./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:20:58,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:20:58,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:20:58,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:20:58,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:20:58,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:20:58,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:20:58,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:20:58,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:20:58,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:20:58,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:20:58,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:20:58,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:20:58,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:20:58,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:20:58,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:20:58,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:20:58,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:20:58,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:20:58,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:20:58,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:20:58,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:20:58,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:20:58,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:20:58,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:20:58,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:20:58,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:20:58,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:20:58,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:20:58,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:20:58,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:20:58,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:20:58,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:20:58,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:20:58,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:20:58,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:20:58,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:20:58,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:20:58,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:20:58,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:20:58,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:20:58,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:20:58,857 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:20:58,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:20:58,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:20:58,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:20:58,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:20:58,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:20:58,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:20:58,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:20:58,861 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:20:58,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:20:58,861 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:20:58,861 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:20:58,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:20:58,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:20:58,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:20:58,862 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:20:58,863 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:20:58,863 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:20:58,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:20:58,864 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:20:58,864 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:20:58,864 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:20:58,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:20:58,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:20:58,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:20:58,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:20:58,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:20:58,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:20:58,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:20:58,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:20:58,867 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:20:58,867 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:20:58,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:20:58,867 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:20:58,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:20:59,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:20:59,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:20:59,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:20:59,178 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:20:59,179 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:20:59,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 00:21:00,426 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:21:00,648 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:21:00,649 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 00:21:00,656 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13a4b5bbd/79315e1ae6df406abc56d2f106edfc4a/FLAG2448ba484 [2023-08-30 00:21:00,672 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13a4b5bbd/79315e1ae6df406abc56d2f106edfc4a [2023-08-30 00:21:00,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:21:00,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:21:00,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:00,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:21:00,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:21:00,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:00" (1/1) ... [2023-08-30 00:21:00,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@746eccc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:00, skipping insertion in model container [2023-08-30 00:21:00,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:00" (1/1) ... [2023-08-30 00:21:00,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:21:00,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:21:00,903 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 00:21:00,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:00,922 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:21:00,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bc828de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:00, skipping insertion in model container [2023-08-30 00:21:00,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:00,924 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:21:00,925 INFO L158 Benchmark]: Toolchain (without parser) took 248.57ms. Allocated memory is still 94.4MB. Free memory was 72.3MB in the beginning and 61.9MB in the end (delta: 10.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 00:21:00,926 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 67.1MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:21:00,927 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.08ms. Allocated memory is still 94.4MB. Free memory was 72.0MB in the beginning and 61.9MB in the end (delta: 10.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 00:21:00,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 67.1MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.08ms. Allocated memory is still 94.4MB. Free memory was 72.0MB in the beginning and 61.9MB in the end (delta: 10.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:21:02,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:21:02,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:21:02,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:21:02,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:21:02,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:21:02,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:21:02,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:21:02,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:21:02,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:21:02,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:21:02,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:21:02,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:21:02,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:21:02,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:21:02,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:21:02,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:21:02,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:21:02,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:21:02,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:21:02,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:21:02,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:21:02,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:21:02,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:21:02,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:21:02,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:21:02,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:21:02,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:21:02,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:21:02,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:21:02,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:21:02,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:21:02,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:21:02,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:21:02,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:21:02,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:21:02,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:21:02,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:21:02,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:21:02,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:21:02,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:21:02,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:21:02,688 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:21:02,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:21:02,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:21:02,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:21:02,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:21:02,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:21:02,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:21:02,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:21:02,692 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:21:02,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:21:02,693 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:21:02,693 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:21:02,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:21:02,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:21:02,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:21:02,694 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:21:02,694 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:21:02,694 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:21:02,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:21:02,695 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:21:02,695 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:21:02,695 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:21:02,695 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:21:02,695 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:21:02,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:21:02,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:21:02,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:21:02,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:21:02,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:21:02,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:21:02,697 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:21:02,697 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:21:02,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:21:02,697 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:21:02,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:21:02,698 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:21:02,698 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:21:02,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:21:02,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:21:03,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:21:03,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:21:03,008 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:21:03,008 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:21:03,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 00:21:04,063 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:21:04,288 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:21:04,289 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 00:21:04,295 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1ba90da/b04c4a0f15ed464f933fdeee026ee3fa/FLAG984a9cbec [2023-08-30 00:21:04,308 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1ba90da/b04c4a0f15ed464f933fdeee026ee3fa [2023-08-30 00:21:04,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:21:04,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:21:04,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:04,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:21:04,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:21:04,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8c64c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04, skipping insertion in model container [2023-08-30 00:21:04,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:21:04,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:21:04,519 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 00:21:04,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:04,548 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:21:04,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:21:04,585 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 00:21:04,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:04,601 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:21:04,636 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 00:21:04,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:04,668 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:21:04,670 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:21:04,675 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:21:04,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04 WrapperNode [2023-08-30 00:21:04,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:04,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:21:04,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:21:04,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:21:04,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,740 INFO L138 Inliner]: procedures = 29, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 301 [2023-08-30 00:21:04,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:21:04,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:21:04,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:21:04,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:21:04,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:21:04,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:21:04,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:21:04,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:21:04,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (1/1) ... [2023-08-30 00:21:04,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:21:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:21:04,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:21:04,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:21:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:21:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:21:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:21:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:21:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:21:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:21:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:21:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:21:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:21:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:21:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:21:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:21:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:21:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:21:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:21:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:21:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:21:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:21:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:21:04,880 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:21:05,009 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:21:05,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:21:05,604 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:21:05,822 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:21:05,822 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 00:21:05,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:21:05 BoogieIcfgContainer [2023-08-30 00:21:05,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:21:05,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:21:05,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:21:05,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:21:05,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:21:04" (1/3) ... [2023-08-30 00:21:05,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7e8fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:21:05, skipping insertion in model container [2023-08-30 00:21:05,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:04" (2/3) ... [2023-08-30 00:21:05,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7e8fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:21:05, skipping insertion in model container [2023-08-30 00:21:05,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:21:05" (3/3) ... [2023-08-30 00:21:05,834 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-08-30 00:21:05,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:21:05,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 00:21:05,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:21:05,954 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:21:05,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 244 transitions, 520 flow [2023-08-30 00:21:06,113 INFO L130 PetriNetUnfolder]: 18/240 cut-off events. [2023-08-30 00:21:06,113 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:21:06,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 240 events. 18/240 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 221 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 190. Up to 2 conditions per place. [2023-08-30 00:21:06,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 244 transitions, 520 flow [2023-08-30 00:21:06,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 236 transitions, 496 flow [2023-08-30 00:21:06,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:21:06,151 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 236 transitions, 496 flow [2023-08-30 00:21:06,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 236 transitions, 496 flow [2023-08-30 00:21:06,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 236 transitions, 496 flow [2023-08-30 00:21:06,211 INFO L130 PetriNetUnfolder]: 18/236 cut-off events. [2023-08-30 00:21:06,212 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:21:06,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 236 events. 18/236 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 217 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 190. Up to 2 conditions per place. [2023-08-30 00:21:06,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-30 00:21:29,068 INFO L134 LiptonReduction]: Checked pairs total: 5098 [2023-08-30 00:21:29,069 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-08-30 00:21:29,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:21:29,087 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;@681801ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:21:29,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-30 00:21:29,091 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:21:29,091 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:21:29,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:29,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:21:29,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:21:29,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:29,099 INFO L85 PathProgramCache]: Analyzing trace with hash 36342, now seen corresponding path program 1 times [2023-08-30 00:21:29,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:29,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860540589] [2023-08-30 00:21:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:29,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:29,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:29,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:29,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:21:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:29,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:21:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:29,420 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:21:29,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:21:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:29,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:29,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860540589] [2023-08-30 00:21:29,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860540589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:29,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:29,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915245021] [2023-08-30 00:21:29,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:29,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:29,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:29,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:21:29,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2023-08-30 00:21:29,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:29,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:29,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2023-08-30 00:21:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:32,234 INFO L130 PetriNetUnfolder]: 15622/19521 cut-off events. [2023-08-30 00:21:32,235 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2023-08-30 00:21:32,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39211 conditions, 19521 events. 15622/19521 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 95764 event pairs, 10109 based on Foata normal form. 0/5199 useless extension candidates. Maximal degree in co-relation 34231. Up to 19216 conditions per place. [2023-08-30 00:21:32,391 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 54 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 00:21:32,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 256 flow [2023-08-30 00:21:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 00:21:32,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529737206085754 [2023-08-30 00:21:32,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 00:21:32,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 00:21:32,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:32,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 00:21:32,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:32,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:32,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:32,420 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 152 flow. Second operand 3 states and 655 transitions. [2023-08-30 00:21:32,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 256 flow [2023-08-30 00:21:32,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:21:32,434 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 132 flow [2023-08-30 00:21:32,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-30 00:21:32,438 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-08-30 00:21:32,438 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 132 flow [2023-08-30 00:21:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:32,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:32,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:21:32,452 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 00:21:32,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:32,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:21:32,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash 36344, now seen corresponding path program 1 times [2023-08-30 00:21:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:32,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514493433] [2023-08-30 00:21:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:32,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:32,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:32,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:32,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:21:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:21:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:32,900 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:21:32,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:21:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:32,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:32,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514493433] [2023-08-30 00:21:32,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514493433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:32,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:32,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:32,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930458037] [2023-08-30 00:21:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:32,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:21:33,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2023-08-30 00:21:33,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:33,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:33,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2023-08-30 00:21:33,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:36,583 INFO L130 PetriNetUnfolder]: 31233/39029 cut-off events. [2023-08-30 00:21:36,584 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:21:36,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77763 conditions, 39029 events. 31233/39029 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 207096 event pairs, 20215 based on Foata normal form. 0/10773 useless extension candidates. Maximal degree in co-relation 77757. Up to 19213 conditions per place. [2023-08-30 00:21:36,795 INFO L137 encePairwiseOnDemand]: 476/482 looper letters, 103 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-08-30 00:21:36,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 113 transitions, 458 flow [2023-08-30 00:21:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 706 transitions. [2023-08-30 00:21:36,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48824343015214383 [2023-08-30 00:21:36,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 706 transitions. [2023-08-30 00:21:36,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 706 transitions. [2023-08-30 00:21:36,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:36,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 706 transitions. [2023-08-30 00:21:36,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:36,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:36,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:36,812 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 132 flow. Second operand 3 states and 706 transitions. [2023-08-30 00:21:36,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 113 transitions, 458 flow [2023-08-30 00:21:36,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 113 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:21:36,816 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 163 flow [2023-08-30 00:21:36,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2023-08-30 00:21:36,818 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-08-30 00:21:36,819 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 163 flow [2023-08-30 00:21:36,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:36,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:36,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:21:36,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:37,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:37,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:21:37,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1129497, now seen corresponding path program 1 times [2023-08-30 00:21:37,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119131863] [2023-08-30 00:21:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:37,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:37,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:37,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:21:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:21:37,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:37,272 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:21:37,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:21:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:37,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:21:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:37,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:37,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119131863] [2023-08-30 00:21:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119131863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:21:37,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:21:37,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:21:37,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25379800] [2023-08-30 00:21:37,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:21:37,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:21:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:37,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:21:37,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:21:38,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 482 [2023-08-30 00:21:38,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 163 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 00:21:38,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:38,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 482 [2023-08-30 00:21:38,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:43,202 INFO L130 PetriNetUnfolder]: 46852/58549 cut-off events. [2023-08-30 00:21:43,202 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:21:43,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116679 conditions, 58549 events. 46852/58549 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3758. Compared 323575 event pairs, 30321 based on Foata normal form. 0/16361 useless extension candidates. Maximal degree in co-relation 116670. Up to 19216 conditions per place. [2023-08-30 00:21:43,712 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 152 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2023-08-30 00:21:43,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 177 transitions, 771 flow [2023-08-30 00:21:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:21:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:21:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1311 transitions. [2023-08-30 00:21:43,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533195020746888 [2023-08-30 00:21:43,721 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1311 transitions. [2023-08-30 00:21:43,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1311 transitions. [2023-08-30 00:21:43,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:43,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1311 transitions. [2023-08-30 00:21:43,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.5) internal successors, (1311), 6 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:43,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:43,734 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:43,735 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 163 flow. Second operand 6 states and 1311 transitions. [2023-08-30 00:21:43,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 177 transitions, 771 flow [2023-08-30 00:21:43,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 177 transitions, 757 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:21:43,743 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 300 flow [2023-08-30 00:21:43,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-30 00:21:43,744 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2023-08-30 00:21:43,744 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 300 flow [2023-08-30 00:21:43,745 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 00:21:43,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:43,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:21:43,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:43,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:43,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:21:43,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1130994, now seen corresponding path program 1 times [2023-08-30 00:21:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382579865] [2023-08-30 00:21:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:43,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:43,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:43,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:21:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:44,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:21:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:44,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:44,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:44,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:44,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:44,217 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 00:21:44,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 00:21:44,263 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 00:21:44,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 160 [2023-08-30 00:21:44,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:44,352 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 00:21:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:44,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:44,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382579865] [2023-08-30 00:21:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382579865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:44,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:44,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:21:44,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388842505] [2023-08-30 00:21:44,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:44,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:21:44,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:21:44,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:21:44,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 482 [2023-08-30 00:21:44,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:44,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:44,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 482 [2023-08-30 00:21:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:48,054 INFO L130 PetriNetUnfolder]: 37870/47689 cut-off events. [2023-08-30 00:21:48,054 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 00:21:48,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95009 conditions, 47689 events. 37870/47689 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 263438 event pairs, 24327 based on Foata normal form. 0/13735 useless extension candidates. Maximal degree in co-relation 94996. Up to 46774 conditions per place. [2023-08-30 00:21:48,358 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 68 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-30 00:21:48,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 418 flow [2023-08-30 00:21:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2023-08-30 00:21:48,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612724757952974 [2023-08-30 00:21:48,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2023-08-30 00:21:48,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2023-08-30 00:21:48,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:48,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2023-08-30 00:21:48,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:48,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:48,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:48,366 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 300 flow. Second operand 3 states and 667 transitions. [2023-08-30 00:21:48,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 418 flow [2023-08-30 00:21:48,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 399 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:21:48,369 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 263 flow [2023-08-30 00:21:48,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-30 00:21:48,370 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-30 00:21:48,370 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 263 flow [2023-08-30 00:21:48,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:48,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:48,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:21:48,381 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 00:21:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:48,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:21:48,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1130993, now seen corresponding path program 1 times [2023-08-30 00:21:48,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:48,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251929897] [2023-08-30 00:21:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:48,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:48,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:48,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:21:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:21:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:48,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:48,797 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 00:21:48,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 00:21:49,663 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-08-30 00:21:49,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 00:21:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:50,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:50,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:50,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251929897] [2023-08-30 00:21:50,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251929897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:50,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:50,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:50,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215683756] [2023-08-30 00:21:50,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:50,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:50,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:50,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:21:50,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 00:21:50,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:50,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:50,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 00:21:50,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:53,353 INFO L130 PetriNetUnfolder]: 28868/36809 cut-off events. [2023-08-30 00:21:53,354 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:21:53,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73230 conditions, 36809 events. 28868/36809 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2154. Compared 203632 event pairs, 18327 based on Foata normal form. 0/11860 useless extension candidates. Maximal degree in co-relation 73216. Up to 35894 conditions per place. [2023-08-30 00:21:53,557 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 00:21:53,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 373 flow [2023-08-30 00:21:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-30 00:21:53,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557399723374827 [2023-08-30 00:21:53,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-30 00:21:53,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-30 00:21:53,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:53,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-30 00:21:53,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:53,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:53,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:53,565 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 263 flow. Second operand 3 states and 659 transitions. [2023-08-30 00:21:53,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 373 flow [2023-08-30 00:21:53,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:21:53,568 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 244 flow [2023-08-30 00:21:53,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-30 00:21:53,569 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-08-30 00:21:53,569 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 244 flow [2023-08-30 00:21:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:53,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:53,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:21:53,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:53,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:53,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:21:53,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1086914067, now seen corresponding path program 1 times [2023-08-30 00:21:53,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:53,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806647130] [2023-08-30 00:21:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:53,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:53,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:53,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:53,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:21:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:53,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:21:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:53,999 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 00:21:54,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 00:21:54,025 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:21:54,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 00:21:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:54,078 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 00:21:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:54,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:54,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806647130] [2023-08-30 00:21:54,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806647130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:54,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:54,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:21:54,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996080278] [2023-08-30 00:21:54,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:54,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:21:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:21:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:21:54,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 482 [2023-08-30 00:21:54,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:54,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:54,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 482 [2023-08-30 00:21:54,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:56,706 INFO L130 PetriNetUnfolder]: 27647/35198 cut-off events. [2023-08-30 00:21:56,706 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:21:56,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70009 conditions, 35198 events. 27647/35198 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 192823 event pairs, 17418 based on Foata normal form. 0/11557 useless extension candidates. Maximal degree in co-relation 69994. Up to 34283 conditions per place. [2023-08-30 00:21:56,854 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-30 00:21:56,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 366 flow [2023-08-30 00:21:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2023-08-30 00:21:56,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45850622406639 [2023-08-30 00:21:56,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2023-08-30 00:21:56,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2023-08-30 00:21:56,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:56,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2023-08-30 00:21:56,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:56,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:56,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:56,862 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 244 flow. Second operand 3 states and 663 transitions. [2023-08-30 00:21:56,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 366 flow [2023-08-30 00:21:56,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:21:56,864 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 241 flow [2023-08-30 00:21:56,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-30 00:21:56,865 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-30 00:21:56,865 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 241 flow [2023-08-30 00:21:56,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:56,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:56,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:21:56,877 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 (7)] Ended with exit code 0 [2023-08-30 00:21:57,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:57,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:21:57,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1086914066, now seen corresponding path program 1 times [2023-08-30 00:21:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:57,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527910247] [2023-08-30 00:21:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:57,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:57,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:57,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:57,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:21:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:57,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:21:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:57,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:57,257 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 00:21:57,257 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 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 00:21:57,526 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 00:21:57,526 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 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 00:21:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:57,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:57,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527910247] [2023-08-30 00:21:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527910247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:57,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:57,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:57,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539546035] [2023-08-30 00:21:57,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:57,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:57,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:57,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:21:57,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 00:21:57,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:57,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:57,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 00:21:57,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:59,957 INFO L130 PetriNetUnfolder]: 26426/33587 cut-off events. [2023-08-30 00:21:59,957 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 00:22:00,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66788 conditions, 33587 events. 26426/33587 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 182382 event pairs, 16509 based on Foata normal form. 0/11254 useless extension candidates. Maximal degree in co-relation 66772. Up to 32672 conditions per place. [2023-08-30 00:22:00,182 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 00:22:00,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 359 flow [2023-08-30 00:22:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:22:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:22:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 00:22:00,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529737206085754 [2023-08-30 00:22:00,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 00:22:00,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 00:22:00,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:00,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 00:22:00,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:00,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:00,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:00,189 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 241 flow. Second operand 3 states and 655 transitions. [2023-08-30 00:22:00,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 359 flow [2023-08-30 00:22:00,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:22:00,191 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2023-08-30 00:22:00,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-30 00:22:00,192 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-30 00:22:00,192 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2023-08-30 00:22:00,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:00,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:00,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:22:00,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:22:00,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:00,402 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:22:00,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash -665408690, now seen corresponding path program 1 times [2023-08-30 00:22:00,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:00,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099316148] [2023-08-30 00:22:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:00,403 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 00:22:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:00,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:00,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:22:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:00,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:22:00,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:22:00,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:22:00,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:00,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099316148] [2023-08-30 00:22:00,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099316148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:22:00,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:22:00,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:22:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585063600] [2023-08-30 00:22:00,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:22:00,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:22:00,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:22:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:22:00,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 482 [2023-08-30 00:22:00,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 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 00:22:00,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:00,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 482 [2023-08-30 00:22:00,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:03,437 INFO L130 PetriNetUnfolder]: 30118/38839 cut-off events. [2023-08-30 00:22:03,437 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 00:22:03,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77254 conditions, 38839 events. 30118/38839 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 2251. Compared 221197 event pairs, 19170 based on Foata normal form. 0/14445 useless extension candidates. Maximal degree in co-relation 77237. Up to 32638 conditions per place. [2023-08-30 00:22:03,652 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 101 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-08-30 00:22:03,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 580 flow [2023-08-30 00:22:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:22:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:22:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 896 transitions. [2023-08-30 00:22:03,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46473029045643155 [2023-08-30 00:22:03,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 896 transitions. [2023-08-30 00:22:03,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 896 transitions. [2023-08-30 00:22:03,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:03,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 896 transitions. [2023-08-30 00:22:03,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:03,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:03,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:03,658 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 4 states and 896 transitions. [2023-08-30 00:22:03,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 580 flow [2023-08-30 00:22:03,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 579 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:22:03,660 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 256 flow [2023-08-30 00:22:03,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-08-30 00:22:03,661 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-30 00:22:03,661 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 256 flow [2023-08-30 00:22:03,662 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 00:22:03,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:03,662 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:22:03,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:22:03,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:03,871 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:22:03,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -708080072, now seen corresponding path program 2 times [2023-08-30 00:22:03,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:03,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544778573] [2023-08-30 00:22:03,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:22:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:03,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:03,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:03,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:22:03,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:22:03,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:22:03,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:22:03,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:04,077 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:22:04,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:22:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:22:04,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:22:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:22:04,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:04,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544778573] [2023-08-30 00:22:04,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544778573] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:22:04,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:22:04,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:22:04,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250984801] [2023-08-30 00:22:04,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:22:04,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:22:04,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:22:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:22:08,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 482 [2023-08-30 00:22:08,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 256 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:08,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:08,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 482 [2023-08-30 00:22:08,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:09,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:22:11,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:22:15,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:22:16,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:22:18,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:22:32,321 INFO L130 PetriNetUnfolder]: 100474/129520 cut-off events. [2023-08-30 00:22:32,321 INFO L131 PetriNetUnfolder]: For 11219/11219 co-relation queries the response was YES. [2023-08-30 00:22:32,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292372 conditions, 129520 events. 100474/129520 cut-off events. For 11219/11219 co-relation queries the response was YES. Maximal size of possible extension queue 5467. Compared 818740 event pairs, 63930 based on Foata normal form. 18/59823 useless extension candidates. Maximal degree in co-relation 292353. Up to 34861 conditions per place. [2023-08-30 00:22:33,130 INFO L137 encePairwiseOnDemand]: 475/482 looper letters, 415 selfloop transitions, 32 changer transitions 0/453 dead transitions. [2023-08-30 00:22:33,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 453 transitions, 2206 flow [2023-08-30 00:22:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:22:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:22:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2751 transitions. [2023-08-30 00:22:33,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756224066390041 [2023-08-30 00:22:33,137 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2751 transitions. [2023-08-30 00:22:33,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2751 transitions. [2023-08-30 00:22:33,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:33,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2751 transitions. [2023-08-30 00:22:33,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.25) internal successors, (2751), 12 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:33,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:33,150 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:33,151 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 256 flow. Second operand 12 states and 2751 transitions. [2023-08-30 00:22:33,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 453 transitions, 2206 flow [2023-08-30 00:22:33,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 453 transitions, 2200 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:22:33,162 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 494 flow [2023-08-30 00:22:33,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=494, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-30 00:22:33,163 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-08-30 00:22:33,163 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 494 flow [2023-08-30 00:22:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:33,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:33,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:33,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-30 00:22:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:33,374 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:22:33,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 847394181, now seen corresponding path program 1 times [2023-08-30 00:22:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364227994] [2023-08-30 00:22:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:33,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:33,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:33,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:22:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:22:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:33,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:33,569 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-08-30 00:22:33,570 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 5 case distinctions, treesize of input 36 treesize of output 63 [2023-08-30 00:22:33,982 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2023-08-30 00:22:33,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 00:22:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:22:34,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:22:34,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:34,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364227994] [2023-08-30 00:22:34,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364227994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:22:34,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:22:34,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:22:34,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567735614] [2023-08-30 00:22:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:22:34,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:22:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:22:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:22:34,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 00:22:34,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:34,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:34,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 00:22:34,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:45,544 INFO L130 PetriNetUnfolder]: 98994/127340 cut-off events. [2023-08-30 00:22:45,545 INFO L131 PetriNetUnfolder]: For 11232/11232 co-relation queries the response was YES. [2023-08-30 00:22:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287669 conditions, 127340 events. 98994/127340 cut-off events. For 11232/11232 co-relation queries the response was YES. Maximal size of possible extension queue 5078. Compared 799636 event pairs, 62930 based on Foata normal form. 0/57869 useless extension candidates. Maximal degree in co-relation 287642. Up to 123760 conditions per place. [2023-08-30 00:22:46,653 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 00:22:46,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 646 flow [2023-08-30 00:22:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:22:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:22:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-08-30 00:22:46,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4515905947441217 [2023-08-30 00:22:46,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-08-30 00:22:46,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-08-30 00:22:46,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:46,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-08-30 00:22:46,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:46,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:46,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:46,660 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 494 flow. Second operand 3 states and 653 transitions. [2023-08-30 00:22:46,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 646 flow [2023-08-30 00:22:46,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 587 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 00:22:46,669 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 433 flow [2023-08-30 00:22:46,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=433, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-30 00:22:46,670 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2023-08-30 00:22:46,670 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 433 flow [2023-08-30 00:22:46,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:46,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:46,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:46,682 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 00:22:46,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:46,881 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:22:46,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash -432971537, now seen corresponding path program 1 times [2023-08-30 00:22:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:46,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280387585] [2023-08-30 00:22:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:46,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:46,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:46,883 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:46,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:22:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:22:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:47,084 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:22:47,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:22:47,106 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:22:47,107 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 00:22:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:22:47,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:22:47,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:47,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280387585] [2023-08-30 00:22:47,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280387585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:22:47,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:22:47,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:22:47,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257714836] [2023-08-30 00:22:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:22:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:22:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:22:47,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:22:47,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 482 [2023-08-30 00:22:47,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 433 flow. Second operand has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:47,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:47,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 482 [2023-08-30 00:22:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:55,017 INFO L130 PetriNetUnfolder]: 67784/88510 cut-off events. [2023-08-30 00:22:55,018 INFO L131 PetriNetUnfolder]: For 9251/9251 co-relation queries the response was YES. [2023-08-30 00:22:55,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194784 conditions, 88510 events. 67784/88510 cut-off events. For 9251/9251 co-relation queries the response was YES. Maximal size of possible extension queue 3628. Compared 559432 event pairs, 43510 based on Foata normal form. 0/45450 useless extension candidates. Maximal degree in co-relation 194756. Up to 85927 conditions per place. [2023-08-30 00:22:55,891 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 64 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2023-08-30 00:22:55,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 82 transitions, 577 flow [2023-08-30 00:22:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:22:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:22:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 833 transitions. [2023-08-30 00:22:55,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320539419087137 [2023-08-30 00:22:55,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 833 transitions. [2023-08-30 00:22:55,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 833 transitions. [2023-08-30 00:22:55,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:55,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 833 transitions. [2023-08-30 00:22:55,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:55,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:55,899 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:55,899 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 433 flow. Second operand 4 states and 833 transitions. [2023-08-30 00:22:55,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 82 transitions, 577 flow [2023-08-30 00:22:55,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:22:55,910 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 448 flow [2023-08-30 00:22:55,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=448, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-08-30 00:22:55,911 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2023-08-30 00:22:55,911 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 448 flow [2023-08-30 00:22:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:55,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:55,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:55,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:22:56,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:56,121 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:22:56,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash -432971536, now seen corresponding path program 1 times [2023-08-30 00:22:56,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:56,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484629654] [2023-08-30 00:22:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:56,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:56,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:56,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:22:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:22:56,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:56,362 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:22:56,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:22:56,501 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:22:56,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:22:56,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:56,631 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 00:22:56,638 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:22:56,638 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 00:22:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:22:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:01,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:01,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484629654] [2023-08-30 00:23:01,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484629654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:01,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:23:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113281931] [2023-08-30 00:23:01,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:01,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:23:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:23:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:23:05,215 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 [1] [2023-08-30 00:23:13,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 482 [2023-08-30 00:23:13,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 448 flow. Second operand has 8 states, 8 states have (on average 180.5) internal successors, (1444), 8 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:13,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:13,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 482 [2023-08-30 00:23:13,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:19,732 WARN L222 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:23:57,050 INFO L130 PetriNetUnfolder]: 130276/170206 cut-off events. [2023-08-30 00:23:57,050 INFO L131 PetriNetUnfolder]: For 23652/23652 co-relation queries the response was YES. [2023-08-30 00:23:57,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371620 conditions, 170206 events. 130276/170206 cut-off events. For 23652/23652 co-relation queries the response was YES. Maximal size of possible extension queue 6323. Compared 1140097 event pairs, 82770 based on Foata normal form. 0/98004 useless extension candidates. Maximal degree in co-relation 371591. Up to 69271 conditions per place. [2023-08-30 00:23:58,427 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 217 selfloop transitions, 31 changer transitions 0/254 dead transitions. [2023-08-30 00:23:58,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 254 transitions, 1550 flow [2023-08-30 00:23:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:23:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:23:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2890 transitions. [2023-08-30 00:23:58,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997233748271093 [2023-08-30 00:23:58,434 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2890 transitions. [2023-08-30 00:23:58,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2890 transitions. [2023-08-30 00:23:58,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:58,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2890 transitions. [2023-08-30 00:23:58,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 192.66666666666666) internal successors, (2890), 15 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:58,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 482.0) internal successors, (7712), 16 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:58,447 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 482.0) internal successors, (7712), 16 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:58,447 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 448 flow. Second operand 15 states and 2890 transitions. [2023-08-30 00:23:58,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 254 transitions, 1550 flow [2023-08-30 00:23:58,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 254 transitions, 1537 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:58,462 INFO L231 Difference]: Finished difference. Result has 102 places, 100 transitions, 689 flow [2023-08-30 00:23:58,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=689, PETRI_PLACES=102, PETRI_TRANSITIONS=100} [2023-08-30 00:23:58,463 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2023-08-30 00:23:58,463 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 100 transitions, 689 flow [2023-08-30 00:23:58,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.5) internal successors, (1444), 8 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:58,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:58,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:23:58,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:58,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:58,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:23:58,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash 847394182, now seen corresponding path program 1 times [2023-08-30 00:23:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78970752] [2023-08-30 00:23:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:58,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:58,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:23:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:23:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:58,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:59,127 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2023-08-30 00:23:59,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 53 [2023-08-30 00:23:59,152 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 120 treesize of output 116 [2023-08-30 00:23:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:59,231 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 00:23:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:59,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:59,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:59,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78970752] [2023-08-30 00:23:59,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78970752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:59,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:59,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:59,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273210226] [2023-08-30 00:23:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:59,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 482 [2023-08-30 00:23:59,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 100 transitions, 689 flow. Second operand has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:59,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 482 [2023-08-30 00:23:59,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:15,550 INFO L130 PetriNetUnfolder]: 127926/166656 cut-off events. [2023-08-30 00:24:15,551 INFO L131 PetriNetUnfolder]: For 113811/113811 co-relation queries the response was YES. [2023-08-30 00:24:16,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391711 conditions, 166656 events. 127926/166656 cut-off events. For 113811/113811 co-relation queries the response was YES. Maximal size of possible extension queue 6523. Compared 1111278 event pairs, 81140 based on Foata normal form. 0/103986 useless extension candidates. Maximal degree in co-relation 391676. Up to 161626 conditions per place. [2023-08-30 00:24:17,135 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 91 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2023-08-30 00:24:17,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 869 flow [2023-08-30 00:24:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:24:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:24:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 00:24:17,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529737206085754 [2023-08-30 00:24:17,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 00:24:17,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 00:24:17,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:17,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 00:24:17,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:17,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:17,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:17,140 INFO L175 Difference]: Start difference. First operand has 102 places, 100 transitions, 689 flow. Second operand 3 states and 655 transitions. [2023-08-30 00:24:17,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 869 flow [2023-08-30 00:24:17,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 98 transitions, 848 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:17,213 INFO L231 Difference]: Finished difference. Result has 101 places, 98 transitions, 666 flow [2023-08-30 00:24:17,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=101, PETRI_TRANSITIONS=98} [2023-08-30 00:24:17,214 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2023-08-30 00:24:17,214 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 98 transitions, 666 flow [2023-08-30 00:24:17,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:17,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:17,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:17,221 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 (14)] Ended with exit code 0 [2023-08-30 00:24:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:17,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:24:17,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash 499409367, now seen corresponding path program 1 times [2023-08-30 00:24:17,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:17,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751520552] [2023-08-30 00:24:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:17,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:17,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:17,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:17,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:24:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:24:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:17,504 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 00:24:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:17,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:17,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:17,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751520552] [2023-08-30 00:24:17,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751520552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:17,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:17,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:24:17,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18215745] [2023-08-30 00:24:17,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:17,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:17,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:17,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:17,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 482 [2023-08-30 00:24:17,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 98 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:17,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:17,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 482 [2023-08-30 00:24:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:29,070 INFO L130 PetriNetUnfolder]: 84416/111486 cut-off events. [2023-08-30 00:24:29,071 INFO L131 PetriNetUnfolder]: For 78139/78139 co-relation queries the response was YES. [2023-08-30 00:24:29,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263003 conditions, 111486 events. 84416/111486 cut-off events. For 78139/78139 co-relation queries the response was YES. Maximal size of possible extension queue 4452. Compared 738199 event pairs, 53200 based on Foata normal form. 0/74866 useless extension candidates. Maximal degree in co-relation 262967. Up to 107364 conditions per place. [2023-08-30 00:24:30,006 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 73 selfloop transitions, 17 changer transitions 0/96 dead transitions. [2023-08-30 00:24:30,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 842 flow [2023-08-30 00:24:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2023-08-30 00:24:30,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299792531120332 [2023-08-30 00:24:30,008 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2023-08-30 00:24:30,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2023-08-30 00:24:30,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:30,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2023-08-30 00:24:30,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:30,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:30,012 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:30,012 INFO L175 Difference]: Start difference. First operand has 101 places, 98 transitions, 666 flow. Second operand 4 states and 829 transitions. [2023-08-30 00:24:30,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 842 flow [2023-08-30 00:24:30,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 96 transitions, 841 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:30,051 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 695 flow [2023-08-30 00:24:30,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=695, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2023-08-30 00:24:30,051 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2023-08-30 00:24:30,051 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 695 flow [2023-08-30 00:24:30,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:30,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:30,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:30,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:30,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:30,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:24:30,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash 499409368, now seen corresponding path program 1 times [2023-08-30 00:24:30,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:30,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958009986] [2023-08-30 00:24:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:30,262 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 00:24:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:30,263 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 00:24:30,264 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 00:24:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:30,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:24:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:30,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:30,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:30,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958009986] [2023-08-30 00:24:30,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958009986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:30,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:30,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:24:30,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355634540] [2023-08-30 00:24:30,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:30,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:30,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:30,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 482 [2023-08-30 00:24:30,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 695 flow. Second operand has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:30,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:30,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 482 [2023-08-30 00:24:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:41,011 INFO L130 PetriNetUnfolder]: 77859/103206 cut-off events. [2023-08-30 00:24:41,011 INFO L131 PetriNetUnfolder]: For 73102/73102 co-relation queries the response was YES. [2023-08-30 00:24:41,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243919 conditions, 103206 events. 77859/103206 cut-off events. For 73102/73102 co-relation queries the response was YES. Maximal size of possible extension queue 4216. Compared 685157 event pairs, 49321 based on Foata normal form. 0/71436 useless extension candidates. Maximal degree in co-relation 243882. Up to 96690 conditions per place. [2023-08-30 00:24:41,988 INFO L137 encePairwiseOnDemand]: 475/482 looper letters, 102 selfloop transitions, 18 changer transitions 0/126 dead transitions. [2023-08-30 00:24:41,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 126 transitions, 1040 flow [2023-08-30 00:24:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 877 transitions. [2023-08-30 00:24:41,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45487551867219916 [2023-08-30 00:24:41,990 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 877 transitions. [2023-08-30 00:24:41,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 877 transitions. [2023-08-30 00:24:41,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:41,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 877 transitions. [2023-08-30 00:24:41,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:41,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:41,994 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:41,994 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 695 flow. Second operand 4 states and 877 transitions. [2023-08-30 00:24:41,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 126 transitions, 1040 flow [2023-08-30 00:24:42,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 126 transitions, 1020 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:42,022 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 766 flow [2023-08-30 00:24:42,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=766, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2023-08-30 00:24:42,023 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2023-08-30 00:24:42,023 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 766 flow [2023-08-30 00:24:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:42,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:42,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:42,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:42,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:42,224 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:24:42,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 652409993, now seen corresponding path program 1 times [2023-08-30 00:24:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932097073] [2023-08-30 00:24:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:42,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:42,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:42,226 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:42,229 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 (17)] Waiting until timeout for monitored process [2023-08-30 00:24:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:42,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:24:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:42,366 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 00:24:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:42,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:43,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:43,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932097073] [2023-08-30 00:24:43,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932097073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:43,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:43,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 00:24:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009671858] [2023-08-30 00:24:43,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:24:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:24:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:24:47,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 482 [2023-08-30 00:24:47,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 766 flow. Second operand has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:47,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:47,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 482 [2023-08-30 00:24:47,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:59,138 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 [1] [2023-08-30 00:25:00,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:25:06,751 INFO L130 PetriNetUnfolder]: 67386/89835 cut-off events. [2023-08-30 00:25:06,751 INFO L131 PetriNetUnfolder]: For 76352/76352 co-relation queries the response was YES. [2023-08-30 00:25:07,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235567 conditions, 89835 events. 67386/89835 cut-off events. For 76352/76352 co-relation queries the response was YES. Maximal size of possible extension queue 3646. Compared 595497 event pairs, 42631 based on Foata normal form. 0/77313 useless extension candidates. Maximal degree in co-relation 235529. Up to 64465 conditions per place. [2023-08-30 00:25:07,684 INFO L137 encePairwiseOnDemand]: 475/482 looper letters, 145 selfloop transitions, 37 changer transitions 0/188 dead transitions. [2023-08-30 00:25:07,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 188 transitions, 1421 flow [2023-08-30 00:25:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:25:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:25:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1804 transitions. [2023-08-30 00:25:07,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158598432457354 [2023-08-30 00:25:07,689 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1804 transitions. [2023-08-30 00:25:07,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1804 transitions. [2023-08-30 00:25:07,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:07,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1804 transitions. [2023-08-30 00:25:07,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.44444444444446) internal successors, (1804), 9 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:07,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:07,695 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:07,695 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 766 flow. Second operand 9 states and 1804 transitions. [2023-08-30 00:25:07,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 188 transitions, 1421 flow [2023-08-30 00:25:07,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 188 transitions, 1378 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 00:25:07,746 INFO L231 Difference]: Finished difference. Result has 112 places, 100 transitions, 838 flow [2023-08-30 00:25:07,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=838, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2023-08-30 00:25:07,747 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2023-08-30 00:25:07,747 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 838 flow [2023-08-30 00:25:07,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:07,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:07,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:25:07,758 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 00:25:07,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:07,957 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:25:07,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1697951334, now seen corresponding path program 1 times [2023-08-30 00:25:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:07,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031283709] [2023-08-30 00:25:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:07,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:07,959 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:07,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:25:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:08,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:25:08,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:08,302 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 00:25:08,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 55 [2023-08-30 00:25:08,349 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:25:08,350 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 00:25:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:08,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:08,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:08,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031283709] [2023-08-30 00:25:08,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031283709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:08,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:08,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:25:08,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142221206] [2023-08-30 00:25:08,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:25:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:25:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:25:08,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 482 [2023-08-30 00:25:08,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 838 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:08,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:08,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 482 [2023-08-30 00:25:08,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:17,591 INFO L130 PetriNetUnfolder]: 62674/83545 cut-off events. [2023-08-30 00:25:17,591 INFO L131 PetriNetUnfolder]: For 115912/115912 co-relation queries the response was YES. [2023-08-30 00:25:18,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237318 conditions, 83545 events. 62674/83545 cut-off events. For 115912/115912 co-relation queries the response was YES. Maximal size of possible extension queue 3421. Compared 552108 event pairs, 39761 based on Foata normal form. 0/78499 useless extension candidates. Maximal degree in co-relation 237279. Up to 80259 conditions per place. [2023-08-30 00:25:18,441 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 91 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2023-08-30 00:25:18,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 98 transitions, 1018 flow [2023-08-30 00:25:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-30 00:25:18,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44190871369294604 [2023-08-30 00:25:18,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-30 00:25:18,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-30 00:25:18,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:18,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-30 00:25:18,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:18,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:18,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:18,445 INFO L175 Difference]: Start difference. First operand has 112 places, 100 transitions, 838 flow. Second operand 3 states and 639 transitions. [2023-08-30 00:25:18,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 98 transitions, 1018 flow [2023-08-30 00:25:18,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 98 transitions, 910 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-30 00:25:18,585 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 728 flow [2023-08-30 00:25:18,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=728, PETRI_PLACES=107, PETRI_TRANSITIONS=98} [2023-08-30 00:25:18,586 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2023-08-30 00:25:18,586 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 728 flow [2023-08-30 00:25:18,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:18,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:18,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:25:18,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:18,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:18,796 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 00:25:18,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1697951336, now seen corresponding path program 1 times [2023-08-30 00:25:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:18,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183521844] [2023-08-30 00:25:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:18,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:18,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:18,801 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:18,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:25:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:25:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:18,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:19,101 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 00:25:19,101 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 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-30 00:25:19,113 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 22 treesize of output 20 [2023-08-30 00:25:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:19,153 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 00:25:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:19,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:19,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183521844] [2023-08-30 00:25:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183521844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:19,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:19,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:25:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464210147] [2023-08-30 00:25:19,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:19,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:25:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:25:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:25:19,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 00:25:19,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 98 transitions, 728 flow. Second operand has 4 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:19,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:19,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 00:25:19,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand