,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:03:20,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:03:20,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:03:20,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:03:20,743 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:03:20,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:03:20,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:03:20,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:03:20,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:03:20,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:03:20,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:03:20,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:03:20,746 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:03:20,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:03:20,746 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:03:20,746 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:03:20,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:03:20,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:03:20,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:03:20,747 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:03:20,747 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:03:20,747 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:03:20,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:03:20,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:03:20,748 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:03:20,748 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:03:20,748 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:03:20,748 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:03:20,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:03:20,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:03:20,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:03:20,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:03:20,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:03:20,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:03:20,751 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:03:20,751 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:03:20,751 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:03:20,752 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:03:20,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:03:20,752 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:03:20,752 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:03:20,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:03:21,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:03:21,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:03:21,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:03:21,075 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:03:21,075 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:03:21,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-09-01 03:03:22,190 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:03:22,377 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:03:22,378 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-09-01 03:03:22,384 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7e00a0b/ac37b9a33182406b961abed6455c0737/FLAGba9154ef5 [2023-09-01 03:03:22,408 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7e00a0b/ac37b9a33182406b961abed6455c0737 [2023-09-01 03:03:22,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:03:22,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:03:22,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:03:22,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:03:22,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:03:22,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780a13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22, skipping insertion in model container [2023-09-01 03:03:22,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:03:22,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:03:22,603 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-min-max-inc.wvr.c[3018,3031] [2023-09-01 03:03:22,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:03:22,640 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:03:22,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:03:22,676 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-min-max-inc.wvr.c[3018,3031] [2023-09-01 03:03:22,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:03:22,690 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:03:22,726 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-min-max-inc.wvr.c[3018,3031] [2023-09-01 03:03:22,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:03:22,743 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:03:22,743 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:03:22,749 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:03:22,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22 WrapperNode [2023-09-01 03:03:22,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:03:22,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:03:22,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:03:22,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:03:22,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,830 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2023-09-01 03:03:22,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:03:22,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:03:22,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:03:22,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:03:22,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:03:22,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:03:22,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:03:22,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:03:22,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (1/1) ... [2023-09-01 03:03:22,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:03:22,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:03:22,915 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) [2023-09-01 03:03:22,941 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 [2023-09-01 03:03:22,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:03:22,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:03:22,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:03:22,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:03:22,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:03:22,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:03:22,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:03:22,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:03:22,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:03:22,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:03:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 03:03:22,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 03:03:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:03:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:03:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:03:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:03:22,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:03:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:03:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:03:22,960 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:03:23,046 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:03:23,047 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:03:23,506 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:03:23,609 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:03:23,609 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 03:03:23,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:03:23 BoogieIcfgContainer [2023-09-01 03:03:23,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:03:23,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:03:23,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:03:23,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:03:23,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:03:22" (1/3) ... [2023-09-01 03:03:23,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480fe1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:03:23, skipping insertion in model container [2023-09-01 03:03:23,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:03:22" (2/3) ... [2023-09-01 03:03:23,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480fe1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:03:23, skipping insertion in model container [2023-09-01 03:03:23,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:03:23" (3/3) ... [2023-09-01 03:03:23,617 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2023-09-01 03:03:23,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:03:23,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-09-01 03:03:23,628 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:03:23,729 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 03:03:23,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 200 transitions, 432 flow [2023-09-01 03:03:23,843 INFO L130 PetriNetUnfolder]: 12/196 cut-off events. [2023-09-01 03:03:23,843 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:03:23,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 196 events. 12/196 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-09-01 03:03:23,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 200 transitions, 432 flow [2023-09-01 03:03:23,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 192 transitions, 408 flow [2023-09-01 03:03:23,862 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:03:23,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 192 transitions, 408 flow [2023-09-01 03:03:23,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 192 transitions, 408 flow [2023-09-01 03:03:23,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 192 transitions, 408 flow [2023-09-01 03:03:23,914 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2023-09-01 03:03:23,915 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:03:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 192 events. 12/192 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-09-01 03:03:23,919 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2023-09-01 03:03:41,981 INFO L134 LiptonReduction]: Checked pairs total: 8115 [2023-09-01 03:03:41,982 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 03:03:41,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:03:42,003 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;@33b3d170, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:03:42,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-09-01 03:03:42,010 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:03:42,010 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:03:42,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:42,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:03:42,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:42,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:42,018 INFO L85 PathProgramCache]: Analyzing trace with hash 26204, now seen corresponding path program 1 times [2023-09-01 03:03:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:42,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712569754] [2023-09-01 03:03:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:42,038 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 [2023-09-01 03:03:42,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:42,040 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) [2023-09-01 03:03:42,050 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 [2023-09-01 03:03:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:03:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:42,432 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:03:42,433 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:03:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:42,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:42,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712569754] [2023-09-01 03:03:42,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712569754] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:42,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:42,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:03:42,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087450461] [2023-09-01 03:03:42,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:42,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:03:42,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:03:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:03:42,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 384 [2023-09-01 03:03:42,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:42,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:42,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 384 [2023-09-01 03:03:42,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:45,098 INFO L130 PetriNetUnfolder]: 18239/23498 cut-off events. [2023-09-01 03:03:45,099 INFO L131 PetriNetUnfolder]: For 408/408 co-relation queries the response was YES. [2023-09-01 03:03:45,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47992 conditions, 23498 events. 18239/23498 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 122413 event pairs, 12836 based on Foata normal form. 0/10355 useless extension candidates. Maximal degree in co-relation 21660. Up to 11727 conditions per place. [2023-09-01 03:03:45,248 INFO L137 encePairwiseOnDemand]: 372/384 looper letters, 104 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-09-01 03:03:45,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 482 flow [2023-09-01 03:03:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:03:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:03:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-09-01 03:03:45,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2023-09-01 03:03:45,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-09-01 03:03:45,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-09-01 03:03:45,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:45,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-09-01 03:03:45,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:45,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:45,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:45,276 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 620 transitions. [2023-09-01 03:03:45,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 482 flow [2023-09-01 03:03:45,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 450 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 03:03:45,318 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 138 flow [2023-09-01 03:03:45,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-09-01 03:03:45,323 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-09-01 03:03:45,323 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 138 flow [2023-09-01 03:03:45,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:45,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:45,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:03:45,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:03:45,532 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 [2023-09-01 03:03:45,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:45,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:45,539 INFO L85 PathProgramCache]: Analyzing trace with hash 26255, now seen corresponding path program 1 times [2023-09-01 03:03:45,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:45,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116090392] [2023-09-01 03:03:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:45,540 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 [2023-09-01 03:03:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:45,558 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) [2023-09-01 03:03:45,569 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 [2023-09-01 03:03:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:45,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:03:45,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:45,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:45,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:45,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116090392] [2023-09-01 03:03:45,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116090392] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:45,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:45,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:03:45,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081281438] [2023-09-01 03:03:45,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:45,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:03:45,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:03:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:03:45,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 384 [2023-09-01 03:03:45,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:45,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:45,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 384 [2023-09-01 03:03:45,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:46,756 INFO L130 PetriNetUnfolder]: 9120/11752 cut-off events. [2023-09-01 03:03:46,757 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:03:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 11752 events. 9120/11752 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56085 event pairs, 6418 based on Foata normal form. 0/5172 useless extension candidates. Maximal degree in co-relation 23699. Up to 11727 conditions per place. [2023-09-01 03:03:46,818 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 54 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-09-01 03:03:46,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 252 flow [2023-09-01 03:03:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:03:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:03:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-09-01 03:03:46,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835069444444444 [2023-09-01 03:03:46,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-09-01 03:03:46,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-09-01 03:03:46,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:46,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-09-01 03:03:46,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:46,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:46,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:46,826 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 557 transitions. [2023-09-01 03:03:46,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 252 flow [2023-09-01 03:03:46,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:46,829 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 148 flow [2023-09-01 03:03:46,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-09-01 03:03:46,830 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-09-01 03:03:46,830 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 148 flow [2023-09-01 03:03:46,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:46,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:46,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:03:46,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 03:03:47,039 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 [2023-09-01 03:03:47,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:47,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 26202, now seen corresponding path program 1 times [2023-09-01 03:03:47,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:47,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936240749] [2023-09-01 03:03:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:47,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:03:47,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:47,046 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) [2023-09-01 03:03:47,048 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 (4)] Waiting until timeout for monitored process [2023-09-01 03:03:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:03:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:47,228 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:03:47,229 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 03:03:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:47,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:47,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936240749] [2023-09-01 03:03:47,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936240749] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:47,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:47,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:03:47,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047597367] [2023-09-01 03:03:47,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:47,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:03:47,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:03:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:03:47,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:03:47,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:47,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:47,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:03:47,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:48,325 INFO L130 PetriNetUnfolder]: 9120/11750 cut-off events. [2023-09-01 03:03:48,326 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:03:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23714 conditions, 11750 events. 9120/11750 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56221 event pairs, 6418 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 23700. Up to 11726 conditions per place. [2023-09-01 03:03:48,428 INFO L137 encePairwiseOnDemand]: 382/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 03:03:48,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 254 flow [2023-09-01 03:03:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:03:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:03:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-09-01 03:03:48,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-09-01 03:03:48,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-09-01 03:03:48,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-09-01 03:03:48,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:48,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-09-01 03:03:48,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:48,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:48,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:48,437 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 148 flow. Second operand 3 states and 540 transitions. [2023-09-01 03:03:48,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 254 flow [2023-09-01 03:03:48,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 248 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:03:48,444 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 142 flow [2023-09-01 03:03:48,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-09-01 03:03:48,446 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -13 predicate places. [2023-09-01 03:03:48,446 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 142 flow [2023-09-01 03:03:48,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:48,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:48,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:03:48,463 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 [2023-09-01 03:03:48,658 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 [2023-09-01 03:03:48,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:48,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash 814740, now seen corresponding path program 1 times [2023-09-01 03:03:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:48,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029346877] [2023-09-01 03:03:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:48,660 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 [2023-09-01 03:03:48,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:48,661 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) [2023-09-01 03:03:48,702 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 [2023-09-01 03:03:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:03:48,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:48,900 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-09-01 03:03:48,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-09-01 03:03:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:03:49,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:49,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:49,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029346877] [2023-09-01 03:03:49,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029346877] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:49,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:49,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:03:49,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044044940] [2023-09-01 03:03:49,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:49,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:03:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:03:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:03:49,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:03:49,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:49,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:49,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:03:49,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:50,177 INFO L130 PetriNetUnfolder]: 7644/9913 cut-off events. [2023-09-01 03:03:50,178 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:03:50,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20037 conditions, 9913 events. 7644/9913 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 46761 event pairs, 5350 based on Foata normal form. 0/4487 useless extension candidates. Maximal degree in co-relation 20028. Up to 9889 conditions per place. [2023-09-01 03:03:50,222 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 51 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-09-01 03:03:50,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 240 flow [2023-09-01 03:03:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:03:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:03:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-09-01 03:03:50,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678819444444444 [2023-09-01 03:03:50,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-09-01 03:03:50,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-09-01 03:03:50,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:50,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-09-01 03:03:50,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:50,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:50,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:50,230 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 142 flow. Second operand 3 states and 539 transitions. [2023-09-01 03:03:50,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 240 flow [2023-09-01 03:03:50,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:50,233 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 137 flow [2023-09-01 03:03:50,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-09-01 03:03:50,235 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-09-01 03:03:50,235 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 137 flow [2023-09-01 03:03:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:50,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:03:50,255 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 [2023-09-01 03:03:50,446 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 [2023-09-01 03:03:50,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:50,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash 814739, now seen corresponding path program 1 times [2023-09-01 03:03:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:50,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557162126] [2023-09-01 03:03:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:50,449 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 [2023-09-01 03:03:50,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:50,450 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) [2023-09-01 03:03:50,505 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 [2023-09-01 03:03:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:03:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:50,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:50,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:50,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:50,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:50,768 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-09-01 03:03:50,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-09-01 03:03:50,822 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-09-01 03:03:50,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 88 [2023-09-01 03:03:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:03:50,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:50,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557162126] [2023-09-01 03:03:50,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557162126] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:50,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:03:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87953718] [2023-09-01 03:03:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:03:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:03:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:03:51,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 384 [2023-09-01 03:03:51,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:51,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 384 [2023-09-01 03:03:51,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:51,760 INFO L130 PetriNetUnfolder]: 6168/8076 cut-off events. [2023-09-01 03:03:51,760 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:03:51,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16363 conditions, 8076 events. 6168/8076 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 37791 event pairs, 4282 based on Foata normal form. 0/3803 useless extension candidates. Maximal degree in co-relation 16353. Up to 8052 conditions per place. [2023-09-01 03:03:51,784 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 49 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 03:03:51,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 231 flow [2023-09-01 03:03:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:03:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:03:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-09-01 03:03:51,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2023-09-01 03:03:51,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-09-01 03:03:51,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-09-01 03:03:51,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:51,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-09-01 03:03:51,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,790 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 137 flow. Second operand 3 states and 543 transitions. [2023-09-01 03:03:51,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 231 flow [2023-09-01 03:03:51,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:51,792 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 132 flow [2023-09-01 03:03:51,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-09-01 03:03:51,792 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -15 predicate places. [2023-09-01 03:03:51,793 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 132 flow [2023-09-01 03:03:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:51,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:51,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:03:51,813 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 [2023-09-01 03:03:52,009 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 [2023-09-01 03:03:52,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:52,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash 814689, now seen corresponding path program 1 times [2023-09-01 03:03:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280865358] [2023-09-01 03:03:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:52,011 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 [2023-09-01 03:03:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:52,012 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) [2023-09-01 03:03:52,018 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 [2023-09-01 03:03:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:52,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:03:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:52,226 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:03:52,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:03:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:52,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:52,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280865358] [2023-09-01 03:03:52,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280865358] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:52,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:52,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:03:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518009601] [2023-09-01 03:03:52,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:52,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:03:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:03:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:03:53,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-09-01 03:03:53,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:53,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:53,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-09-01 03:03:53,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:54,830 INFO L130 PetriNetUnfolder]: 12337/16153 cut-off events. [2023-09-01 03:03:54,830 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-09-01 03:03:54,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32723 conditions, 16153 events. 12337/16153 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 82373 event pairs, 8564 based on Foata normal form. 0/7626 useless extension candidates. Maximal degree in co-relation 32712. Up to 8051 conditions per place. [2023-09-01 03:03:54,902 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 94 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2023-09-01 03:03:54,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 456 flow [2023-09-01 03:03:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:03:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:03:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1046 transitions. [2023-09-01 03:03:54,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539930555555556 [2023-09-01 03:03:54,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1046 transitions. [2023-09-01 03:03:54,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1046 transitions. [2023-09-01 03:03:54,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:54,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1046 transitions. [2023-09-01 03:03:54,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.33333333333334) internal successors, (1046), 6 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:54,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:54,920 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:54,920 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 132 flow. Second operand 6 states and 1046 transitions. [2023-09-01 03:03:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 456 flow [2023-09-01 03:03:54,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:54,922 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 189 flow [2023-09-01 03:03:54,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=6, PETRI_FLOW=189, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-09-01 03:03:54,925 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-09-01 03:03:54,925 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 189 flow [2023-09-01 03:03:54,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:54,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:54,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:03:54,932 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 [2023-09-01 03:03:55,132 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 [2023-09-01 03:03:55,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:55,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:55,133 INFO L85 PathProgramCache]: Analyzing trace with hash 782982615, now seen corresponding path program 1 times [2023-09-01 03:03:55,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:55,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978686998] [2023-09-01 03:03:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:55,134 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 [2023-09-01 03:03:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:55,135 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) [2023-09-01 03:03:55,137 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 [2023-09-01 03:03:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:03:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:55,335 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-09-01 03:03:55,335 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 7 case distinctions, treesize of input 49 treesize of output 62 [2023-09-01 03:03:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:03:55,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:03:55,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978686998] [2023-09-01 03:03:55,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978686998] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:03:55,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:03:55,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:03:55,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444815859] [2023-09-01 03:03:55,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:03:55,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:03:55,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:55,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:03:55,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:03:55,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:03:55,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:55,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:55,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:03:55,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:57,320 INFO L130 PetriNetUnfolder]: 11953/15637 cut-off events. [2023-09-01 03:03:57,320 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-09-01 03:03:57,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31715 conditions, 15637 events. 11953/15637 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 79777 event pairs, 8298 based on Foata normal form. 0/7435 useless extension candidates. Maximal degree in co-relation 31699. Up to 15589 conditions per place. [2023-09-01 03:03:57,438 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-09-01 03:03:57,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 291 flow [2023-09-01 03:03:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:03:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:03:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-09-01 03:03:57,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644097222222222 [2023-09-01 03:03:57,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-09-01 03:03:57,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-09-01 03:03:57,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:57,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-09-01 03:03:57,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:57,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:57,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:57,444 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 189 flow. Second operand 3 states and 535 transitions. [2023-09-01 03:03:57,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 291 flow [2023-09-01 03:03:57,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 58 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:03:57,446 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 173 flow [2023-09-01 03:03:57,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-09-01 03:03:57,447 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2023-09-01 03:03:57,447 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 173 flow [2023-09-01 03:03:57,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:57,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:03:57,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:03:57,467 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 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:03:57,655 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 [2023-09-01 03:03:57,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:03:57,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:03:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash 782982613, now seen corresponding path program 1 times [2023-09-01 03:03:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:03:57,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720219582] [2023-09-01 03:03:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:03:57,657 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 [2023-09-01 03:03:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:03:57,659 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) [2023-09-01 03:03:57,668 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 [2023-09-01 03:03:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:03:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:03:57,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:03:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:57,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:03:57,874 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-09-01 03:03:57,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-09-01 03:03:57,894 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:03:57,894 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 31 treesize of output 27 [2023-09-01 03:03:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:58,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:03:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:03:58,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:03:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720219582] [2023-09-01 03:03:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720219582] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:03:58,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:03:58,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:03:58,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363703946] [2023-09-01 03:03:58,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:03:58,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:03:58,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:03:58,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:03:58,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:03:59,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:03:59,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:03:59,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:03:59,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:03:59,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:01,206 INFO L130 PetriNetUnfolder]: 11569/15121 cut-off events. [2023-09-01 03:04:01,207 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 03:04:01,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30678 conditions, 15121 events. 11569/15121 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 76800 event pairs, 8032 based on Foata normal form. 0/7279 useless extension candidates. Maximal degree in co-relation 30661. Up to 7539 conditions per place. [2023-09-01 03:04:01,271 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 90 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-09-01 03:04:01,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 453 flow [2023-09-01 03:04:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:04:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:04:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 858 transitions. [2023-09-01 03:04:01,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2023-09-01 03:04:01,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 858 transitions. [2023-09-01 03:04:01,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 858 transitions. [2023-09-01 03:04:01,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:01,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 858 transitions. [2023-09-01 03:04:01,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:01,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:01,278 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:01,278 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 173 flow. Second operand 5 states and 858 transitions. [2023-09-01 03:04:01,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 453 flow [2023-09-01 03:04:01,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:04:01,285 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 174 flow [2023-09-01 03:04:01,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-09-01 03:04:01,286 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-09-01 03:04:01,286 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 174 flow [2023-09-01 03:04:01,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:01,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:01,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:04:01,298 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 [2023-09-01 03:04:01,495 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 [2023-09-01 03:04:01,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:01,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash 782982390, now seen corresponding path program 1 times [2023-09-01 03:04:01,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:01,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737364380] [2023-09-01 03:04:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:01,498 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 [2023-09-01 03:04:01,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:01,498 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) [2023-09-01 03:04:01,501 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 [2023-09-01 03:04:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:01,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:04:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:01,665 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:04:01,666 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 03:04:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:04:01,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:04:01,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:01,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737364380] [2023-09-01 03:04:01,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737364380] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:04:01,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:04:01,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:04:01,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751053676] [2023-09-01 03:04:01,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:04:01,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:04:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:04:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:04:01,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 384 [2023-09-01 03:04:01,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:01,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:01,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 384 [2023-09-01 03:04:01,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:02,516 INFO L130 PetriNetUnfolder]: 6411/8489 cut-off events. [2023-09-01 03:04:02,517 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-09-01 03:04:02,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 8489 events. 6411/8489 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 40190 event pairs, 4360 based on Foata normal form. 0/4745 useless extension candidates. Maximal degree in co-relation 17227. Up to 8446 conditions per place. [2023-09-01 03:04:02,554 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-09-01 03:04:02,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 51 transitions, 260 flow [2023-09-01 03:04:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:04:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:04:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 667 transitions. [2023-09-01 03:04:02,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342447916666667 [2023-09-01 03:04:02,556 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 667 transitions. [2023-09-01 03:04:02,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 667 transitions. [2023-09-01 03:04:02,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:02,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 667 transitions. [2023-09-01 03:04:02,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:02,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:02,560 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:02,560 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 174 flow. Second operand 4 states and 667 transitions. [2023-09-01 03:04:02,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 51 transitions, 260 flow [2023-09-01 03:04:02,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:04:02,562 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 167 flow [2023-09-01 03:04:02,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-09-01 03:04:02,563 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-09-01 03:04:02,563 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 167 flow [2023-09-01 03:04:02,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:02,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:02,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:04:02,575 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 [2023-09-01 03:04:02,773 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 [2023-09-01 03:04:02,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:02,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash 782982391, now seen corresponding path program 1 times [2023-09-01 03:04:02,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:02,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990196173] [2023-09-01 03:04:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:02,774 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 [2023-09-01 03:04:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:02,775 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) [2023-09-01 03:04:02,778 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 [2023-09-01 03:04:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:02,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:04:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:02,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:04:02,985 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 25 treesize of output 21 [2023-09-01 03:04:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:03,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990196173] [2023-09-01 03:04:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990196173] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:04:03,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:04:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:04:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953059448] [2023-09-01 03:04:03,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:04:03,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:04:03,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:04:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:04:03,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 384 [2023-09-01 03:04:03,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:03,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:03,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 384 [2023-09-01 03:04:03,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:04,469 INFO L130 PetriNetUnfolder]: 6411/8483 cut-off events. [2023-09-01 03:04:04,470 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 03:04:04,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17242 conditions, 8483 events. 6411/8483 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39916 event pairs, 4360 based on Foata normal form. 0/4749 useless extension candidates. Maximal degree in co-relation 17224. Up to 4224 conditions per place. [2023-09-01 03:04:04,505 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 80 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2023-09-01 03:04:04,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 431 flow [2023-09-01 03:04:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:04:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:04:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1179 transitions. [2023-09-01 03:04:04,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43861607142857145 [2023-09-01 03:04:04,509 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1179 transitions. [2023-09-01 03:04:04,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1179 transitions. [2023-09-01 03:04:04,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:04,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1179 transitions. [2023-09-01 03:04:04,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.42857142857142) internal successors, (1179), 7 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:04,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:04,514 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:04,514 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 167 flow. Second operand 7 states and 1179 transitions. [2023-09-01 03:04:04,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 431 flow [2023-09-01 03:04:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:04:04,517 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 181 flow [2023-09-01 03:04:04,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-09-01 03:04:04,518 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2023-09-01 03:04:04,518 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 181 flow [2023-09-01 03:04:04,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:04,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:04,518 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:04:04,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:04:04,727 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 [2023-09-01 03:04:04,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:04,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:04,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1497055332, now seen corresponding path program 2 times [2023-09-01 03:04:04,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:04,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102362259] [2023-09-01 03:04:04,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:04:04,729 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 [2023-09-01 03:04:04,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:04,730 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) [2023-09-01 03:04:04,732 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 [2023-09-01 03:04:04,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:04:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:04:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:04:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:04,945 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:04:04,945 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:04:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:05,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:04:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:05,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:05,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102362259] [2023-09-01 03:04:05,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102362259] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:04:05,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:04:05,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:04:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551310507] [2023-09-01 03:04:05,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:04:05,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:04:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:04:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:04:08,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 384 [2023-09-01 03:04:08,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 181 flow. Second operand has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:08,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:08,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 384 [2023-09-01 03:04:08,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:14,920 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2023-09-01 03:04:14,920 INFO L131 PetriNetUnfolder]: For 221/221 co-relation queries the response was YES. [2023-09-01 03:04:15,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77424 conditions, 38147 events. 28838/38147 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 212443 event pairs, 19620 based on Foata normal form. 6/21385 useless extension candidates. Maximal degree in co-relation 77406. Up to 4224 conditions per place. [2023-09-01 03:04:15,180 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 353 selfloop transitions, 12 changer transitions 0/366 dead transitions. [2023-09-01 03:04:15,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 366 transitions, 1673 flow [2023-09-01 03:04:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:04:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:04:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2267 transitions. [2023-09-01 03:04:15,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919704861111111 [2023-09-01 03:04:15,186 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2267 transitions. [2023-09-01 03:04:15,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2267 transitions. [2023-09-01 03:04:15,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:15,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2267 transitions. [2023-09-01 03:04:15,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.91666666666666) internal successors, (2267), 12 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:15,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:15,196 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:15,196 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 181 flow. Second operand 12 states and 2267 transitions. [2023-09-01 03:04:15,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 366 transitions, 1673 flow [2023-09-01 03:04:15,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 366 transitions, 1656 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-09-01 03:04:15,200 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 265 flow [2023-09-01 03:04:15,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=265, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-09-01 03:04:15,200 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-09-01 03:04:15,201 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 265 flow [2023-09-01 03:04:15,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:15,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:15,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:15,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-09-01 03:04:15,409 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 [2023-09-01 03:04:15,409 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:15,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:15,409 INFO L85 PathProgramCache]: Analyzing trace with hash 827034521, now seen corresponding path program 1 times [2023-09-01 03:04:15,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:15,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89179368] [2023-09-01 03:04:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:15,410 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 [2023-09-01 03:04:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:15,411 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) [2023-09-01 03:04:15,416 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 [2023-09-01 03:04:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:15,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:04:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:15,619 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-09-01 03:04:15,620 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 5 case distinctions, treesize of input 36 treesize of output 51 [2023-09-01 03:04:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:04:15,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:04:15,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:15,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89179368] [2023-09-01 03:04:15,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89179368] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:04:15,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:04:15,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:04:15,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185022959] [2023-09-01 03:04:15,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:04:15,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:04:15,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:04:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:04:15,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-09-01 03:04:15,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:15,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:15,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-09-01 03:04:15,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:18,354 INFO L130 PetriNetUnfolder]: 28244/37256 cut-off events. [2023-09-01 03:04:18,354 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-09-01 03:04:18,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75672 conditions, 37256 events. 28244/37256 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 209014 event pairs, 19170 based on Foata normal form. 0/20957 useless extension candidates. Maximal degree in co-relation 75648. Up to 37121 conditions per place. [2023-09-01 03:04:18,713 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 03:04:18,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 55 transitions, 369 flow [2023-09-01 03:04:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:04:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:04:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-09-01 03:04:18,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-09-01 03:04:18,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-09-01 03:04:18,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-09-01 03:04:18,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:18,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-09-01 03:04:18,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:18,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:18,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:18,719 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 265 flow. Second operand 3 states and 528 transitions. [2023-09-01 03:04:18,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 55 transitions, 369 flow [2023-09-01 03:04:18,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 55 transitions, 344 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:04:18,722 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 238 flow [2023-09-01 03:04:18,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2023-09-01 03:04:18,723 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-09-01 03:04:18,723 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 238 flow [2023-09-01 03:04:18,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:18,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:18,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:18,735 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 [2023-09-01 03:04:18,932 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 [2023-09-01 03:04:18,933 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:18,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash 827034520, now seen corresponding path program 1 times [2023-09-01 03:04:18,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:18,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380943132] [2023-09-01 03:04:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:18,934 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 [2023-09-01 03:04:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:18,937 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) [2023-09-01 03:04:18,939 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 [2023-09-01 03:04:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:19,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:04:19,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:19,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:04:19,185 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2023-09-01 03:04:19,186 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 4 case distinctions, treesize of input 20 treesize of output 59 [2023-09-01 03:04:19,197 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 60 treesize of output 58 [2023-09-01 03:04:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:19,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:04:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:19,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:19,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380943132] [2023-09-01 03:04:19,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380943132] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:04:19,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:04:19,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:04:19,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426739085] [2023-09-01 03:04:19,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:04:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:04:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:04:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:04:20,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:04:20,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:20,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:20,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:04:20,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:22,957 INFO L130 PetriNetUnfolder]: 27650/36365 cut-off events. [2023-09-01 03:04:22,958 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-09-01 03:04:23,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73873 conditions, 36365 events. 27650/36365 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 203063 event pairs, 18720 based on Foata normal form. 0/20695 useless extension candidates. Maximal degree in co-relation 73848. Up to 32204 conditions per place. [2023-09-01 03:04:23,190 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 83 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-09-01 03:04:23,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 482 flow [2023-09-01 03:04:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:04:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:04:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-09-01 03:04:23,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2023-09-01 03:04:23,195 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-09-01 03:04:23,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-09-01 03:04:23,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:23,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-09-01 03:04:23,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:23,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:23,206 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:23,206 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 238 flow. Second operand 5 states and 844 transitions. [2023-09-01 03:04:23,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 482 flow [2023-09-01 03:04:23,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:04:23,208 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 239 flow [2023-09-01 03:04:23,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-09-01 03:04:23,209 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-09-01 03:04:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 239 flow [2023-09-01 03:04:23,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:23,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:23,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:23,231 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 [2023-09-01 03:04:23,431 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 [2023-09-01 03:04:23,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:23,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:23,432 INFO L85 PathProgramCache]: Analyzing trace with hash 826824309, now seen corresponding path program 1 times [2023-09-01 03:04:23,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:23,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755859392] [2023-09-01 03:04:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:23,432 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 [2023-09-01 03:04:23,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:23,434 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) [2023-09-01 03:04:23,435 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 [2023-09-01 03:04:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:04:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:04:23,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:04:23,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:23,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755859392] [2023-09-01 03:04:23,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755859392] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:04:23,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:04:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:04:23,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220303945] [2023-09-01 03:04:23,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:04:23,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:04:23,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:23,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:04:23,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:04:23,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-09-01 03:04:23,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:23,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:23,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-09-01 03:04:23,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:28,865 INFO L130 PetriNetUnfolder]: 41933/54851 cut-off events. [2023-09-01 03:04:28,865 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-09-01 03:04:29,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111460 conditions, 54851 events. 41933/54851 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 329691 event pairs, 6201 based on Foata normal form. 0/30902 useless extension candidates. Maximal degree in co-relation 111434. Up to 37404 conditions per place. [2023-09-01 03:04:29,364 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 91 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-09-01 03:04:29,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 533 flow [2023-09-01 03:04:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:04:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:04:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 884 transitions. [2023-09-01 03:04:29,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46041666666666664 [2023-09-01 03:04:29,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 884 transitions. [2023-09-01 03:04:29,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 884 transitions. [2023-09-01 03:04:29,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:29,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 884 transitions. [2023-09-01 03:04:29,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:29,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:29,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:29,371 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 239 flow. Second operand 5 states and 884 transitions. [2023-09-01 03:04:29,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 533 flow [2023-09-01 03:04:29,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:04:29,373 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 270 flow [2023-09-01 03:04:29,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-09-01 03:04:29,374 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-09-01 03:04:29,374 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 270 flow [2023-09-01 03:04:29,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:29,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:29,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:29,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:04:29,585 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 [2023-09-01 03:04:29,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:29,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash -138246400, now seen corresponding path program 1 times [2023-09-01 03:04:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:29,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33006242] [2023-09-01 03:04:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:29,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:04:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:29,602 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) [2023-09-01 03:04:29,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:04:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:04:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:29,848 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:04:29,848 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:04:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:04:29,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:04:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:04:30,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:30,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33006242] [2023-09-01 03:04:30,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33006242] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:04:30,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:04:30,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:04:30,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759957895] [2023-09-01 03:04:30,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:04:30,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:04:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:04:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:04:32,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:04:32,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 270 flow. Second operand has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:32,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:32,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:04:32,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:41,539 INFO L130 PetriNetUnfolder]: 60131/77693 cut-off events. [2023-09-01 03:04:41,540 INFO L131 PetriNetUnfolder]: For 18379/18379 co-relation queries the response was YES. [2023-09-01 03:04:42,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183776 conditions, 77693 events. 60131/77693 cut-off events. For 18379/18379 co-relation queries the response was YES. Maximal size of possible extension queue 2990. Compared 465090 event pairs, 11511 based on Foata normal form. 1548/59414 useless extension candidates. Maximal degree in co-relation 183748. Up to 26965 conditions per place. [2023-09-01 03:04:42,326 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-09-01 03:04:42,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 772 flow [2023-09-01 03:04:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:04:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:04:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1355 transitions. [2023-09-01 03:04:42,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410807291666667 [2023-09-01 03:04:42,330 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1355 transitions. [2023-09-01 03:04:42,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1355 transitions. [2023-09-01 03:04:42,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:42,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1355 transitions. [2023-09-01 03:04:42,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.375) internal successors, (1355), 8 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:42,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:42,336 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:42,336 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 270 flow. Second operand 8 states and 1355 transitions. [2023-09-01 03:04:42,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 772 flow [2023-09-01 03:04:42,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 764 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:04:42,350 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 337 flow [2023-09-01 03:04:42,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-09-01 03:04:42,351 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-09-01 03:04:42,351 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 337 flow [2023-09-01 03:04:42,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:42,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:42,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:42,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:04:42,561 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 [2023-09-01 03:04:42,562 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:42,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash 211056040, now seen corresponding path program 1 times [2023-09-01 03:04:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:42,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095012349] [2023-09-01 03:04:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:42,563 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 [2023-09-01 03:04:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:42,564 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) [2023-09-01 03:04:42,566 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 [2023-09-01 03:04:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:42,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:04:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:04:42,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:04:42,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095012349] [2023-09-01 03:04:42,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095012349] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:04:42,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:04:42,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:04:42,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569160194] [2023-09-01 03:04:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:04:42,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:04:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:04:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:04:42,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-09-01 03:04:42,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:42,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:42,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-09-01 03:04:42,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:54,724 INFO L130 PetriNetUnfolder]: 85223/109949 cut-off events. [2023-09-01 03:04:54,725 INFO L131 PetriNetUnfolder]: For 109206/109260 co-relation queries the response was YES. [2023-09-01 03:04:55,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305247 conditions, 109949 events. 85223/109949 cut-off events. For 109206/109260 co-relation queries the response was YES. Maximal size of possible extension queue 4092. Compared 657474 event pairs, 22545 based on Foata normal form. 18/83309 useless extension candidates. Maximal degree in co-relation 305213. Up to 77868 conditions per place. [2023-09-01 03:04:56,009 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-09-01 03:04:56,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 710 flow [2023-09-01 03:04:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:04:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:04:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2023-09-01 03:04:56,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2023-09-01 03:04:56,012 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2023-09-01 03:04:56,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2023-09-01 03:04:56,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:04:56,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2023-09-01 03:04:56,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:56,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:56,015 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:56,015 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 337 flow. Second operand 5 states and 882 transitions. [2023-09-01 03:04:56,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 710 flow [2023-09-01 03:04:56,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 683 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 03:04:56,254 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 340 flow [2023-09-01 03:04:56,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=340, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2023-09-01 03:04:56,255 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-09-01 03:04:56,255 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 340 flow [2023-09-01 03:04:56,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:56,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:56,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:56,263 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 [2023-09-01 03:04:56,460 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 [2023-09-01 03:04:56,461 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:04:56,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash 211245344, now seen corresponding path program 1 times [2023-09-01 03:04:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:04:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705995051] [2023-09-01 03:04:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:56,462 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 [2023-09-01 03:04:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:04:56,465 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) [2023-09-01 03:04:56,467 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 [2023-09-01 03:04:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:04:56,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:56,892 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:04:56,892 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:04:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:57,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:04:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:57,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:04:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705995051] [2023-09-01 03:04:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705995051] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:04:57,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:04:57,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:04:57,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051467195] [2023-09-01 03:04:57,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:04:57,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:04:57,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:04:57,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:04:57,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:04:58,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:04:58,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:04:58,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:58,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:04:58,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:08,909 INFO L130 PetriNetUnfolder]: 75431/97547 cut-off events. [2023-09-01 03:05:08,909 INFO L131 PetriNetUnfolder]: For 102564/102564 co-relation queries the response was YES. [2023-09-01 03:05:09,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276511 conditions, 97547 events. 75431/97547 cut-off events. For 102564/102564 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 575079 event pairs, 49806 based on Foata normal form. 0/81815 useless extension candidates. Maximal degree in co-relation 276476. Up to 86644 conditions per place. [2023-09-01 03:05:10,167 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 99 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-09-01 03:05:10,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 704 flow [2023-09-01 03:05:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:05:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:05:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 840 transitions. [2023-09-01 03:05:10,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-09-01 03:05:10,170 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 840 transitions. [2023-09-01 03:05:10,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 840 transitions. [2023-09-01 03:05:10,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:10,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 840 transitions. [2023-09-01 03:05:10,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:10,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:10,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:10,174 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 340 flow. Second operand 5 states and 840 transitions. [2023-09-01 03:05:10,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 704 flow [2023-09-01 03:05:10,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 103 transitions, 686 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:05:10,351 INFO L231 Difference]: Finished difference. Result has 92 places, 61 transitions, 332 flow [2023-09-01 03:05:10,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2023-09-01 03:05:10,351 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-09-01 03:05:10,352 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 332 flow [2023-09-01 03:05:10,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:10,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:10,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:10,362 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 [2023-09-01 03:05:10,561 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 [2023-09-01 03:05:10,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:05:10,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash 211245343, now seen corresponding path program 1 times [2023-09-01 03:05:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:10,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632703351] [2023-09-01 03:05:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:10,563 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 [2023-09-01 03:05:10,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:10,566 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) [2023-09-01 03:05:10,568 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 [2023-09-01 03:05:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:10,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:05:10,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:10,770 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-09-01 03:05:10,770 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 4 case distinctions, treesize of input 18 treesize of output 36 [2023-09-01 03:05:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:05:10,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:05:10,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:10,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632703351] [2023-09-01 03:05:10,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632703351] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:05:10,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:05:10,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:05:10,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220642473] [2023-09-01 03:05:10,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:05:10,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:05:10,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:10,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:05:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:05:10,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 384 [2023-09-01 03:05:10,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:10,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:10,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 384 [2023-09-01 03:05:10,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:19,862 INFO L130 PetriNetUnfolder]: 65873/85379 cut-off events. [2023-09-01 03:05:19,862 INFO L131 PetriNetUnfolder]: For 84618/84618 co-relation queries the response was YES. [2023-09-01 03:05:20,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238848 conditions, 85379 events. 65873/85379 cut-off events. For 84618/84618 co-relation queries the response was YES. Maximal size of possible extension queue 3101. Compared 497942 event pairs, 43587 based on Foata normal form. 0/73742 useless extension candidates. Maximal degree in co-relation 238813. Up to 85271 conditions per place. [2023-09-01 03:05:20,979 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 03:05:20,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 444 flow [2023-09-01 03:05:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:05:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:05:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-09-01 03:05:20,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2023-09-01 03:05:20,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-09-01 03:05:20,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-09-01 03:05:20,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:20,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-09-01 03:05:20,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:20,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:20,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:20,983 INFO L175 Difference]: Start difference. First operand has 92 places, 61 transitions, 332 flow. Second operand 3 states and 513 transitions. [2023-09-01 03:05:20,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 444 flow [2023-09-01 03:05:21,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:05:21,123 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 325 flow [2023-09-01 03:05:21,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2023-09-01 03:05:21,124 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2023-09-01 03:05:21,124 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 325 flow [2023-09-01 03:05:21,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:21,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:21,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:21,144 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 [2023-09-01 03:05:21,333 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 [2023-09-01 03:05:21,334 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:05:21,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2047193718, now seen corresponding path program 1 times [2023-09-01 03:05:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:21,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171153562] [2023-09-01 03:05:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:21,334 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 [2023-09-01 03:05:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:21,336 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) [2023-09-01 03:05:21,338 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 [2023-09-01 03:05:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:05:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:21,570 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:05:21,570 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:05:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:05:21,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:05:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:05:22,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171153562] [2023-09-01 03:05:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171153562] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:05:22,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:05:22,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:05:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40368889] [2023-09-01 03:05:22,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:05:22,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:05:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:05:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:05:24,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:05:24,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:24,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:24,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:05:24,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:05:39,490 INFO L130 PetriNetUnfolder]: 98849/126239 cut-off events. [2023-09-01 03:05:39,491 INFO L131 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2023-09-01 03:05:40,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351689 conditions, 126239 events. 98849/126239 cut-off events. For 124047/124047 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 762910 event pairs, 23391 based on Foata normal form. 2628/113738 useless extension candidates. Maximal degree in co-relation 351654. Up to 47638 conditions per place. [2023-09-01 03:05:40,952 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 145 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2023-09-01 03:05:40,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1054 flow [2023-09-01 03:05:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:05:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:05:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-09-01 03:05:40,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358723958333333 [2023-09-01 03:05:40,956 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-09-01 03:05:40,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-09-01 03:05:40,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:40,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-09-01 03:05:40,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:40,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:40,961 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:40,961 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 325 flow. Second operand 8 states and 1339 transitions. [2023-09-01 03:05:40,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1054 flow [2023-09-01 03:05:41,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 159 transitions, 1051 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:05:41,111 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 397 flow [2023-09-01 03:05:41,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=100, PETRI_TRANSITIONS=64} [2023-09-01 03:05:41,112 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 23 predicate places. [2023-09-01 03:05:41,112 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 397 flow [2023-09-01 03:05:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:05:41,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:05:41,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:05:41,323 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 [2023-09-01 03:05:41,323 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:05:41,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:05:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2041334241, now seen corresponding path program 1 times [2023-09-01 03:05:41,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:05:41,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048322492] [2023-09-01 03:05:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:05:41,324 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 [2023-09-01 03:05:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:05:41,325 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) [2023-09-01 03:05:41,327 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 [2023-09-01 03:05:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:05:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:05:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:05:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:05:41,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:05:41,619 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 25 treesize of output 21 [2023-09-01 03:05:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:05:41,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:05:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048322492] [2023-09-01 03:05:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048322492] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:05:41,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:05:41,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:05:41,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317203763] [2023-09-01 03:05:41,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:05:41,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:05:41,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:05:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:05:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:05:43,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:05:43,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 64 transitions, 397 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:43,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:05:43,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:05:43,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:06:02,757 INFO L130 PetriNetUnfolder]: 127811/167828 cut-off events. [2023-09-01 03:06:02,757 INFO L131 PetriNetUnfolder]: For 340489/340489 co-relation queries the response was YES. [2023-09-01 03:06:04,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563520 conditions, 167828 events. 127811/167828 cut-off events. For 340489/340489 co-relation queries the response was YES. Maximal size of possible extension queue 3515. Compared 999134 event pairs, 63045 based on Foata normal form. 0/161564 useless extension candidates. Maximal degree in co-relation 563479. Up to 101297 conditions per place. [2023-09-01 03:06:05,051 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 172 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2023-09-01 03:06:05,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1357 flow [2023-09-01 03:06:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:06:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:06:05,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1496 transitions. [2023-09-01 03:06:05,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2023-09-01 03:06:05,055 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1496 transitions. [2023-09-01 03:06:05,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1496 transitions. [2023-09-01 03:06:05,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:06:05,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1496 transitions. [2023-09-01 03:06:05,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.22222222222223) internal successors, (1496), 9 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:05,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:05,089 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:05,089 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 397 flow. Second operand 9 states and 1496 transitions. [2023-09-01 03:06:05,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1357 flow [2023-09-01 03:06:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1310 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-09-01 03:06:05,705 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 436 flow [2023-09-01 03:06:05,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=107, PETRI_TRANSITIONS=68} [2023-09-01 03:06:05,706 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2023-09-01 03:06:05,706 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 436 flow [2023-09-01 03:06:05,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:05,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:06:05,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:06:05,716 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 [2023-09-01 03:06:05,913 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 [2023-09-01 03:06:05,914 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:06:05,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:06:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1143151987, now seen corresponding path program 1 times [2023-09-01 03:06:05,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:06:05,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316461930] [2023-09-01 03:06:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:06:05,915 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 [2023-09-01 03:06:05,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:06:05,916 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) [2023-09-01 03:06:05,918 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 [2023-09-01 03:06:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:06:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:06:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:06:06,174 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:06:06,174 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:06:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:06:06,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:06:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:06:06,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:06:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316461930] [2023-09-01 03:06:06,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316461930] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:06:06,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:06:06,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:06:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143820519] [2023-09-01 03:06:06,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:06:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:06:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:06:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:06:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:06:08,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-09-01 03:06:08,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 68 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:08,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:06:08,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-09-01 03:06:08,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:06:41,714 INFO L130 PetriNetUnfolder]: 201899/260708 cut-off events. [2023-09-01 03:06:41,736 INFO L131 PetriNetUnfolder]: For 534737/534737 co-relation queries the response was YES. [2023-09-01 03:06:44,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922814 conditions, 260708 events. 201899/260708 cut-off events. For 534737/534737 co-relation queries the response was YES. Maximal size of possible extension queue 4866. Compared 1532061 event pairs, 46503 based on Foata normal form. 25056/285764 useless extension candidates. Maximal degree in co-relation 922771. Up to 86887 conditions per place. [2023-09-01 03:06:45,554 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 183 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2023-09-01 03:06:45,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 200 transitions, 1504 flow [2023-09-01 03:06:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:06:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:06:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1346 transitions. [2023-09-01 03:06:45,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381510416666667 [2023-09-01 03:06:45,557 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1346 transitions. [2023-09-01 03:06:45,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1346 transitions. [2023-09-01 03:06:45,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:06:45,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1346 transitions. [2023-09-01 03:06:45,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.25) internal successors, (1346), 8 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:45,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:45,580 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:45,580 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 436 flow. Second operand 8 states and 1346 transitions. [2023-09-01 03:06:45,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 200 transitions, 1504 flow [2023-09-01 03:06:47,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 200 transitions, 1485 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 03:06:47,555 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 520 flow [2023-09-01 03:06:47,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2023-09-01 03:06:47,556 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2023-09-01 03:06:47,556 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 520 flow [2023-09-01 03:06:47,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:47,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:06:47,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:06:47,565 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 [2023-09-01 03:06:47,761 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 [2023-09-01 03:06:47,762 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:06:47,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:06:47,762 INFO L85 PathProgramCache]: Analyzing trace with hash 378904885, now seen corresponding path program 2 times [2023-09-01 03:06:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:06:47,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717290875] [2023-09-01 03:06:47,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:06:47,762 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 [2023-09-01 03:06:47,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:06:47,764 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) [2023-09-01 03:06:47,767 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 [2023-09-01 03:06:47,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:06:47,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:06:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:06:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:06:48,114 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:06:48,115 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:06:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:06:48,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:06:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:06:49,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:06:49,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717290875] [2023-09-01 03:06:49,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717290875] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:06:49,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:06:49,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 03:06:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429985856] [2023-09-01 03:06:49,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:06:49,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:06:49,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:06:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:06:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:06:59,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-09-01 03:06:59,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:06:59,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:06:59,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-09-01 03:06:59,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:07:39,485 INFO L130 PetriNetUnfolder]: 183763/238130 cut-off events. [2023-09-01 03:07:39,485 INFO L131 PetriNetUnfolder]: For 878235/903610 co-relation queries the response was YES. [2023-09-01 03:07:42,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978910 conditions, 238130 events. 183763/238130 cut-off events. For 878235/903610 co-relation queries the response was YES. Maximal size of possible extension queue 5117. Compared 1435100 event pairs, 69301 based on Foata normal form. 26881/265003 useless extension candidates. Maximal degree in co-relation 978862. Up to 105814 conditions per place. [2023-09-01 03:07:43,550 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 475 selfloop transitions, 24 changer transitions 0/501 dead transitions. [2023-09-01 03:07:43,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 501 transitions, 4014 flow [2023-09-01 03:07:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 03:07:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 03:07:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3085 transitions. [2023-09-01 03:07:43,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42283442982456143 [2023-09-01 03:07:43,555 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3085 transitions. [2023-09-01 03:07:43,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3085 transitions. [2023-09-01 03:07:43,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:07:43,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3085 transitions. [2023-09-01 03:07:43,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.3684210526316) internal successors, (3085), 19 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:43,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:43,564 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:43,564 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 520 flow. Second operand 19 states and 3085 transitions. [2023-09-01 03:07:43,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 501 transitions, 4014 flow [2023-09-01 03:07:48,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 501 transitions, 3792 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-09-01 03:07:48,342 INFO L231 Difference]: Finished difference. Result has 135 places, 87 transitions, 662 flow [2023-09-01 03:07:48,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=662, PETRI_PLACES=135, PETRI_TRANSITIONS=87} [2023-09-01 03:07:48,344 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2023-09-01 03:07:48,344 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 87 transitions, 662 flow [2023-09-01 03:07:48,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:48,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:07:48,345 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:07:48,355 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 [2023-09-01 03:07:48,553 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 [2023-09-01 03:07:48,554 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:07:48,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:07:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -796862084, now seen corresponding path program 3 times [2023-09-01 03:07:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:07:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396172150] [2023-09-01 03:07:48,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:07:48,555 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 [2023-09-01 03:07:48,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:07:48,556 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) [2023-09-01 03:07:48,559 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 [2023-09-01 03:07:48,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:07:48,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:07:48,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:07:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:07:48,952 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:07:48,953 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:07:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:49,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:07:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:51,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:07:51,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396172150] [2023-09-01 03:07:51,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396172150] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:07:51,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:07:51,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:07:51,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630615515] [2023-09-01 03:07:51,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:07:51,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:07:51,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:07:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:07:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:08:05,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-09-01 03:08:05,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 87 transitions, 662 flow. Second operand has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:05,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:08:05,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-09-01 03:08:05,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:46,332 INFO L130 PetriNetUnfolder]: 425599/550178 cut-off events. [2023-09-01 03:09:46,332 INFO L131 PetriNetUnfolder]: For 2098057/2156156 co-relation queries the response was YES. [2023-09-01 03:09:52,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290389 conditions, 550178 events. 425599/550178 cut-off events. For 2098057/2156156 co-relation queries the response was YES. Maximal size of possible extension queue 6976. Compared 3370161 event pairs, 304837 based on Foata normal form. 58111/608272 useless extension candidates. Maximal degree in co-relation 2290336. Up to 96633 conditions per place. [2023-09-01 03:09:55,806 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 1092 selfloop transitions, 25 changer transitions 0/1119 dead transitions. [2023-09-01 03:09:55,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1119 transitions, 8909 flow [2023-09-01 03:09:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 03:09:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 03:09:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4613 transitions. [2023-09-01 03:09:55,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48052083333333334 [2023-09-01 03:09:55,811 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4613 transitions. [2023-09-01 03:09:55,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4613 transitions. [2023-09-01 03:09:55,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:55,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4613 transitions. [2023-09-01 03:09:55,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 184.52) internal successors, (4613), 25 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:55,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:55,821 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:55,821 INFO L175 Difference]: Start difference. First operand has 135 places, 87 transitions, 662 flow. Second operand 25 states and 4613 transitions. [2023-09-01 03:09:55,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 1119 transitions, 8909 flow [2023-09-01 03:10:18,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1119 transitions, 8820 flow, removed 26 selfloop flow, removed 7 redundant places. [2023-09-01 03:10:18,063 INFO L231 Difference]: Finished difference. Result has 153 places, 100 transitions, 756 flow [2023-09-01 03:10:18,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=756, PETRI_PLACES=153, PETRI_TRANSITIONS=100} [2023-09-01 03:10:18,063 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2023-09-01 03:10:18,063 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 100 transitions, 756 flow [2023-09-01 03:10:18,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:18,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:18,064 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:10:18,075 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 [2023-09-01 03:10:18,275 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 [2023-09-01 03:10:18,275 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:10:18,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash 591158824, now seen corresponding path program 2 times [2023-09-01 03:10:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:18,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442967524] [2023-09-01 03:10:18,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:10:18,276 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 [2023-09-01 03:10:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:18,277 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) [2023-09-01 03:10:18,280 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 [2023-09-01 03:10:18,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:10:18,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:10:18,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:10:18,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:18,566 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:10:18,566 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:10:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:18,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:10:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:19,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442967524] [2023-09-01 03:10:19,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442967524] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:10:19,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:10:19,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 03:10:19,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716277751] [2023-09-01 03:10:19,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:10:19,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:10:19,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:10:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:10:28,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-09-01 03:10:28,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 100 transitions, 756 flow. Second operand has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:28,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:28,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-09-01 03:10:28,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:11:59,086 INFO L130 PetriNetUnfolder]: 434799/563292 cut-off events. [2023-09-01 03:11:59,086 INFO L131 PetriNetUnfolder]: For 2186294/2246189 co-relation queries the response was YES. [2023-09-01 03:12:06,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332077 conditions, 563292 events. 434799/563292 cut-off events. For 2186294/2246189 co-relation queries the response was YES. Maximal size of possible extension queue 7695. Compared 3559969 event pairs, 217437 based on Foata normal form. 61733/625011 useless extension candidates. Maximal degree in co-relation 2332025. Up to 352210 conditions per place. [2023-09-01 03:12:08,863 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 488 selfloop transitions, 24 changer transitions 0/514 dead transitions. [2023-09-01 03:12:08,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 514 transitions, 4214 flow [2023-09-01 03:12:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 03:12:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 03:12:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3076 transitions. [2023-09-01 03:12:08,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160087719298245 [2023-09-01 03:12:08,869 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3076 transitions. [2023-09-01 03:12:08,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3076 transitions. [2023-09-01 03:12:08,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:08,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3076 transitions. [2023-09-01 03:12:08,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.89473684210526) internal successors, (3076), 19 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:08,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:08,876 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:08,876 INFO L175 Difference]: Start difference. First operand has 153 places, 100 transitions, 756 flow. Second operand 19 states and 3076 transitions. [2023-09-01 03:12:08,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 514 transitions, 4214 flow [2023-09-01 03:12:45,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 514 transitions, 4136 flow, removed 22 selfloop flow, removed 16 redundant places. [2023-09-01 03:12:45,634 INFO L231 Difference]: Finished difference. Result has 160 places, 114 transitions, 847 flow [2023-09-01 03:12:45,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=847, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2023-09-01 03:12:45,635 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 83 predicate places. [2023-09-01 03:12:45,635 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 847 flow [2023-09-01 03:12:45,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:45,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:45,636 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 03:12:45,649 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 [2023-09-01 03:12:45,849 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 [2023-09-01 03:12:45,849 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-09-01 03:12:45,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:45,850 INFO L85 PathProgramCache]: Analyzing trace with hash 725096965, now seen corresponding path program 3 times [2023-09-01 03:12:45,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:45,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127817693] [2023-09-01 03:12:45,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:12:45,851 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 [2023-09-01 03:12:45,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:45,853 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) [2023-09-01 03:12:45,854 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 [2023-09-01 03:12:46,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 03:12:46,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:12:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:12:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:46,241 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:12:46,241 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:12:46,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-09-01 03:12:46,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-09-01 03:12:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:46,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:12:46,759 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 8 treesize of output 6 [2023-09-01 03:12:46,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-09-01 03:12:46,802 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 03:12:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:48,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127817693] [2023-09-01 03:12:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127817693] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:12:48,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:12:48,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-09-01 03:12:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232492590] [2023-09-01 03:12:48,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:12:48,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:12:48,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:12:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:13:03,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 384 [2023-09-01 03:13:03,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 847 flow. Second operand has 21 states, 21 states have (on average 152.23809523809524) internal successors, (3197), 21 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:03,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:03,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 384 [2023-09-01 03:13:03,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:44,265 INFO L130 PetriNetUnfolder]: 443249/575297 cut-off events. [2023-09-01 03:14:44,266 INFO L131 PetriNetUnfolder]: For 2651667/2713330 co-relation queries the response was YES. [2023-09-01 03:14:51,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532618 conditions, 575297 events. 443249/575297 cut-off events. For 2651667/2713330 co-relation queries the response was YES. Maximal size of possible extension queue 8075. Compared 3639543 event pairs, 234449 based on Foata normal form. 63469/638762 useless extension candidates. Maximal degree in co-relation 2532566. Up to 404383 conditions per place. [2023-09-01 03:14:55,118 INFO L137 encePairwiseOnDemand]: 374/384 looper letters, 692 selfloop transitions, 52 changer transitions 0/746 dead transitions. [2023-09-01 03:14:55,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 746 transitions, 6380 flow [2023-09-01 03:14:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:14:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:14:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4037 transitions. [2023-09-01 03:14:55,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380425347222222 [2023-09-01 03:14:55,127 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4037 transitions. [2023-09-01 03:14:55,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4037 transitions. [2023-09-01 03:14:55,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:55,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4037 transitions. [2023-09-01 03:14:55,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.20833333333334) internal successors, (4037), 24 states have internal predecessors, (4037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:55,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:55,140 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:55,140 INFO L175 Difference]: Start difference. First operand has 160 places, 114 transitions, 847 flow. Second operand 24 states and 4037 transitions. [2023-09-01 03:14:55,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 746 transitions, 6380 flow Killed by 15