./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:08:32,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:08:32,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:08:32,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:08:32,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:08:32,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:08:32,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:08:32,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:08:32,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:08:32,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:08:32,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:08:32,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:08:32,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:08:32,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:08:32,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:08:32,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:08:32,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:08:32,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:08:32,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:08:32,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:08:32,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:08:32,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:08:32,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:08:32,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:08:32,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:08:32,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:08:32,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:08:32,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:08:32,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:08:32,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:08:32,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:08:32,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:08:32,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:08:32,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:08:32,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:08:32,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:08:32,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:08:32,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:08:32,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:08:32,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:08:32,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:08:32,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:08:32,761 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:08:32,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:08:32,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:08:32,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:08:32,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:08:32,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:08:32,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:08:32,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:08:32,764 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:08:32,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:08:32,765 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:08:32,765 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:08:32,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:08:32,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:08:32,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:08:32,766 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:08:32,766 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:08:32,766 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:08:32,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:08:32,767 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:08:32,767 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:08:32,767 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:08:32,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:08:32,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:08:32,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:08:32,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:08:32,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:08:32,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:08:32,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:08:32,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:08:32,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:08:32,769 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:08:32,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:08:32,770 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:08:32,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:08:33,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:08:33,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:08:33,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:08:33,114 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:08:33,114 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:08:33,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 01:08:34,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:08:34,669 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:08:34,670 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 01:08:34,679 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff597d1ba/982c570477ae4e91ac27eb808c24e743/FLAG15bdf044b [2023-08-30 01:08:34,704 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff597d1ba/982c570477ae4e91ac27eb808c24e743 [2023-08-30 01:08:34,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:08:34,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:08:34,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:08:34,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:08:34,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:08:34,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:08:34" (1/1) ... [2023-08-30 01:08:34,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295122f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:34, skipping insertion in model container [2023-08-30 01:08:34,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:08:34" (1/1) ... [2023-08-30 01:08:34,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:08:34,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:08:34,933 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 01:08:34,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:08:34,959 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 01:08:34,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@780fbd86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:34, skipping insertion in model container [2023-08-30 01:08:34,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:08:34,962 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:08:34,964 INFO L158 Benchmark]: Toolchain (without parser) took 253.44ms. Allocated memory is still 67.1MB. Free memory was 45.0MB in the beginning and 35.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:08:34,964 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 48.2MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 52.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:08:34,966 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.64ms. Allocated memory is still 67.1MB. Free memory was 44.8MB in the beginning and 35.4MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:08:34,967 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 48.2MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 52.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.64ms. Allocated memory is still 67.1MB. Free memory was 44.8MB in the beginning and 35.4MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:08:36,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:08:36,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:08:36,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:08:36,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:08:36,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:08:36,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:08:36,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:08:36,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:08:36,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:08:36,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:08:36,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:08:36,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:08:36,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:08:36,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:08:36,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:08:36,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:08:36,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:08:36,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:08:36,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:08:36,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:08:36,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:08:36,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:08:36,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:08:36,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:08:36,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:08:36,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:08:36,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:08:36,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:08:36,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:08:36,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:08:36,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:08:36,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:08:36,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:08:36,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:08:36,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:08:36,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:08:36,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:08:36,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:08:36,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:08:36,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:08:36,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:08:36,889 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:08:36,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:08:36,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:08:36,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:08:36,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:08:36,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:08:36,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:08:36,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:08:36,893 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:08:36,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:08:36,894 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:08:36,895 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:08:36,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:08:36,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:08:36,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:08:36,895 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:08:36,895 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:08:36,896 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:08:36,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:08:36,897 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:08:36,897 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:08:36,900 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:08:36,901 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:08:36,902 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:08:36,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:08:36,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:08:36,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:08:36,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:08:36,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:08:36,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:08:36,904 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:08:36,904 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:08:36,905 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:08:36,905 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:08:36,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:08:36,905 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:08:36,905 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:08:36,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:08:37,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:08:37,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:08:37,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:08:37,252 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:08:37,253 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:08:37,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 01:08:38,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:08:38,602 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:08:38,606 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 01:08:38,614 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ded20929f/92da0bbe87894339b5e5c6bf418e56be/FLAG7d210f4ad [2023-08-30 01:08:38,638 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ded20929f/92da0bbe87894339b5e5c6bf418e56be [2023-08-30 01:08:38,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:08:38,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:08:38,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:08:38,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:08:38,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:08:38,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:38,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d13c563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38, skipping insertion in model container [2023-08-30 01:08:38,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:38,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:08:38,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:08:38,863 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2023-08-30 01:08:38,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:08:38,897 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:08:38,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:08:38,934 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 01:08:38,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:08:38,950 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:08:38,971 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 01:08:38,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:08:38,984 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:08:38,985 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:08:38,991 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:08:38,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38 WrapperNode [2023-08-30 01:08:38,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:08:38,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:08:38,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:08:38,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:08:39,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,053 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 153 [2023-08-30 01:08:39,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:08:39,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:08:39,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:08:39,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:08:39,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,111 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:08:39,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:08:39,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:08:39,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:08:39,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (1/1) ... [2023-08-30 01:08:39,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:08:39,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:08:39,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 01:08:39,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 01:08:39,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:08:39,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:08:39,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:08:39,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:08:39,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:08:39,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:08:39,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:08:39,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:08:39,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 01:08:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 01:08:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 01:08:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 01:08:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:08:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:08:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:08:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:08:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:08:39,214 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 01:08:39,358 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:08:39,360 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:08:39,909 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:08:40,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:08:40,004 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 01:08:40,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:08:40 BoogieIcfgContainer [2023-08-30 01:08:40,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:08:40,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:08:40,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:08:40,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:08:40,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:08:38" (1/3) ... [2023-08-30 01:08:40,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a696c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:08:40, skipping insertion in model container [2023-08-30 01:08:40,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:08:38" (2/3) ... [2023-08-30 01:08:40,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a696c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:08:40, skipping insertion in model container [2023-08-30 01:08:40,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:08:40" (3/3) ... [2023-08-30 01:08:40,017 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2023-08-30 01:08:40,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:08:40,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 01:08:40,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:08:40,131 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 01:08:40,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 245 transitions, 514 flow [2023-08-30 01:08:40,291 INFO L130 PetriNetUnfolder]: 20/242 cut-off events. [2023-08-30 01:08:40,291 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 01:08:40,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 20/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2023-08-30 01:08:40,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 245 transitions, 514 flow [2023-08-30 01:08:40,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 238 transitions, 494 flow [2023-08-30 01:08:40,309 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:08:40,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 238 transitions, 494 flow [2023-08-30 01:08:40,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 238 transitions, 494 flow [2023-08-30 01:08:40,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 238 transitions, 494 flow [2023-08-30 01:08:40,359 INFO L130 PetriNetUnfolder]: 20/238 cut-off events. [2023-08-30 01:08:40,360 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 01:08:40,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 238 events. 20/238 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2023-08-30 01:08:40,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 3482 [2023-08-30 01:09:08,361 INFO L134 LiptonReduction]: Checked pairs total: 5374 [2023-08-30 01:09:08,362 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-08-30 01:09:08,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:09:08,382 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;@47c4b625, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:09:08,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 01:09:08,385 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:09:08,385 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:09:08,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:09:08,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:09:08,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:09:08,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:09:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash 29773, now seen corresponding path program 1 times [2023-08-30 01:09:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:09:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871222621] [2023-08-30 01:09:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:09:08,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:09:08,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:09:08,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 01:09:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:09:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:09:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:09:08,623 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:09:08,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 01:09:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:08,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:09:08,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:09:08,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871222621] [2023-08-30 01:09:08,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871222621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:09:08,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:09:08,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:09:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141510402] [2023-08-30 01:09:08,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:09:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:09:08,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:09:08,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:09:08,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:09:08,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 495 [2023-08-30 01:09:08,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:08,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:09:08,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 495 [2023-08-30 01:09:08,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:09:10,744 INFO L130 PetriNetUnfolder]: 9642/11941 cut-off events. [2023-08-30 01:09:10,745 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-08-30 01:09:10,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24030 conditions, 11941 events. 9642/11941 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 53529 event pairs, 4611 based on Foata normal form. 0/2839 useless extension candidates. Maximal degree in co-relation 21804. Up to 11861 conditions per place. [2023-08-30 01:09:10,836 INFO L137 encePairwiseOnDemand]: 490/495 looper letters, 54 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 01:09:10,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 244 flow [2023-08-30 01:09:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:09:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:09:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 671 transitions. [2023-08-30 01:09:10,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2023-08-30 01:09:10,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 671 transitions. [2023-08-30 01:09:10,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 671 transitions. [2023-08-30 01:09:10,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:09:10,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 671 transitions. [2023-08-30 01:09:10,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:10,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:10,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:10,888 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 671 transitions. [2023-08-30 01:09:10,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 244 flow [2023-08-30 01:09:10,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 01:09:10,913 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 124 flow [2023-08-30 01:09:10,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=124, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-30 01:09:10,924 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-08-30 01:09:10,925 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 124 flow [2023-08-30 01:09:10,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:10,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:09:10,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:09:10,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:09:11,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:11,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:09:11,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:09:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 29774, now seen corresponding path program 1 times [2023-08-30 01:09:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:09:11,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440186662] [2023-08-30 01:09:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:09:11,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:11,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:09:11,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:09:11,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 01:09:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:09:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:09:11,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:09:11,388 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:09:11,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:09:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:11,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:09:11,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:09:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440186662] [2023-08-30 01:09:11,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440186662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:09:11,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:09:11,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:09:11,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595908004] [2023-08-30 01:09:11,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:09:11,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:09:11,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:09:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:09:11,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:09:11,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 495 [2023-08-30 01:09:11,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:11,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:09:11,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 495 [2023-08-30 01:09:11,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:09:14,286 INFO L130 PetriNetUnfolder]: 19283/23878 cut-off events. [2023-08-30 01:09:14,288 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 01:09:14,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 23878 events. 19283/23878 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2206. Compared 116217 event pairs, 9222 based on Foata normal form. 0/5680 useless extension candidates. Maximal degree in co-relation 47756. Up to 11862 conditions per place. [2023-08-30 01:09:14,414 INFO L137 encePairwiseOnDemand]: 486/495 looper letters, 100 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-08-30 01:09:14,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 109 transitions, 444 flow [2023-08-30 01:09:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:09:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:09:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-08-30 01:09:14,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855218855218855 [2023-08-30 01:09:14,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-08-30 01:09:14,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-08-30 01:09:14,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:09:14,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-08-30 01:09:14,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:14,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:14,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:14,426 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 124 flow. Second operand 3 states and 721 transitions. [2023-08-30 01:09:14,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 109 transitions, 444 flow [2023-08-30 01:09:14,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 109 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:09:14,429 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 173 flow [2023-08-30 01:09:14,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-08-30 01:09:14,431 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-08-30 01:09:14,431 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 173 flow [2023-08-30 01:09:14,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:14,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:09:14,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:09:14,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 01:09:14,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:14,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:09:14,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:09:14,647 INFO L85 PathProgramCache]: Analyzing trace with hash 925829, now seen corresponding path program 1 times [2023-08-30 01:09:14,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:09:14,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105223848] [2023-08-30 01:09:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:09:14,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:09:14,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:09:14,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 01:09:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:09:14,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:09:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:09:14,872 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:09:14,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:09:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:14,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:09:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:15,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:09:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105223848] [2023-08-30 01:09:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105223848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:09:15,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:09:15,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:09:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141159386] [2023-08-30 01:09:15,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:09:15,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:09:15,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:09:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:09:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:09:16,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 495 [2023-08-30 01:09:16,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:16,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:09:16,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 495 [2023-08-30 01:09:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:09:20,514 INFO L130 PetriNetUnfolder]: 28934/35831 cut-off events. [2023-08-30 01:09:20,515 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 01:09:20,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71711 conditions, 35831 events. 28934/35831 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2687. Compared 180063 event pairs, 13833 based on Foata normal form. 0/8542 useless extension candidates. Maximal degree in co-relation 71702. Up to 11863 conditions per place. [2023-08-30 01:09:20,663 INFO L137 encePairwiseOnDemand]: 483/495 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2023-08-30 01:09:20,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 176 transitions, 799 flow [2023-08-30 01:09:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:09:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:09:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1316 transitions. [2023-08-30 01:09:20,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430976430976431 [2023-08-30 01:09:20,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1316 transitions. [2023-08-30 01:09:20,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1316 transitions. [2023-08-30 01:09:20,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:09:20,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1316 transitions. [2023-08-30 01:09:20,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.33333333333334) internal successors, (1316), 6 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:20,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:20,680 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:20,681 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 173 flow. Second operand 6 states and 1316 transitions. [2023-08-30 01:09:20,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 176 transitions, 799 flow [2023-08-30 01:09:20,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 176 transitions, 775 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:09:20,685 INFO L231 Difference]: Finished difference. Result has 67 places, 84 transitions, 365 flow [2023-08-30 01:09:20,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=67, PETRI_TRANSITIONS=84} [2023-08-30 01:09:20,686 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-30 01:09:20,686 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 84 transitions, 365 flow [2023-08-30 01:09:20,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:20,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:09:20,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 01:09:20,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-30 01:09:20,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:20,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:09:20,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:09:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 28717495, now seen corresponding path program 1 times [2023-08-30 01:09:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:09:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376092143] [2023-08-30 01:09:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:09:20,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:09:20,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:09:20,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 01:09:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:09:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 01:09:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:09:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:21,074 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 01:09:21,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 01:09:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:21,319 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 01:09:21,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 01:09:21,594 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 01:09:21,595 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-30 01:09:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:24,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:09:24,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:09:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376092143] [2023-08-30 01:09:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376092143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:09:24,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:09:24,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:09:24,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380164736] [2023-08-30 01:09:24,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:09:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:09:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:09:24,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:09:24,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 01:09:26,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:09:28,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:09:30,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:09:33,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:09:35,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:09:37,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:09:37,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 495 [2023-08-30 01:09:37,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:37,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:09:37,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 495 [2023-08-30 01:09:37,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:09:39,631 INFO L130 PetriNetUnfolder]: 22362/27960 cut-off events. [2023-08-30 01:09:39,631 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-30 01:09:39,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56031 conditions, 27960 events. 22362/27960 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 142301 event pairs, 10683 based on Foata normal form. 0/7115 useless extension candidates. Maximal degree in co-relation 56018. Up to 27720 conditions per place. [2023-08-30 01:09:39,782 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 76 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-30 01:09:39,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 499 flow [2023-08-30 01:09:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:09:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:09:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-30 01:09:39,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38855218855218854 [2023-08-30 01:09:39,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-30 01:09:39,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-30 01:09:39,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:09:39,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-30 01:09:39,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:39,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:39,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:39,791 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 365 flow. Second operand 3 states and 577 transitions. [2023-08-30 01:09:39,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 499 flow [2023-08-30 01:09:39,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 469 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 01:09:39,794 INFO L231 Difference]: Finished difference. Result has 66 places, 80 transitions, 317 flow [2023-08-30 01:09:39,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=66, PETRI_TRANSITIONS=80} [2023-08-30 01:09:39,795 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-30 01:09:39,796 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 80 transitions, 317 flow [2023-08-30 01:09:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:39,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:09:39,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 01:09:39,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 01:09:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:40,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:09:40,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:09:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash 28717496, now seen corresponding path program 1 times [2023-08-30 01:09:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:09:40,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348136517] [2023-08-30 01:09:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:09:40,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:09:40,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:09:40,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 01:09:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:09:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 01:09:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:09:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:40,212 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 01:09:40,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 01:09:40,242 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 01:09:40,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 01:09:40,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:40,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:09:40,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:40,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:09:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:40,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:09:40,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:09:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348136517] [2023-08-30 01:09:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348136517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:09:40,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:09:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:09:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879052485] [2023-08-30 01:09:40,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:09:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:09:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:09:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:09:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:09:40,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 495 [2023-08-30 01:09:40,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:40,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:09:40,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 495 [2023-08-30 01:09:40,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:09:42,483 INFO L130 PetriNetUnfolder]: 15790/20089 cut-off events. [2023-08-30 01:09:42,484 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-30 01:09:42,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 20089 events. 15790/20089 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 103825 event pairs, 7533 based on Foata normal form. 0/5693 useless extension candidates. Maximal degree in co-relation 40249. Up to 19849 conditions per place. [2023-08-30 01:09:42,595 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 72 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 01:09:42,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 443 flow [2023-08-30 01:09:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:09:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:09:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-30 01:09:42,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46195286195286195 [2023-08-30 01:09:42,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-30 01:09:42,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-30 01:09:42,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:09:42,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-30 01:09:42,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:42,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:42,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:42,605 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 317 flow. Second operand 3 states and 686 transitions. [2023-08-30 01:09:42,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 443 flow [2023-08-30 01:09:42,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:09:42,608 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 298 flow [2023-08-30 01:09:42,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2023-08-30 01:09:42,609 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-30 01:09:42,609 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 298 flow [2023-08-30 01:09:42,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:42,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:09:42,610 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:09:42,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 01:09:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:42,813 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:09:42,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:09:42,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1814383118, now seen corresponding path program 2 times [2023-08-30 01:09:42,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:09:42,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060885943] [2023-08-30 01:09:42,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:09:42,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:09:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:09:42,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:09:42,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 01:09:42,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:09:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:09:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:09:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:09:43,037 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:09:43,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:09:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:09:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:09:43,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:09:43,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060885943] [2023-08-30 01:09:43,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060885943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:09:43,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:09:43,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:09:43,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340977143] [2023-08-30 01:09:43,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:09:43,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:09:43,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:09:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:09:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:09:48,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 495 [2023-08-30 01:09:48,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 298 flow. Second operand has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:48,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:09:48,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 495 [2023-08-30 01:09:48,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:09:50,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:52,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:54,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:56,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:58,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:10:00,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:10:02,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:10:04,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:10:06,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:10:08,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:10:18,260 INFO L130 PetriNetUnfolder]: 52614/66922 cut-off events. [2023-08-30 01:10:18,260 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 01:10:18,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134017 conditions, 66922 events. 52614/66922 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 3076. Compared 378769 event pairs, 25110 based on Foata normal form. 16/18971 useless extension candidates. Maximal degree in co-relation 134002. Up to 6629 conditions per place. [2023-08-30 01:10:18,538 INFO L137 encePairwiseOnDemand]: 485/495 looper letters, 429 selfloop transitions, 53 changer transitions 0/485 dead transitions. [2023-08-30 01:10:18,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 485 transitions, 2302 flow [2023-08-30 01:10:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 01:10:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 01:10:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3378 transitions. [2023-08-30 01:10:18,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494949494949494 [2023-08-30 01:10:18,549 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3378 transitions. [2023-08-30 01:10:18,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3378 transitions. [2023-08-30 01:10:18,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:10:18,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3378 transitions. [2023-08-30 01:10:18,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 225.2) internal successors, (3378), 15 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:18,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 495.0) internal successors, (7920), 16 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:18,568 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 495.0) internal successors, (7920), 16 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:18,568 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 298 flow. Second operand 15 states and 3378 transitions. [2023-08-30 01:10:18,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 485 transitions, 2302 flow [2023-08-30 01:10:18,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 485 transitions, 2301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:10:18,575 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 695 flow [2023-08-30 01:10:18,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=695, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2023-08-30 01:10:18,576 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-08-30 01:10:18,576 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 695 flow [2023-08-30 01:10:18,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:18,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:10:18,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:10:18,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 01:10:18,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:10:18,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:10:18,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:10:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1827731773, now seen corresponding path program 1 times [2023-08-30 01:10:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:10:18,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502972194] [2023-08-30 01:10:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:10:18,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:10:18,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:10:18,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:10:18,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 01:10:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:10:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 01:10:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:10:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:10:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:10:18,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:10:18,978 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 01:10:18,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 01:10:18,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 01:10:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:10:19,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:10:19,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:10:19,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:10:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:10:19,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:10:19,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:10:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502972194] [2023-08-30 01:10:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502972194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:10:19,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:10:19,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:10:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157216281] [2023-08-30 01:10:19,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:10:19,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:10:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:10:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:10:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:10:19,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 495 [2023-08-30 01:10:19,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 695 flow. Second operand has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:19,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:10:19,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 495 [2023-08-30 01:10:19,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:10:24,254 INFO L130 PetriNetUnfolder]: 50544/64232 cut-off events. [2023-08-30 01:10:24,254 INFO L131 PetriNetUnfolder]: For 227/227 co-relation queries the response was YES. [2023-08-30 01:10:24,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128773 conditions, 64232 events. 50544/64232 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 2719. Compared 361929 event pairs, 24120 based on Foata normal form. 0/18530 useless extension candidates. Maximal degree in co-relation 128747. Up to 63432 conditions per place. [2023-08-30 01:10:24,558 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 102 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-30 01:10:24,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 897 flow [2023-08-30 01:10:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:10:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:10:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-30 01:10:24,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2023-08-30 01:10:24,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-30 01:10:24,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-30 01:10:24,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:10:24,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-30 01:10:24,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:24,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:24,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:24,566 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 695 flow. Second operand 3 states and 684 transitions. [2023-08-30 01:10:24,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 897 flow [2023-08-30 01:10:24,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 795 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-30 01:10:24,571 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 591 flow [2023-08-30 01:10:24,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=591, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2023-08-30 01:10:24,572 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2023-08-30 01:10:24,572 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 591 flow [2023-08-30 01:10:24,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:24,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:10:24,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:10:24,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 01:10:24,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:10:24,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:10:24,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:10:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1827731774, now seen corresponding path program 1 times [2023-08-30 01:10:24,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:10:24,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468222867] [2023-08-30 01:10:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:10:24,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:10:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:10:24,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:10:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 01:10:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:10:24,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 01:10:24,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:10:24,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:10:24,916 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 01:10:24,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 01:10:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:10:25,096 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 01:10:25,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 01:10:29,308 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 01:10:29,308 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 3 case distinctions, treesize of input 51 treesize of output 76 [2023-08-30 01:10:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:10:31,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:10:31,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:10:31,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468222867] [2023-08-30 01:10:31,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468222867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:10:31,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:10:31,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:10:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443043212] [2023-08-30 01:10:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:10:31,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:10:31,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:10:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:10:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2023-08-30 01:10:34,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:36,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:38,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:41,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:43,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:45,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:47,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:49,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:51,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:53,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:55,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:57,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 01:10:57,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 495 [2023-08-30 01:10:57,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 591 flow. Second operand has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:10:57,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:10:57,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 495 [2023-08-30 01:10:57,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:04,222 WARN L222 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 42 DAG size of output: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:11:09,051 INFO L130 PetriNetUnfolder]: 48474/61542 cut-off events. [2023-08-30 01:11:09,051 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-08-30 01:11:09,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123332 conditions, 61542 events. 48474/61542 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 2661. Compared 344056 event pairs, 23130 based on Foata normal form. 0/18122 useless extension candidates. Maximal degree in co-relation 123305. Up to 60742 conditions per place. [2023-08-30 01:11:09,333 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 100 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-30 01:11:09,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 789 flow [2023-08-30 01:11:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-08-30 01:11:09,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845117845117845 [2023-08-30 01:11:09,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-08-30 01:11:09,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-08-30 01:11:09,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:09,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-08-30 01:11:09,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:09,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:09,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:09,340 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 591 flow. Second operand 3 states and 571 transitions. [2023-08-30 01:11:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 789 flow [2023-08-30 01:11:09,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:09,345 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 588 flow [2023-08-30 01:11:09,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2023-08-30 01:11:09,345 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-08-30 01:11:09,346 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 588 flow [2023-08-30 01:11:09,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:09,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:09,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:09,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:09,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:09,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:11:09,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash 825103132, now seen corresponding path program 1 times [2023-08-30 01:11:09,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:09,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135057910] [2023-08-30 01:11:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:09,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:09,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:09,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 01:11:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:11:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:09,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:09,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:09,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135057910] [2023-08-30 01:11:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135057910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:09,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:09,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:11:09,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292224577] [2023-08-30 01:11:09,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:09,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:11:09,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:11:09,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:11:09,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 495 [2023-08-30 01:11:09,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 588 flow. Second operand has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:09,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:09,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 495 [2023-08-30 01:11:09,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:14,531 INFO L130 PetriNetUnfolder]: 39814/52154 cut-off events. [2023-08-30 01:11:14,531 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2023-08-30 01:11:14,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104634 conditions, 52154 events. 39814/52154 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 2562. Compared 311299 event pairs, 21116 based on Foata normal form. 2/17347 useless extension candidates. Maximal degree in co-relation 104606. Up to 49045 conditions per place. [2023-08-30 01:11:14,806 INFO L137 encePairwiseOnDemand]: 482/495 looper letters, 130 selfloop transitions, 28 changer transitions 0/160 dead transitions. [2023-08-30 01:11:14,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 160 transitions, 1034 flow [2023-08-30 01:11:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:11:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:11:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2023-08-30 01:11:14,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494949494949494 [2023-08-30 01:11:14,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2023-08-30 01:11:14,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2023-08-30 01:11:14,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:14,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2023-08-30 01:11:14,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:14,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:14,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:14,816 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 588 flow. Second operand 5 states and 1126 transitions. [2023-08-30 01:11:14,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 160 transitions, 1034 flow [2023-08-30 01:11:14,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 160 transitions, 1033 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:14,821 INFO L231 Difference]: Finished difference. Result has 89 places, 107 transitions, 703 flow [2023-08-30 01:11:14,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=703, PETRI_PLACES=89, PETRI_TRANSITIONS=107} [2023-08-30 01:11:14,822 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-08-30 01:11:14,822 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 107 transitions, 703 flow [2023-08-30 01:11:14,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:14,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:14,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:14,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:15,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:15,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:11:15,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash -191367404, now seen corresponding path program 1 times [2023-08-30 01:11:15,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:15,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667066510] [2023-08-30 01:11:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:15,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:15,035 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:15,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 01:11:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:15,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 01:11:15,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:15,197 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 01:11:15,198 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 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 01:11:15,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:15,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 01:11:15,271 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 01:11:15,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 01:11:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:15,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:15,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:15,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667066510] [2023-08-30 01:11:15,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667066510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:15,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:15,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:11:15,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095285164] [2023-08-30 01:11:15,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:15,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:11:15,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:11:15,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:11:15,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 495 [2023-08-30 01:11:15,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 107 transitions, 703 flow. Second operand has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:15,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:15,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 495 [2023-08-30 01:11:15,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:20,420 INFO L130 PetriNetUnfolder]: 43602/55071 cut-off events. [2023-08-30 01:11:20,420 INFO L131 PetriNetUnfolder]: For 1655/1780 co-relation queries the response was YES. [2023-08-30 01:11:20,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122360 conditions, 55071 events. 43602/55071 cut-off events. For 1655/1780 co-relation queries the response was YES. Maximal size of possible extension queue 2256. Compared 304374 event pairs, 20448 based on Foata normal form. 125/19197 useless extension candidates. Maximal degree in co-relation 122328. Up to 54411 conditions per place. [2023-08-30 01:11:20,801 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 100 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-08-30 01:11:20,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 105 transitions, 901 flow [2023-08-30 01:11:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-30 01:11:20,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498316498316498 [2023-08-30 01:11:20,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-30 01:11:20,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-30 01:11:20,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:20,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-30 01:11:20,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:20,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:20,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:20,808 INFO L175 Difference]: Start difference. First operand has 89 places, 107 transitions, 703 flow. Second operand 3 states and 668 transitions. [2023-08-30 01:11:20,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 105 transitions, 901 flow [2023-08-30 01:11:20,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 105 transitions, 869 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:20,829 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 669 flow [2023-08-30 01:11:20,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=669, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2023-08-30 01:11:20,829 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-08-30 01:11:20,830 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 669 flow [2023-08-30 01:11:20,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:20,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:20,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:20,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:21,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:21,040 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:11:21,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash -191367406, now seen corresponding path program 1 times [2023-08-30 01:11:21,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:21,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088305406] [2023-08-30 01:11:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:21,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:21,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:21,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:21,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 01:11:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:21,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:11:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:21,249 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 01:11:21,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 01:11:21,284 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 454 treesize of output 442 [2023-08-30 01:11:21,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:21,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:11:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:21,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:11:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:21,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:21,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:21,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088305406] [2023-08-30 01:11:21,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088305406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:21,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:21,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:11:21,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327617292] [2023-08-30 01:11:21,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:21,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:11:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:11:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:11:21,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 495 [2023-08-30 01:11:21,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 669 flow. Second operand has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:21,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:21,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 495 [2023-08-30 01:11:21,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:26,668 INFO L130 PetriNetUnfolder]: 41311/52054 cut-off events. [2023-08-30 01:11:26,668 INFO L131 PetriNetUnfolder]: For 1531/1647 co-relation queries the response was YES. [2023-08-30 01:11:26,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115510 conditions, 52054 events. 41311/52054 cut-off events. For 1531/1647 co-relation queries the response was YES. Maximal size of possible extension queue 2117. Compared 283128 event pairs, 19295 based on Foata normal form. 116/18596 useless extension candidates. Maximal degree in co-relation 115477. Up to 51394 conditions per place. [2023-08-30 01:11:26,991 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 98 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-30 01:11:26,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 103 transitions, 863 flow [2023-08-30 01:11:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-30 01:11:26,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45252525252525255 [2023-08-30 01:11:26,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-30 01:11:26,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-30 01:11:26,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:26,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-30 01:11:26,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:26,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:27,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:27,000 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 669 flow. Second operand 3 states and 672 transitions. [2023-08-30 01:11:27,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 103 transitions, 863 flow [2023-08-30 01:11:27,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 103 transitions, 862 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:27,014 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 666 flow [2023-08-30 01:11:27,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2023-08-30 01:11:27,015 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2023-08-30 01:11:27,015 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 666 flow [2023-08-30 01:11:27,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:27,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:27,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:27,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:27,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:27,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:11:27,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1637429100, now seen corresponding path program 1 times [2023-08-30 01:11:27,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:27,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349510330] [2023-08-30 01:11:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:27,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:27,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:27,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:27,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 01:11:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:27,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:11:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:27,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 01:11:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:27,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:27,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:27,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349510330] [2023-08-30 01:11:27,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349510330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:27,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:27,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:11:27,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795573753] [2023-08-30 01:11:27,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:27,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:11:27,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:27,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:11:27,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:11:27,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 495 [2023-08-30 01:11:27,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:27,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:27,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 495 [2023-08-30 01:11:27,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:30,967 INFO L130 PetriNetUnfolder]: 30671/38894 cut-off events. [2023-08-30 01:11:30,967 INFO L131 PetriNetUnfolder]: For 1242/1329 co-relation queries the response was YES. [2023-08-30 01:11:31,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86527 conditions, 38894 events. 30671/38894 cut-off events. For 1242/1329 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 208237 event pairs, 14069 based on Foata normal form. 87/14956 useless extension candidates. Maximal degree in co-relation 86493. Up to 38237 conditions per place. [2023-08-30 01:11:31,242 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 90 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2023-08-30 01:11:31,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 856 flow [2023-08-30 01:11:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:11:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:11:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 847 transitions. [2023-08-30 01:11:31,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2023-08-30 01:11:31,245 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 847 transitions. [2023-08-30 01:11:31,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 847 transitions. [2023-08-30 01:11:31,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:31,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 847 transitions. [2023-08-30 01:11:31,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:31,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:31,249 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:31,249 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 666 flow. Second operand 4 states and 847 transitions. [2023-08-30 01:11:31,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 856 flow [2023-08-30 01:11:31,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 101 transitions, 855 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:31,263 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 675 flow [2023-08-30 01:11:31,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=675, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2023-08-30 01:11:31,264 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2023-08-30 01:11:31,264 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 675 flow [2023-08-30 01:11:31,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:31,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:31,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:31,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:31,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:31,474 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:11:31,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1637429104, now seen corresponding path program 1 times [2023-08-30 01:11:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:31,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694998405] [2023-08-30 01:11:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:31,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:31,476 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:31,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 01:11:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:31,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:11:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:31,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:31,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:31,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694998405] [2023-08-30 01:11:31,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694998405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:31,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:31,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:11:31,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587669977] [2023-08-30 01:11:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:31,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:11:31,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:11:31,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:11:31,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 495 [2023-08-30 01:11:31,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 675 flow. Second operand has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:31,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:31,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 495 [2023-08-30 01:11:31,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:34,851 INFO L130 PetriNetUnfolder]: 24453/32506 cut-off events. [2023-08-30 01:11:34,851 INFO L131 PetriNetUnfolder]: For 1887/1922 co-relation queries the response was YES. [2023-08-30 01:11:34,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73446 conditions, 32506 events. 24453/32506 cut-off events. For 1887/1922 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 188056 event pairs, 13702 based on Foata normal form. 35/14516 useless extension candidates. Maximal degree in co-relation 73411. Up to 31531 conditions per place. [2023-08-30 01:11:35,044 INFO L137 encePairwiseOnDemand]: 481/495 looper letters, 102 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2023-08-30 01:11:35,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1015 flow [2023-08-30 01:11:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:11:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:11:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1097 transitions. [2023-08-30 01:11:35,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44323232323232326 [2023-08-30 01:11:35,046 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1097 transitions. [2023-08-30 01:11:35,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1097 transitions. [2023-08-30 01:11:35,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:35,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1097 transitions. [2023-08-30 01:11:35,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.4) internal successors, (1097), 5 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:35,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:35,050 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:35,051 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 675 flow. Second operand 5 states and 1097 transitions. [2023-08-30 01:11:35,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1015 flow [2023-08-30 01:11:35,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1006 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:11:35,058 INFO L231 Difference]: Finished difference. Result has 91 places, 102 transitions, 744 flow [2023-08-30 01:11:35,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=744, PETRI_PLACES=91, PETRI_TRANSITIONS=102} [2023-08-30 01:11:35,059 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-08-30 01:11:35,059 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 102 transitions, 744 flow [2023-08-30 01:11:35,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:35,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:35,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:35,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:35,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:35,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:11:35,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash -414734544, now seen corresponding path program 1 times [2023-08-30 01:11:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:35,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461423438] [2023-08-30 01:11:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:35,274 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:35,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 01:11:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 01:11:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:35,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 01:11:35,519 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 01:11:35,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 01:11:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:11:35,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:11:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:11:36,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:36,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461423438] [2023-08-30 01:11:36,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461423438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:11:36,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:11:36,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:11:36,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478950397] [2023-08-30 01:11:36,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:11:36,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:11:36,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:11:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:11:40,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 495 [2023-08-30 01:11:40,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 744 flow. Second operand has 12 states, 12 states have (on average 185.66666666666666) internal successors, (2228), 12 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:40,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 495 [2023-08-30 01:11:40,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:59,316 INFO L130 PetriNetUnfolder]: 114756/148556 cut-off events. [2023-08-30 01:11:59,316 INFO L131 PetriNetUnfolder]: For 13513/13551 co-relation queries the response was YES. [2023-08-30 01:11:59,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365793 conditions, 148556 events. 114756/148556 cut-off events. For 13513/13551 co-relation queries the response was YES. Maximal size of possible extension queue 6132. Compared 985221 event pairs, 46628 based on Foata normal form. 147/66688 useless extension candidates. Maximal degree in co-relation 365756. Up to 46285 conditions per place. [2023-08-30 01:12:00,347 INFO L137 encePairwiseOnDemand]: 481/495 looper letters, 514 selfloop transitions, 69 changer transitions 0/586 dead transitions. [2023-08-30 01:12:00,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 586 transitions, 3744 flow [2023-08-30 01:12:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 01:12:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 01:12:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4757 transitions. [2023-08-30 01:12:00,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178304787000439 [2023-08-30 01:12:00,355 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4757 transitions. [2023-08-30 01:12:00,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4757 transitions. [2023-08-30 01:12:00,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:00,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4757 transitions. [2023-08-30 01:12:00,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 206.82608695652175) internal successors, (4757), 23 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:00,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 495.0) internal successors, (11880), 24 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:00,370 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 495.0) internal successors, (11880), 24 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:00,371 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 744 flow. Second operand 23 states and 4757 transitions. [2023-08-30 01:12:00,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 586 transitions, 3744 flow [2023-08-30 01:12:01,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 586 transitions, 3657 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:12:01,059 INFO L231 Difference]: Finished difference. Result has 127 places, 141 transitions, 1285 flow [2023-08-30 01:12:01,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1285, PETRI_PLACES=127, PETRI_TRANSITIONS=141} [2023-08-30 01:12:01,059 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 62 predicate places. [2023-08-30 01:12:01,060 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 141 transitions, 1285 flow [2023-08-30 01:12:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 185.66666666666666) internal successors, (2228), 12 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:01,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:01,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:12:01,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:01,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:01,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:12:01,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash -414734678, now seen corresponding path program 1 times [2023-08-30 01:12:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206372256] [2023-08-30 01:12:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:12:01,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:01,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:01,263 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:01,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 01:12:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:12:01,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 01:12:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:01,504 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:12:01,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:12:01,593 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:12:01,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 01:12:01,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:12:01,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 01:12:01,727 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 01:12:01,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 01:12:01,779 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 01:12:01,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 01:12:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:12:01,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:12:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:12:04,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:04,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206372256] [2023-08-30 01:12:04,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206372256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:12:04,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:12:04,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:12:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039092014] [2023-08-30 01:12:04,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:12:04,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:12:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:04,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:12:04,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:12:15,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 495 [2023-08-30 01:12:15,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 141 transitions, 1285 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:15,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:12:15,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 495 [2023-08-30 01:12:15,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:22,027 WARN L222 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 36 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:12:35,288 WARN L222 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:13:11,388 INFO L130 PetriNetUnfolder]: 113443/146165 cut-off events. [2023-08-30 01:13:11,389 INFO L131 PetriNetUnfolder]: For 104280/104318 co-relation queries the response was YES. [2023-08-30 01:13:12,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396493 conditions, 146165 events. 113443/146165 cut-off events. For 104280/104318 co-relation queries the response was YES. Maximal size of possible extension queue 5823. Compared 961243 event pairs, 29650 based on Foata normal form. 38/68386 useless extension candidates. Maximal degree in co-relation 396440. Up to 45379 conditions per place. [2023-08-30 01:13:12,812 INFO L137 encePairwiseOnDemand]: 479/495 looper letters, 426 selfloop transitions, 116 changer transitions 0/545 dead transitions. [2023-08-30 01:13:12,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 545 transitions, 3827 flow [2023-08-30 01:13:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 01:13:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 01:13:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4677 transitions. [2023-08-30 01:13:12,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936868686868687 [2023-08-30 01:13:12,822 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4677 transitions. [2023-08-30 01:13:12,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4677 transitions. [2023-08-30 01:13:12,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:13:12,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4677 transitions. [2023-08-30 01:13:12,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 194.875) internal successors, (4677), 24 states have internal predecessors, (4677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:12,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:12,845 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:12,845 INFO L175 Difference]: Start difference. First operand has 127 places, 141 transitions, 1285 flow. Second operand 24 states and 4677 transitions. [2023-08-30 01:13:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 545 transitions, 3827 flow [2023-08-30 01:13:15,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 545 transitions, 3773 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 01:13:15,005 INFO L231 Difference]: Finished difference. Result has 153 places, 182 transitions, 1819 flow [2023-08-30 01:13:15,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1819, PETRI_PLACES=153, PETRI_TRANSITIONS=182} [2023-08-30 01:13:15,006 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 88 predicate places. [2023-08-30 01:13:15,006 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 182 transitions, 1819 flow [2023-08-30 01:13:15,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:15,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:13:15,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:13:15,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 01:13:15,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:15,208 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:13:15,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:13:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash -414734676, now seen corresponding path program 1 times [2023-08-30 01:13:15,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:13:15,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789937013] [2023-08-30 01:13:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:13:15,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:15,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:13:15,210 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:13:15,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 01:13:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:13:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:13:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:13:15,395 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:13:15,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 01:13:15,419 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 01:13:15,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 01:13:15,436 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 01:13:15,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 01:13:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:13:15,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:13:15,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:13:15,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789937013] [2023-08-30 01:13:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789937013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:13:15,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:13:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:13:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704087909] [2023-08-30 01:13:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:13:15,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:13:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:13:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:13:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:13:15,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 495 [2023-08-30 01:13:15,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 182 transitions, 1819 flow. Second operand has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:15,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:13:15,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 495 [2023-08-30 01:13:15,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:13:29,486 INFO L130 PetriNetUnfolder]: 88142/112450 cut-off events. [2023-08-30 01:13:29,486 INFO L131 PetriNetUnfolder]: For 148927/151617 co-relation queries the response was YES. [2023-08-30 01:13:30,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344164 conditions, 112450 events. 88142/112450 cut-off events. For 148927/151617 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 698016 event pairs, 42658 based on Foata normal form. 7591/68106 useless extension candidates. Maximal degree in co-relation 344105. Up to 111301 conditions per place. [2023-08-30 01:13:30,584 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 158 selfloop transitions, 12 changer transitions 0/180 dead transitions. [2023-08-30 01:13:30,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 180 transitions, 2151 flow [2023-08-30 01:13:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:13:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:13:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-08-30 01:13:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2023-08-30 01:13:30,586 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-08-30 01:13:30,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-08-30 01:13:30,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:13:30,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-08-30 01:13:30,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:30,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:30,590 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:30,590 INFO L175 Difference]: Start difference. First operand has 153 places, 182 transitions, 1819 flow. Second operand 4 states and 837 transitions. [2023-08-30 01:13:30,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 180 transitions, 2151 flow [2023-08-30 01:13:38,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 180 transitions, 1942 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-30 01:13:38,178 INFO L231 Difference]: Finished difference. Result has 150 places, 180 transitions, 1626 flow [2023-08-30 01:13:38,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1626, PETRI_PLACES=150, PETRI_TRANSITIONS=180} [2023-08-30 01:13:38,179 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 85 predicate places. [2023-08-30 01:13:38,179 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 180 transitions, 1626 flow [2023-08-30 01:13:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:38,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:13:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:13:38,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:13:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:38,385 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:13:38,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:13:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -414734545, now seen corresponding path program 1 times [2023-08-30 01:13:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:13:38,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615500562] [2023-08-30 01:13:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:13:38,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:13:38,387 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:13:38,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 01:13:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:13:38,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:13:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:13:38,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 01:13:38,570 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 01:13:38,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 01:13:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:13:38,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:13:38,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:13:38,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615500562] [2023-08-30 01:13:38,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615500562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:13:38,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:13:38,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:13:38,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169093765] [2023-08-30 01:13:38,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:13:38,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:13:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:13:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:13:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:13:38,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 495 [2023-08-30 01:13:38,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 180 transitions, 1626 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:38,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:13:38,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 495 [2023-08-30 01:13:38,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:13:48,659 INFO L130 PetriNetUnfolder]: 63492/81462 cut-off events. [2023-08-30 01:13:48,659 INFO L131 PetriNetUnfolder]: For 77737/80031 co-relation queries the response was YES. [2023-08-30 01:13:49,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233404 conditions, 81462 events. 63492/81462 cut-off events. For 77737/80031 co-relation queries the response was YES. Maximal size of possible extension queue 3124. Compared 494558 event pairs, 30513 based on Foata normal form. 2294/51293 useless extension candidates. Maximal degree in co-relation 233346. Up to 80612 conditions per place. [2023-08-30 01:13:49,442 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 134 selfloop transitions, 24 changer transitions 0/168 dead transitions. [2023-08-30 01:13:49,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 168 transitions, 1877 flow [2023-08-30 01:13:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:13:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:13:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2023-08-30 01:13:49,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42373737373737375 [2023-08-30 01:13:49,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2023-08-30 01:13:49,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2023-08-30 01:13:49,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:13:49,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2023-08-30 01:13:49,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,447 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,447 INFO L175 Difference]: Start difference. First operand has 150 places, 180 transitions, 1626 flow. Second operand 4 states and 839 transitions. [2023-08-30 01:13:49,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 168 transitions, 1877 flow [2023-08-30 01:13:51,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 168 transitions, 1864 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:13:51,147 INFO L231 Difference]: Finished difference. Result has 149 places, 168 transitions, 1596 flow [2023-08-30 01:13:51,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1596, PETRI_PLACES=149, PETRI_TRANSITIONS=168} [2023-08-30 01:13:51,147 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 84 predicate places. [2023-08-30 01:13:51,148 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 168 transitions, 1596 flow [2023-08-30 01:13:51,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:51,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:13:51,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:13:51,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 01:13:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:51,356 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:13:51,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:13:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1604115565, now seen corresponding path program 1 times [2023-08-30 01:13:51,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:13:51,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788264945] [2023-08-30 01:13:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:13:51,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:13:51,358 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:13:51,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 01:13:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:13:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:13:51,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:13:51,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 01:13:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:13:51,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:13:51,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:13:51,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788264945] [2023-08-30 01:13:51,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788264945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:13:51,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:13:51,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:13:51,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135391443] [2023-08-30 01:13:51,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:13:51,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:13:51,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:13:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:13:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:13:52,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 495 [2023-08-30 01:13:52,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 168 transitions, 1596 flow. Second operand has 6 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:52,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:13:52,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 495 [2023-08-30 01:13:52,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:14:06,701 INFO L130 PetriNetUnfolder]: 90456/117466 cut-off events. [2023-08-30 01:14:06,701 INFO L131 PetriNetUnfolder]: For 141644/145366 co-relation queries the response was YES. [2023-08-30 01:14:07,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343605 conditions, 117466 events. 90456/117466 cut-off events. For 141644/145366 co-relation queries the response was YES. Maximal size of possible extension queue 4449. Compared 767194 event pairs, 32426 based on Foata normal form. 3722/80737 useless extension candidates. Maximal degree in co-relation 343547. Up to 76058 conditions per place. [2023-08-30 01:14:07,912 INFO L137 encePairwiseOnDemand]: 490/495 looper letters, 190 selfloop transitions, 17 changer transitions 0/216 dead transitions. [2023-08-30 01:14:07,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 216 transitions, 2278 flow [2023-08-30 01:14:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:14:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:14:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2023-08-30 01:14:07,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2023-08-30 01:14:07,915 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2023-08-30 01:14:07,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2023-08-30 01:14:07,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:14:07,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2023-08-30 01:14:07,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:14:07,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:14:07,920 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:14:07,920 INFO L175 Difference]: Start difference. First operand has 149 places, 168 transitions, 1596 flow. Second operand 5 states and 1065 transitions. [2023-08-30 01:14:07,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 216 transitions, 2278 flow [2023-08-30 01:14:10,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 216 transitions, 2253 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:14:10,861 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 1613 flow [2023-08-30 01:14:10,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2023-08-30 01:14:10,862 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 87 predicate places. [2023-08-30 01:14:10,862 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 1613 flow [2023-08-30 01:14:10,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:14:10,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:14:10,863 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:14:10,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 01:14:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:14:11,068 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 01:14:11,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:14:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash -182851922, now seen corresponding path program 3 times [2023-08-30 01:14:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:14:11,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102024338] [2023-08-30 01:14:11,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:14:11,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:14:11,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:14:11,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:14:11,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 01:14:11,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:14:11,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:14:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:14:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:14:11,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:14:11,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:14:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:14:11,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:14:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:14:13,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:14:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102024338] [2023-08-30 01:14:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102024338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:14:13,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:14:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:14:13,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149893923] [2023-08-30 01:14:13,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:14:13,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:14:13,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:14:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:14:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:14:33,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 495 [2023-08-30 01:14:33,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 1613 flow. Second operand has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:14:33,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:14:33,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 495 [2023-08-30 01:14:33,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:14:46,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:48,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:50,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:51,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:52,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:54,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:56,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:58,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:00,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:02,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:06,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:09,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:11,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:14,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:16,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:18,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:20,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:22,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:24,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:26,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:28,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:30,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:33,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:34,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:36,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:39,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:41,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:46,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:48,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []