./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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 ../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -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 d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:10:21,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:10:21,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:10:21,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:10:21,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:10:21,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:10:21,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:10:21,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:10:21,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:10:21,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:10:21,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:10:21,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:10:21,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:10:21,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:10:21,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:10:21,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:10:21,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:10:21,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:10:21,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:10:21,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:10:21,510 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:10:21,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:10:21,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:10:21,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:10:21,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:10:21,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:10:21,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:10:21,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:10:21,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:10:21,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:10:21,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:10:21,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:10:21,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:10:21,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:10:21,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:10:21,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:10:21,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:10:21,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:10:21,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:10:21,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:10:21,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:10:21,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:10:21,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:10:21,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:10:21,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:10:21,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:10:21,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:10:21,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:10:21,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:10:21,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:10:21,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:10:21,544 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:10:21,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:10:21,545 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:10:21,545 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:10:21,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:10:21,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:10:21,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:10:21,546 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:10:21,546 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:10:21,546 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:10:21,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:10:21,547 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:10:21,547 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:10:21,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:10:21,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:10:21,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:10:21,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:10:21,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:10:21,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:10:21,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:10:21,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:10:21,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:10:21,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2022-07-23 06:10:21,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:10:21,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:10:21,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:10:21,826 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:10:21,826 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:10:21,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2022-07-23 06:10:21,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1cf1888/eb8d0cd844014049b3bf61f963ff1fb7/FLAG14761998e [2022-07-23 06:10:22,371 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:10:22,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2022-07-23 06:10:22,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1cf1888/eb8d0cd844014049b3bf61f963ff1fb7/FLAG14761998e [2022-07-23 06:10:22,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1cf1888/eb8d0cd844014049b3bf61f963ff1fb7 [2022-07-23 06:10:22,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:10:22,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:10:22,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:10:22,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:10:22,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:10:22,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:10:22" (1/1) ... [2022-07-23 06:10:22,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4468a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:22, skipping insertion in model container [2022-07-23 06:10:22,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:10:22" (1/1) ... [2022-07-23 06:10:22,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:10:22,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:10:23,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:10:23,193 ERROR L326 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) [2022-07-23 06:10:23,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1bce4295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:23, skipping insertion in model container [2022-07-23 06:10:23,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:10:23,196 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 06:10:23,198 INFO L158 Benchmark]: Toolchain (without parser) took 333.72ms. Allocated memory is still 134.2MB. Free memory was 111.1MB in the beginning and 97.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-23 06:10:23,198 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:10:23,199 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.13ms. Allocated memory is still 134.2MB. Free memory was 111.1MB in the beginning and 97.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-23 06:10:23,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 332.13ms. Allocated memory is still 134.2MB. Free memory was 111.1MB in the beginning and 97.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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 ../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -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 d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:10:24,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:10:24,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:10:24,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:10:24,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:10:24,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:10:24,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:10:24,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:10:25,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:10:25,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:10:25,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:10:25,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:10:25,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:10:25,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:10:25,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:10:25,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:10:25,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:10:25,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:10:25,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:10:25,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:10:25,024 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:10:25,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:10:25,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:10:25,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:10:25,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:10:25,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:10:25,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:10:25,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:10:25,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:10:25,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:10:25,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:10:25,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:10:25,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:10:25,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:10:25,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:10:25,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:10:25,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:10:25,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:10:25,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:10:25,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:10:25,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:10:25,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:10:25,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:10:25,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:10:25,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:10:25,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:10:25,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:10:25,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:10:25,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:10:25,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:10:25,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:10:25,073 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:10:25,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:10:25,074 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:10:25,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:10:25,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:10:25,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:10:25,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:10:25,074 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:10:25,075 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:10:25,075 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:10:25,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:10:25,075 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:10:25,075 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:10:25,075 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:10:25,075 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:10:25,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:10:25,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:10:25,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:10:25,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:10:25,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:10:25,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:10:25,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:10:25,077 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:10:25,077 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:10:25,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:10:25,077 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2022-07-23 06:10:25,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:10:25,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:10:25,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:10:25,375 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:10:25,377 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:10:25,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2022-07-23 06:10:25,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a44217a/61d52e15e35e4adeba64e3cd605defef/FLAGf274b3338 [2022-07-23 06:10:25,849 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:10:25,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2022-07-23 06:10:25,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a44217a/61d52e15e35e4adeba64e3cd605defef/FLAGf274b3338 [2022-07-23 06:10:26,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a44217a/61d52e15e35e4adeba64e3cd605defef [2022-07-23 06:10:26,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:10:26,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:10:26,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:10:26,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:10:26,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:10:26,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e884878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26, skipping insertion in model container [2022-07-23 06:10:26,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:10:26,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:10:26,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:10:26,578 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 06:10:26,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:10:26,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:10:26,667 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:10:26,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:10:26,762 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:10:26,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26 WrapperNode [2022-07-23 06:10:26,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:10:26,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:10:26,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:10:26,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:10:26,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,814 INFO L137 Inliner]: procedures = 168, calls = 79, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 55 [2022-07-23 06:10:26,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:10:26,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:10:26,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:10:26,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:10:26,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:10:26,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:10:26,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:10:26,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:10:26,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (1/1) ... [2022-07-23 06:10:26,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:10:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:10:26,880 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) [2022-07-23 06:10:26,885 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 [2022-07-23 06:10:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-23 06:10:26,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-23 06:10:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-23 06:10:26,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-23 06:10:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2022-07-23 06:10:26,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2022-07-23 06:10:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:10:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:10:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:10:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:10:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:10:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:10:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:10:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-07-23 06:10:26,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-07-23 06:10:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:10:26,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:10:26,985 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:10:26,986 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:10:27,210 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:10:27,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:10:27,215 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-23 06:10:27,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:10:27 BoogieIcfgContainer [2022-07-23 06:10:27,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:10:27,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:10:27,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:10:27,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:10:27,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:10:26" (1/3) ... [2022-07-23 06:10:27,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd987c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:10:27, skipping insertion in model container [2022-07-23 06:10:27,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:10:26" (2/3) ... [2022-07-23 06:10:27,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd987c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:10:27, skipping insertion in model container [2022-07-23 06:10:27,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:10:27" (3/3) ... [2022-07-23 06:10:27,222 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test14_2.i [2022-07-23 06:10:27,232 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:10:27,232 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-07-23 06:10:27,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:10:27,281 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@220d0848, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32c71efd [2022-07-23 06:10:27,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-07-23 06:10:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 38 states have (on average 1.763157894736842) internal successors, (67), 64 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 06:10:27,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:27,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:27,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash 225826608, now seen corresponding path program 1 times [2022-07-23 06:10:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:27,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456838572] [2022-07-23 06:10:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:27,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:27,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:10:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:10:27,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:27,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:27,580 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:10:27,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 17 [2022-07-23 06:10:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:27,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:27,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456838572] [2022-07-23 06:10:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456838572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:27,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:27,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:10:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857949887] [2022-07-23 06:10:27,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:27,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:10:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:10:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:10:27,663 INFO L87 Difference]: Start difference. First operand has 72 states, 38 states have (on average 1.763157894736842) internal successors, (67), 64 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:27,944 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-07-23 06:10:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:10:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-23 06:10:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:27,952 INFO L225 Difference]: With dead ends: 73 [2022-07-23 06:10:27,952 INFO L226 Difference]: Without dead ends: 71 [2022-07-23 06:10:27,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:10:27,955 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:27,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 121 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-07-23 06:10:27,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-23 06:10:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-07-23 06:10:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-23 06:10:27,978 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 12 [2022-07-23 06:10:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:27,979 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-23 06:10:27,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-23 06:10:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 06:10:27,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:27,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:27,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-23 06:10:28,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:28,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash 225826609, now seen corresponding path program 1 times [2022-07-23 06:10:28,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:28,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675145587] [2022-07-23 06:10:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:28,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:28,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:28,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:10:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:28,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:10:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:28,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:28,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:30,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:10:30,355 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:30,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 06:10:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:30,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:30,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675145587] [2022-07-23 06:10:30,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675145587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:30,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:30,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:10:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614747260] [2022-07-23 06:10:30,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:30,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:10:30,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:10:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2022-07-23 06:10:30,437 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:34,892 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-07-23 06:10:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:10:34,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-23 06:10:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:34,896 INFO L225 Difference]: With dead ends: 90 [2022-07-23 06:10:34,896 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 06:10:34,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=24, Invalid=63, Unknown=3, NotChecked=0, Total=90 [2022-07-23 06:10:34,897 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 87 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:34,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 155 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 244 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-07-23 06:10:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 06:10:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2022-07-23 06:10:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-07-23 06:10:34,919 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 12 [2022-07-23 06:10:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:34,919 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-07-23 06:10:34,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-07-23 06:10:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:10:34,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:34,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:34,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:35,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:35,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash 838569493, now seen corresponding path program 1 times [2022-07-23 06:10:35,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:35,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935051552] [2022-07-23 06:10:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:35,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:35,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:35,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:10:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:10:35,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:35,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:35,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:35,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935051552] [2022-07-23 06:10:35,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935051552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:35,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:35,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:10:35,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919775695] [2022-07-23 06:10:35,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:35,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:35,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:35,201 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:35,235 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2022-07-23 06:10:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:35,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-23 06:10:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:35,240 INFO L225 Difference]: With dead ends: 93 [2022-07-23 06:10:35,240 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 06:10:35,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:35,241 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 20 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:35,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 330 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:10:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 06:10:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2022-07-23 06:10:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 40 states have (on average 1.625) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-07-23 06:10:35,251 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 11 [2022-07-23 06:10:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:35,252 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-07-23 06:10:35,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-07-23 06:10:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:10:35,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:35,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:35,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:35,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:35,461 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1726073174, now seen corresponding path program 1 times [2022-07-23 06:10:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:35,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597700593] [2022-07-23 06:10:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:35,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:35,469 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:35,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:10:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:10:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:35,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:35,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:35,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:35,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597700593] [2022-07-23 06:10:35,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597700593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:35,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:35,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:10:35,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399908129] [2022-07-23 06:10:35,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:35,607 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:35,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:35,837 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-07-23 06:10:35,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:10:35,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-23 06:10:35,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:35,839 INFO L225 Difference]: With dead ends: 89 [2022-07-23 06:10:35,839 INFO L226 Difference]: Without dead ends: 89 [2022-07-23 06:10:35,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:10:35,840 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 76 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:35,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 85 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:10:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-23 06:10:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2022-07-23 06:10:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 42 states have (on average 1.619047619047619) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:10:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-07-23 06:10:35,845 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 11 [2022-07-23 06:10:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:35,846 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-07-23 06:10:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-07-23 06:10:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:10:35,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:35,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:35,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:36,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:36,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:36,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1726073175, now seen corresponding path program 1 times [2022-07-23 06:10:36,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:36,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61084572] [2022-07-23 06:10:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:36,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:36,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:36,059 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:36,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:10:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:10:36,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:36,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:36,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:36,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61084572] [2022-07-23 06:10:36,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61084572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:36,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:36,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:10:36,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178154995] [2022-07-23 06:10:36,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:36,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:36,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:36,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:36,181 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:36,460 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-07-23 06:10:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:10:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-23 06:10:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:36,462 INFO L225 Difference]: With dead ends: 91 [2022-07-23 06:10:36,462 INFO L226 Difference]: Without dead ends: 91 [2022-07-23 06:10:36,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:10:36,462 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:36,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 100 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:10:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-23 06:10:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2022-07-23 06:10:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 65 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:10:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-07-23 06:10:36,467 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 11 [2022-07-23 06:10:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:36,467 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-07-23 06:10:36,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-07-23 06:10:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 06:10:36,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:36,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:36,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:36,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:36,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:36,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1681752525, now seen corresponding path program 1 times [2022-07-23 06:10:36,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:36,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284361809] [2022-07-23 06:10:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:36,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:36,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:36,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:10:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:10:36,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:36,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:36,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:36,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284361809] [2022-07-23 06:10:36,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284361809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:36,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:36,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 06:10:36,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216055284] [2022-07-23 06:10:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:36,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:10:36,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:10:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:10:36,842 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:37,064 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2022-07-23 06:10:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:10:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-23 06:10:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:37,065 INFO L225 Difference]: With dead ends: 87 [2022-07-23 06:10:37,065 INFO L226 Difference]: Without dead ends: 87 [2022-07-23 06:10:37,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:10:37,066 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 44 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:37,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 319 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-07-23 06:10:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-23 06:10:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2022-07-23 06:10:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:10:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-07-23 06:10:37,070 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 15 [2022-07-23 06:10:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:37,071 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-07-23 06:10:37,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-07-23 06:10:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 06:10:37,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:37,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:37,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:37,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:37,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1681752526, now seen corresponding path program 1 times [2022-07-23 06:10:37,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:37,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161021763] [2022-07-23 06:10:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:37,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:37,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:37,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:37,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:10:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:37,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 06:10:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:37,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:37,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:37,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:10:37,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:10:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:39,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:10:39,538 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:39,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 06:10:39,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:39,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:39,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:39,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:39,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161021763] [2022-07-23 06:10:39,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161021763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:39,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:39,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 06:10:39,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461953580] [2022-07-23 06:10:39,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:39,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:10:39,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:39,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:10:39,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2022-07-23 06:10:39,760 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:40,144 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2022-07-23 06:10:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 06:10:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-23 06:10:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:40,146 INFO L225 Difference]: With dead ends: 91 [2022-07-23 06:10:40,146 INFO L226 Difference]: Without dead ends: 91 [2022-07-23 06:10:40,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2022-07-23 06:10:40,146 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:40,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 344 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 132 Unchecked, 0.3s Time] [2022-07-23 06:10:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-23 06:10:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-07-23 06:10:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.6) internal successors, (80), 72 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-23 06:10:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-07-23 06:10:40,151 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 15 [2022-07-23 06:10:40,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:40,151 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-07-23 06:10:40,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-07-23 06:10:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 06:10:40,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:40,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:40,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:40,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -115198833, now seen corresponding path program 1 times [2022-07-23 06:10:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:40,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114172381] [2022-07-23 06:10:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:40,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:40,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:40,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:40,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 06:10:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:10:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:40,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:40,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114172381] [2022-07-23 06:10:40,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114172381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:40,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:40,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:10:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735657045] [2022-07-23 06:10:40,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:40,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:40,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:40,467 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:40,485 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-07-23 06:10:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-23 06:10:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:40,486 INFO L225 Difference]: With dead ends: 88 [2022-07-23 06:10:40,486 INFO L226 Difference]: Without dead ends: 88 [2022-07-23 06:10:40,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:40,488 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 18 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:40,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 268 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:10:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-23 06:10:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2022-07-23 06:10:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-23 06:10:40,492 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 15 [2022-07-23 06:10:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:40,492 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-23 06:10:40,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-23 06:10:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:10:40,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:40,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:40,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:40,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:40,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash 898943928, now seen corresponding path program 1 times [2022-07-23 06:10:40,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:40,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285143173] [2022-07-23 06:10:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:40,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:40,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:40,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:10:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:10:40,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:40,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:40,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:10:40,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:40,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:40,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:40,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:40,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285143173] [2022-07-23 06:10:40,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285143173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:40,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:40,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:10:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294625837] [2022-07-23 06:10:40,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:40,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:10:40,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:10:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:10:40,932 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:41,207 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2022-07-23 06:10:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:10:41,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-23 06:10:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:41,209 INFO L225 Difference]: With dead ends: 83 [2022-07-23 06:10:41,209 INFO L226 Difference]: Without dead ends: 83 [2022-07-23 06:10:41,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:10:41,209 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 22 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:41,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 227 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-07-23 06:10:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-23 06:10:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-07-23 06:10:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 64 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-07-23 06:10:41,212 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 13 [2022-07-23 06:10:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:41,212 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-07-23 06:10:41,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-07-23 06:10:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:10:41,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:41,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:41,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:41,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:41,420 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash 898943927, now seen corresponding path program 1 times [2022-07-23 06:10:41,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:41,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780271471] [2022-07-23 06:10:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:41,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:41,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:41,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:10:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:10:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:41,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:41,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:10:41,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:41,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:41,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780271471] [2022-07-23 06:10:41,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780271471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:41,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:41,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:10:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105756771] [2022-07-23 06:10:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:10:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:10:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:10:41,586 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:41,793 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-07-23 06:10:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:10:41,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-23 06:10:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:41,794 INFO L225 Difference]: With dead ends: 82 [2022-07-23 06:10:41,794 INFO L226 Difference]: Without dead ends: 82 [2022-07-23 06:10:41,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:10:41,795 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 18 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:41,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 221 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-07-23 06:10:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-23 06:10:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-23 06:10:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.5) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-07-23 06:10:41,798 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 13 [2022-07-23 06:10:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:41,798 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-07-23 06:10:41,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-07-23 06:10:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 06:10:41,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:41,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:41,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:42,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:42,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 594720773, now seen corresponding path program 1 times [2022-07-23 06:10:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:42,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013169162] [2022-07-23 06:10:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:42,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:42,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:10:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:10:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:42,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:42,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:42,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:42,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013169162] [2022-07-23 06:10:42,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013169162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:42,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:42,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 06:10:42,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446250637] [2022-07-23 06:10:42,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:42,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:10:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:10:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:10:42,143 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:42,425 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-07-23 06:10:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:10:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-23 06:10:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:42,426 INFO L225 Difference]: With dead ends: 81 [2022-07-23 06:10:42,426 INFO L226 Difference]: Without dead ends: 81 [2022-07-23 06:10:42,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:10:42,426 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:42,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 307 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:10:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-23 06:10:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-07-23 06:10:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-23 06:10:42,429 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 16 [2022-07-23 06:10:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:42,429 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-23 06:10:42,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-23 06:10:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 06:10:42,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:42,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:42,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:42,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:42,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash 594720774, now seen corresponding path program 1 times [2022-07-23 06:10:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:42,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231955180] [2022-07-23 06:10:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:42,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:42,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:42,639 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:42,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:10:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:10:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:42,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:42,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:42,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:42,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231955180] [2022-07-23 06:10:42,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231955180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:42,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:42,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 06:10:42,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21848339] [2022-07-23 06:10:42,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:42,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:10:42,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:42,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:10:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:10:42,837 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:43,187 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-07-23 06:10:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:10:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-23 06:10:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:43,189 INFO L225 Difference]: With dead ends: 82 [2022-07-23 06:10:43,189 INFO L226 Difference]: Without dead ends: 82 [2022-07-23 06:10:43,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:10:43,189 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 43 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:43,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 392 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:10:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-23 06:10:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2022-07-23 06:10:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-07-23 06:10:43,192 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 16 [2022-07-23 06:10:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:43,192 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-07-23 06:10:43,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-07-23 06:10:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:10:43,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:43,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:43,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:43,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:43,396 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 296014184, now seen corresponding path program 1 times [2022-07-23 06:10:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:43,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942595145] [2022-07-23 06:10:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:43,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:43,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:43,398 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:43,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:10:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:10:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:43,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:43,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942595145] [2022-07-23 06:10:43,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942595145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:43,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:43,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:10:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090171221] [2022-07-23 06:10:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:43,502 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:43,623 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2022-07-23 06:10:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-23 06:10:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:43,624 INFO L225 Difference]: With dead ends: 69 [2022-07-23 06:10:43,624 INFO L226 Difference]: Without dead ends: 69 [2022-07-23 06:10:43,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:10:43,625 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:43,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 153 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:10:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-23 06:10:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-23 06:10:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-23 06:10:43,627 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 18 [2022-07-23 06:10:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:43,627 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-23 06:10:43,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-23 06:10:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:10:43,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:43,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:43,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-23 06:10:43,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:43,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash 296014185, now seen corresponding path program 1 times [2022-07-23 06:10:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:43,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915633494] [2022-07-23 06:10:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:43,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:43,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:43,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:10:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:10:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:44,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:44,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915633494] [2022-07-23 06:10:44,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915633494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:44,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:44,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:10:44,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423765985] [2022-07-23 06:10:44,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:44,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:10:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:10:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:10:44,042 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:44,329 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-07-23 06:10:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:10:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-23 06:10:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:44,331 INFO L225 Difference]: With dead ends: 68 [2022-07-23 06:10:44,331 INFO L226 Difference]: Without dead ends: 68 [2022-07-23 06:10:44,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:10:44,332 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 37 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:44,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 243 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:10:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-23 06:10:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-23 06:10:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 58 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-07-23 06:10:44,334 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 18 [2022-07-23 06:10:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:44,334 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-07-23 06:10:44,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-07-23 06:10:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:10:44,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:44,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:44,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:44,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:44,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash -953601884, now seen corresponding path program 1 times [2022-07-23 06:10:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:44,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906990942] [2022-07-23 06:10:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:44,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:44,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:44,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 06:10:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:44,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:10:44,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:44,684 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:10:44,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 10 [2022-07-23 06:10:44,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:10:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:44,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:44,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906990942] [2022-07-23 06:10:44,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906990942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:44,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:44,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:10:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78882466] [2022-07-23 06:10:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:44,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:10:44,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:44,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:10:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:10:44,742 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:44,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:44,924 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-07-23 06:10:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:10:44,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-23 06:10:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:44,925 INFO L225 Difference]: With dead ends: 74 [2022-07-23 06:10:44,925 INFO L226 Difference]: Without dead ends: 74 [2022-07-23 06:10:44,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:10:44,927 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 18 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:44,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 273 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-07-23 06:10:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-23 06:10:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-07-23 06:10:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:10:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-07-23 06:10:44,930 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 18 [2022-07-23 06:10:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:44,930 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-07-23 06:10:44,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-07-23 06:10:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:10:44,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:44,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:44,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:45,137 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash -953703910, now seen corresponding path program 1 times [2022-07-23 06:10:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287490914] [2022-07-23 06:10:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:45,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:45,140 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:45,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 06:10:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:10:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:45,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:45,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287490914] [2022-07-23 06:10:45,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287490914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:45,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:45,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:10:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330107040] [2022-07-23 06:10:45,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:45,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:45,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:45,291 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:45,386 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-07-23 06:10:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-23 06:10:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:45,388 INFO L225 Difference]: With dead ends: 73 [2022-07-23 06:10:45,388 INFO L226 Difference]: Without dead ends: 60 [2022-07-23 06:10:45,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:45,389 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:45,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-07-23 06:10:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-23 06:10:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-23 06:10:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 51 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-07-23 06:10:45,392 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 18 [2022-07-23 06:10:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:45,392 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-07-23 06:10:45,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:10:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-07-23 06:10:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:10:45,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:45,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:45,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:45,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:45,601 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash 783634007, now seen corresponding path program 1 times [2022-07-23 06:10:45,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:45,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349452578] [2022-07-23 06:10:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:45,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:45,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:45,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:45,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 06:10:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:45,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:10:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:45,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:45,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349452578] [2022-07-23 06:10:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349452578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:45,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:45,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:10:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172568782] [2022-07-23 06:10:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:10:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:10:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:10:45,802 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:45,928 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-07-23 06:10:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:10:45,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-23 06:10:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:45,931 INFO L225 Difference]: With dead ends: 59 [2022-07-23 06:10:45,931 INFO L226 Difference]: Without dead ends: 59 [2022-07-23 06:10:45,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:10:45,932 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 47 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:45,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 170 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-07-23 06:10:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-23 06:10:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-23 06:10:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 50 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-07-23 06:10:45,934 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 25 [2022-07-23 06:10:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:45,934 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-07-23 06:10:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-07-23 06:10:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:10:45,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:45,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:45,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:46,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:46,143 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash 783634008, now seen corresponding path program 1 times [2022-07-23 06:10:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507450295] [2022-07-23 06:10:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:46,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:46,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:46,146 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:46,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 06:10:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:46,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:10:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:46,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:46,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:46,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507450295] [2022-07-23 06:10:46,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507450295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:46,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:46,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:10:46,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713776953] [2022-07-23 06:10:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:46,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:10:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:10:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:10:46,338 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:46,551 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-07-23 06:10:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:10:46,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-23 06:10:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:46,552 INFO L225 Difference]: With dead ends: 58 [2022-07-23 06:10:46,552 INFO L226 Difference]: Without dead ends: 58 [2022-07-23 06:10:46,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:10:46,553 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:46,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 182 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:10:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-23 06:10:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-23 06:10:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 49 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-07-23 06:10:46,554 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 25 [2022-07-23 06:10:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:46,555 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-07-23 06:10:46,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-07-23 06:10:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 06:10:46,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:46,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:46,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:46,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1453003897, now seen corresponding path program 1 times [2022-07-23 06:10:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054459749] [2022-07-23 06:10:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:46,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:46,769 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:46,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:10:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-23 06:10:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:46,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:47,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:47,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:47,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:47,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2022-07-23 06:10:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:47,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:47,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:47,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054459749] [2022-07-23 06:10:47,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054459749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:47,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:47,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-23 06:10:47,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071229291] [2022-07-23 06:10:47,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:47,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:10:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:10:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:10:47,366 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:47,633 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2022-07-23 06:10:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:10:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-07-23 06:10:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:47,635 INFO L225 Difference]: With dead ends: 66 [2022-07-23 06:10:47,635 INFO L226 Difference]: Without dead ends: 66 [2022-07-23 06:10:47,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:10:47,635 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:47,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 278 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-07-23 06:10:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-23 06:10:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-07-23 06:10:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 48 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-07-23 06:10:47,637 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 27 [2022-07-23 06:10:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:47,637 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-07-23 06:10:47,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-07-23 06:10:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 06:10:47,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:47,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:47,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:47,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:47,850 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:47,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1453003896, now seen corresponding path program 1 times [2022-07-23 06:10:47,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:47,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536036699] [2022-07-23 06:10:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:47,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:47,853 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:47,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 06:10:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 06:10:47,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:47,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:48,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:48,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 12 [2022-07-23 06:10:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:48,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:48,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:48,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536036699] [2022-07-23 06:10:48,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536036699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:48,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:48,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-23 06:10:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129103449] [2022-07-23 06:10:48,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:48,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 06:10:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:48,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 06:10:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:10:48,275 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:48,484 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-07-23 06:10:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:10:48,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-07-23 06:10:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:48,485 INFO L225 Difference]: With dead ends: 62 [2022-07-23 06:10:48,485 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 06:10:48,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:10:48,486 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:48,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 235 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-07-23 06:10:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 06:10:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-23 06:10:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 47 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:10:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-07-23 06:10:48,488 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 27 [2022-07-23 06:10:48,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:48,488 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-07-23 06:10:48,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-07-23 06:10:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:10:48,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:48,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:48,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:48,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:48,689 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:48,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2144913277, now seen corresponding path program 1 times [2022-07-23 06:10:48,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:48,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738798576] [2022-07-23 06:10:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:48,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:48,691 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:10:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:48,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 06:10:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:48,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:48,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:49,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 12 [2022-07-23 06:10:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:49,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:49,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738798576] [2022-07-23 06:10:49,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738798576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:49,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:49,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-23 06:10:49,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832576374] [2022-07-23 06:10:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:49,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 06:10:49,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 06:10:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:10:49,162 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:49,468 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2022-07-23 06:10:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 06:10:49,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-07-23 06:10:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:49,469 INFO L225 Difference]: With dead ends: 77 [2022-07-23 06:10:49,470 INFO L226 Difference]: Without dead ends: 77 [2022-07-23 06:10:49,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:10:49,473 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:49,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 291 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 260 Invalid, 0 Unknown, 152 Unchecked, 0.2s Time] [2022-07-23 06:10:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-23 06:10:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-07-23 06:10:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.391304347826087) internal successors, (64), 57 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-07-23 06:10:49,478 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 32 [2022-07-23 06:10:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:49,479 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-07-23 06:10:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-07-23 06:10:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:10:49,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:49,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:49,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:49,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:49,689 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2144913276, now seen corresponding path program 1 times [2022-07-23 06:10:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028691287] [2022-07-23 06:10:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:49,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:49,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:49,691 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:49,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 06:10:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:49,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-23 06:10:49,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:49,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:50,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:50,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:50,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-23 06:10:50,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2022-07-23 06:10:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:50,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:50,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028691287] [2022-07-23 06:10:50,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028691287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:50,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:50,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-23 06:10:50,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694416722] [2022-07-23 06:10:50,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:50,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 06:10:50,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 06:10:50,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:10:50,303 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:50,580 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-07-23 06:10:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 06:10:50,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-07-23 06:10:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:50,581 INFO L225 Difference]: With dead ends: 75 [2022-07-23 06:10:50,581 INFO L226 Difference]: Without dead ends: 75 [2022-07-23 06:10:50,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:10:50,582 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:50,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 263 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-07-23 06:10:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-23 06:10:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-07-23 06:10:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-07-23 06:10:50,583 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 32 [2022-07-23 06:10:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:50,584 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-07-23 06:10:50,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-07-23 06:10:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:10:50,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:50,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:50,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:50,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:50,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2145015303, now seen corresponding path program 1 times [2022-07-23 06:10:50,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:50,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817957345] [2022-07-23 06:10:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:50,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:50,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:50,793 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:50,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 06:10:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 06:10:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:51,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:51,159 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:10:51,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 10 [2022-07-23 06:10:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:51,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:51,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:51,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817957345] [2022-07-23 06:10:51,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817957345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:51,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:51,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-23 06:10:51,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487232318] [2022-07-23 06:10:51,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:51,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 06:10:51,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 06:10:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:10:51,224 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:51,606 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-07-23 06:10:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 06:10:51,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-07-23 06:10:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:51,607 INFO L225 Difference]: With dead ends: 68 [2022-07-23 06:10:51,607 INFO L226 Difference]: Without dead ends: 68 [2022-07-23 06:10:51,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:10:51,608 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:51,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 375 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:10:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-23 06:10:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-23 06:10:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.326086956521739) internal successors, (61), 57 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-23 06:10:51,612 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 32 [2022-07-23 06:10:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:51,613 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-23 06:10:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-23 06:10:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 06:10:51,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:51,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:51,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-23 06:10:51,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:51,818 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1412027647, now seen corresponding path program 1 times [2022-07-23 06:10:51,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:51,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362794260] [2022-07-23 06:10:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:51,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:51,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:51,821 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:51,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:10:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 06:10:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:52,004 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 06:10:52,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 21 [2022-07-23 06:10:52,046 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:10:52,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 19 [2022-07-23 06:10:52,183 INFO L356 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2022-07-23 06:10:52,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 29 [2022-07-23 06:10:52,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:52,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:52,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2022-07-23 06:10:52,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:52,547 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-23 06:10:52,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2022-07-23 06:10:52,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 19 [2022-07-23 06:10:52,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 18 [2022-07-23 06:10:53,251 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 06:10:53,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-23 06:10:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:53,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:53,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362794260] [2022-07-23 06:10:53,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362794260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:53,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:53,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-23 06:10:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664872003] [2022-07-23 06:10:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:53,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 06:10:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 06:10:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:10:53,326 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:53,947 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-07-23 06:10:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 06:10:53,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-07-23 06:10:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:53,948 INFO L225 Difference]: With dead ends: 70 [2022-07-23 06:10:53,948 INFO L226 Difference]: Without dead ends: 70 [2022-07-23 06:10:53,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-07-23 06:10:53,949 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:53,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 348 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 222 Unchecked, 0.3s Time] [2022-07-23 06:10:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-23 06:10:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-07-23 06:10:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-07-23 06:10:53,950 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 35 [2022-07-23 06:10:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:53,951 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-07-23 06:10:53,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-07-23 06:10:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 06:10:53,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:53,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:53,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:54,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:54,152 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_list_delErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1412027648, now seen corresponding path program 1 times [2022-07-23 06:10:54,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:54,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579604327] [2022-07-23 06:10:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:54,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:54,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:54,163 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:54,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 06:10:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-23 06:10:54,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:54,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:54,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:54,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:10:54,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:10:54,533 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:54,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 18 [2022-07-23 06:10:54,552 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:54,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 06:10:54,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:10:54,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:10:54,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:54,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:55,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2022-07-23 06:10:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:55,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2022-07-23 06:10:55,094 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-23 06:10:55,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2022-07-23 06:10:55,138 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-23 06:10:55,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2022-07-23 06:10:55,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 19 [2022-07-23 06:10:55,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 19 [2022-07-23 06:10:56,208 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:10:56,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-07-23 06:10:56,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-07-23 06:10:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:56,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:56,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:56,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579604327] [2022-07-23 06:10:56,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579604327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:56,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:56,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-23 06:10:56,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683143316] [2022-07-23 06:10:56,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 06:10:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 06:10:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:10:56,326 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 23 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:56,674 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-07-23 06:10:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 06:10:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-07-23 06:10:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:56,675 INFO L225 Difference]: With dead ends: 69 [2022-07-23 06:10:56,675 INFO L226 Difference]: Without dead ends: 69 [2022-07-23 06:10:56,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:10:56,675 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:56,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 368 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 274 Unchecked, 0.1s Time] [2022-07-23 06:10:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-23 06:10:56,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-07-23 06:10:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 57 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-07-23 06:10:56,678 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 35 [2022-07-23 06:10:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:56,679 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-07-23 06:10:56,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-07-23 06:10:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:10:56,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:56,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:56,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:56,892 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash 823184137, now seen corresponding path program 1 times [2022-07-23 06:10:56,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:56,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904019442] [2022-07-23 06:10:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:56,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:56,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:56,894 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:56,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 06:10:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-23 06:10:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:57,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:57,098 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:57,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 06:10:57,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-23 06:10:57,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:10:57,347 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-23 06:10:57,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2022-07-23 06:10:57,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 20 [2022-07-23 06:10:57,927 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 06:10:57,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-23 06:10:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:10:58,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:58,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:58,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904019442] [2022-07-23 06:10:58,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904019442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:58,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:58,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-23 06:10:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23086971] [2022-07-23 06:10:58,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:58,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 06:10:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 06:10:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:10:58,031 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:58,650 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-07-23 06:10:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 06:10:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-07-23 06:10:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:58,652 INFO L225 Difference]: With dead ends: 68 [2022-07-23 06:10:58,652 INFO L226 Difference]: Without dead ends: 68 [2022-07-23 06:10:58,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 06:10:58,655 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:58,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 173 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 178 Invalid, 0 Unknown, 211 Unchecked, 0.2s Time] [2022-07-23 06:10:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-23 06:10:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-23 06:10:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 57 states have internal predecessors, (58), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-07-23 06:10:58,660 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 36 [2022-07-23 06:10:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:58,660 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-07-23 06:10:58,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:10:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-07-23 06:10:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:10:58,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:58,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:58,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:58,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:58,871 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:10:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 823184138, now seen corresponding path program 1 times [2022-07-23 06:10:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:58,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616899993] [2022-07-23 06:10:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:58,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:58,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:58,874 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:58,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 06:10:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-23 06:10:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:59,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:59,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:10:59,113 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:59,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 18 [2022-07-23 06:10:59,129 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:59,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 06:10:59,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-23 06:10:59,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-23 06:10:59,408 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-23 06:10:59,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 30 [2022-07-23 06:10:59,449 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-23 06:10:59,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2022-07-23 06:11:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:00,350 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:11:00,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2022-07-23 06:11:00,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2022-07-23 06:11:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:00,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:00,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616899993] [2022-07-23 06:11:00,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616899993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:00,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:00,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-23 06:11:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149110988] [2022-07-23 06:11:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:00,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 06:11:00,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 06:11:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:11:00,471 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:11:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:01,051 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-07-23 06:11:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 06:11:01,052 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-07-23 06:11:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:01,052 INFO L225 Difference]: With dead ends: 67 [2022-07-23 06:11:01,052 INFO L226 Difference]: Without dead ends: 67 [2022-07-23 06:11:01,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-07-23 06:11:01,053 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:01,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 178 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 133 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2022-07-23 06:11:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-23 06:11:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-23 06:11:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 57 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:11:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-07-23 06:11:01,055 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 36 [2022-07-23 06:11:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:01,056 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-07-23 06:11:01,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:11:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-07-23 06:11:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:11:01,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:01,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:01,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:01,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:01,257 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:11:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:01,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1922248378, now seen corresponding path program 1 times [2022-07-23 06:11:01,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:01,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350823095] [2022-07-23 06:11:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:01,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:01,259 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:01,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 06:11:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:11:01,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:01,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-07-23 06:11:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:01,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:01,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350823095] [2022-07-23 06:11:01,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350823095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:01,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:01,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 06:11:01,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118319297] [2022-07-23 06:11:01,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:01,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:11:01,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:11:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:11:01,561 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:02,018 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-07-23 06:11:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:11:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-07-23 06:11:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:02,020 INFO L225 Difference]: With dead ends: 70 [2022-07-23 06:11:02,020 INFO L226 Difference]: Without dead ends: 70 [2022-07-23 06:11:02,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:11:02,020 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:02,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 189 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 06:11:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-23 06:11:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-07-23 06:11:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.25) internal successors, (60), 58 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:11:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-23 06:11:02,023 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 41 [2022-07-23 06:11:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:02,026 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-23 06:11:02,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-23 06:11:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:11:02,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:02,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:02,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:02,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:02,233 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:11:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1922248379, now seen corresponding path program 1 times [2022-07-23 06:11:02,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:02,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820391930] [2022-07-23 06:11:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:02,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:02,236 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:02,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 06:11:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:02,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-23 06:11:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:02,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:11:02,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 [2022-07-23 06:11:02,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:11:02,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-07-23 06:11:02,615 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:02,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 06:11:02,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:11:02,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:11:02,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:11:03,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:11:03,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-23 06:11:03,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:03,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2022-07-23 06:11:03,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:03,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2022-07-23 06:11:03,206 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-23 06:11:03,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2022-07-23 06:11:03,241 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-23 06:11:03,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2022-07-23 06:11:03,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 19 [2022-07-23 06:11:03,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 19 [2022-07-23 06:11:03,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:11:03,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-07-23 06:11:03,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-07-23 06:11:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:04,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:04,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:04,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820391930] [2022-07-23 06:11:04,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820391930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:04,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:04,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-23 06:11:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397912664] [2022-07-23 06:11:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 06:11:04,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 06:11:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:11:04,042 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:11:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:04,334 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-23 06:11:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 06:11:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-07-23 06:11:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:04,335 INFO L225 Difference]: With dead ends: 76 [2022-07-23 06:11:04,335 INFO L226 Difference]: Without dead ends: 76 [2022-07-23 06:11:04,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:11:04,335 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:04,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 363 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 257 Unchecked, 0.1s Time] [2022-07-23 06:11:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-23 06:11:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2022-07-23 06:11:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 58 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:11:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-07-23 06:11:04,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 41 [2022-07-23 06:11:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:04,338 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-07-23 06:11:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:11:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-07-23 06:11:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:11:04,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:04,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:04,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:04,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:04,539 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:11:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash -291334128, now seen corresponding path program 1 times [2022-07-23 06:11:04,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:04,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176243047] [2022-07-23 06:11:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:04,541 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:04,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 06:11:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 06:11:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:04,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-07-23 06:11:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:04,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:04,898 INFO L356 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-07-23 06:11:04,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 17 [2022-07-23 06:11:04,914 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-23 06:11:04,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 15 [2022-07-23 06:11:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:04,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176243047] [2022-07-23 06:11:04,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176243047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:04,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:04,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-07-23 06:11:04,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730339373] [2022-07-23 06:11:04,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:04,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 06:11:04,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 06:11:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:11:04,972 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:05,473 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-07-23 06:11:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 06:11:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-07-23 06:11:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:05,474 INFO L225 Difference]: With dead ends: 75 [2022-07-23 06:11:05,474 INFO L226 Difference]: Without dead ends: 75 [2022-07-23 06:11:05,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:11:05,476 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:05,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 232 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 06:11:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-23 06:11:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-23 06:11:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:11:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-07-23 06:11:05,480 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 46 [2022-07-23 06:11:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:05,480 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-07-23 06:11:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-07-23 06:11:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:11:05,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:05,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:05,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:05,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:05,690 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:11:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash -291334127, now seen corresponding path program 1 times [2022-07-23 06:11:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:05,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776867762] [2022-07-23 06:11:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:05,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:05,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:05,693 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:05,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 06:11:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 06:11:05,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:06,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 17 [2022-07-23 06:11:06,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 20 [2022-07-23 06:11:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:06,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:07,206 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:11:07,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 46 [2022-07-23 06:11:14,260 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 06:11:14,635 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:11:14,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 151 [2022-07-23 06:11:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:18,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:18,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776867762] [2022-07-23 06:11:18,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776867762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:18,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:18,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-23 06:11:18,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266369357] [2022-07-23 06:11:18,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:18,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 06:11:18,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:18,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 06:11:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:11:18,048 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:22,184 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-07-23 06:11:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:11:22,186 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2022-07-23 06:11:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:22,187 INFO L225 Difference]: With dead ends: 78 [2022-07-23 06:11:22,187 INFO L226 Difference]: Without dead ends: 78 [2022-07-23 06:11:22,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 06:11:22,188 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 83 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:22,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 367 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 405 Invalid, 0 Unknown, 160 Unchecked, 2.1s Time] [2022-07-23 06:11:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-23 06:11:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2022-07-23 06:11:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 62 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:11:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-07-23 06:11:22,190 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 46 [2022-07-23 06:11:22,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:22,190 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-07-23 06:11:22,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-07-23 06:11:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:11:22,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:22,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:22,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:22,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:22,396 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:11:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash -291436154, now seen corresponding path program 1 times [2022-07-23 06:11:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:22,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052850835] [2022-07-23 06:11:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:22,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:22,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:22,398 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:22,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 06:11:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 06:11:22,607 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 06:11:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 06:11:22,807 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-23 06:11:22,807 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-23 06:11:22,808 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (24 of 25 remaining) [2022-07-23 06:11:22,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-07-23 06:11:22,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-07-23 06:11:22,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-07-23 06:11:22,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-07-23 06:11:22,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-07-23 06:11:22,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-07-23 06:11:22,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 25 remaining) [2022-07-23 06:11:22,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 25 remaining) [2022-07-23 06:11:22,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-07-23 06:11:22,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-07-23 06:11:22,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-07-23 06:11:22,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-07-23 06:11:22,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-07-23 06:11:22,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-07-23 06:11:22,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-07-23 06:11:22,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-07-23 06:11:22,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-07-23 06:11:22,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-07-23 06:11:22,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-07-23 06:11:22,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-07-23 06:11:22,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-07-23 06:11:22,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-07-23 06:11:22,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-07-23 06:11:22,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-07-23 06:11:22,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:23,016 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:23,018 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-23 06:11:23,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 06:11:23 BoogieIcfgContainer [2022-07-23 06:11:23,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-23 06:11:23,078 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-23 06:11:23,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-23 06:11:23,079 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-23 06:11:23,079 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:10:27" (3/4) ... [2022-07-23 06:11:23,081 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-23 06:11:23,082 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-23 06:11:23,084 INFO L158 Benchmark]: Toolchain (without parser) took 56901.78ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 35.4MB in the beginning and 41.4MB in the end (delta: -6.0MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2022-07-23 06:11:23,084 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory was 40.2MB in the beginning and 40.1MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:11:23,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 580.36ms. Allocated memory is still 58.7MB. Free memory was 35.1MB in the beginning and 23.7MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-23 06:11:23,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.08ms. Allocated memory is still 58.7MB. Free memory was 23.5MB in the beginning and 39.2MB in the end (delta: -15.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2022-07-23 06:11:23,090 INFO L158 Benchmark]: Boogie Preprocessor took 41.14ms. Allocated memory is still 58.7MB. Free memory was 39.2MB in the beginning and 37.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 06:11:23,090 INFO L158 Benchmark]: RCFGBuilder took 359.80ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 37.3MB in the beginning and 47.5MB in the end (delta: -10.3MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2022-07-23 06:11:23,090 INFO L158 Benchmark]: TraceAbstraction took 55860.15ms. Allocated memory is still 71.3MB. Free memory was 46.9MB in the beginning and 41.9MB in the end (delta: 4.9MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2022-07-23 06:11:23,090 INFO L158 Benchmark]: Witness Printer took 3.17ms. Allocated memory is still 71.3MB. Free memory was 41.9MB in the beginning and 41.4MB in the end (delta: 567.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:11:23,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory was 40.2MB in the beginning and 40.1MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 580.36ms. Allocated memory is still 58.7MB. Free memory was 35.1MB in the beginning and 23.7MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.08ms. Allocated memory is still 58.7MB. Free memory was 23.5MB in the beginning and 39.2MB in the end (delta: -15.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.14ms. Allocated memory is still 58.7MB. Free memory was 39.2MB in the beginning and 37.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 359.80ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 37.3MB in the beginning and 47.5MB in the end (delta: -10.3MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. * TraceAbstraction took 55860.15ms. Allocated memory is still 71.3MB. Free memory was 46.9MB in the beginning and 41.9MB in the end (delta: 4.9MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. * Witness Printer took 3.17ms. Allocated memory is still 71.3MB. Free memory was 41.9MB in the beginning and 41.4MB in the end (delta: 567.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 779]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 779. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L780] CALL entry_point() [L775] struct ldv_list_head list_14 = { &(list_14), &(list_14) }; [L776] CALL alloc_14(&list_14) [L762] CALL, EXPR ldv_malloc(sizeof(struct A14)) VAL [\old(size)=12, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L762] RET, EXPR ldv_malloc(sizeof(struct A14)) VAL [ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct A14))={2:0}, list={-2147483647:0}, list={-2147483647:0}] [L762] struct A14 *p = (struct A14 *)ldv_malloc(sizeof(struct A14)); [L763] COND TRUE \read(*p) VAL [ldv_global_msg_list={1:0}, list={-2147483647:0}, list={-2147483647:0}, p={2:0}] [L764] CALL ldv_list_add(&p->list, list) VAL [head={-2147483647:0}, ldv_global_msg_list={1:0}, new={2:4}] [L559] EXPR head->next VAL [head={-2147483647:0}, head={-2147483647:0}, head->next={-2147483647:0}, ldv_global_msg_list={1:0}, new={2:4}, new={2:4}] [L559] CALL __ldv_list_add(new, head, head->next) VAL [ldv_global_msg_list={1:0}, new={2:4}, next={-2147483647:0}, prev={-2147483647:0}] [L547] next->prev = new VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L548] new->next = next VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L549] new->prev = prev VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L550] prev->next = new VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L559] RET __ldv_list_add(new, head, head->next) VAL [head={-2147483647:0}, head={-2147483647:0}, head->next={-2147483647:0}, ldv_global_msg_list={1:0}, new={2:4}, new={2:4}] [L764] RET ldv_list_add(&p->list, list) VAL [ldv_global_msg_list={1:0}, list={-2147483647:0}, list={-2147483647:0}, p={2:0}] [L776] RET alloc_14(&list_14) [L777] CALL free_unsafe_14(&list_14) [L768] struct A14 *p; [L769] struct A14 *n; VAL [ldv_global_msg_list={1:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] EXPR (plist)->next VAL [(plist)->next={2:4}, ldv_global_msg_list={1:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((plist)->next); [L770] p = ({ const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((plist)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );}) VAL [__mptr={2:4}, ldv_global_msg_list={1:0}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] EXPR (p)->list.next VAL [(p)->list.next={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); [L770] n = ({ const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); (typeof(*(p)) *)( (char *)__mptr - ((size_t) &((typeof(*(p)) *)0)->list) );}) VAL [__mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] COND TRUE &p->list != (plist) VAL [__mptr={2:4}, __mptr={-2147483647:0}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L771] CALL ldv_list_del(&p->list) VAL [ldv_global_msg_list={1:0}] [L567] EXPR entry->prev VAL [entry={2:4}, entry={2:4}, entry->prev={-2147483647:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->next VAL [entry={2:4}, entry={2:4}, entry->next={-2147483647:0}, entry->prev={-2147483647:0}, ldv_global_msg_list={1:0}] [L567] CALL __ldv_list_del(entry->prev, entry->next) [L554] next->prev = prev VAL [ldv_global_msg_list={1:0}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L555] prev->next = next VAL [ldv_global_msg_list={1:0}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L567] RET __ldv_list_del(entry->prev, entry->next) [L771] RET ldv_list_del(&p->list) VAL [__mptr={2:4}, __mptr={-2147483647:0}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] p = n VAL [__mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] EXPR (n)->list.next VAL [(n)->list.next={-2147483647:0}, __mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); [L770] n = ({ const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) );}) VAL [__mptr={-2147483647:0}, __mptr={2:4}, __mptr={-2147483647:0}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] COND FALSE !(&p->list != (plist)) VAL [__mptr={-2147483647:0}, __mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L777] RET free_unsafe_14(&list_14) [L775] struct ldv_list_head list_14 = { &(list_14), &(list_14) }; VAL [ldv_global_msg_list={1:0}] [L780] RET entry_point() - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 72 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 55.8s, OverallIterations: 32, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1302 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1267 mSDsluCounter, 7649 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2341 IncrementalHoareTripleChecker+Unchecked, 6204 mSDsCounter, 173 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5184 IncrementalHoareTripleChecker+Invalid, 7698 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 173 mSolverCounterUnsat, 1445 mSDtfsCounter, 5184 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 924 GetRequests, 492 SyntacticMatches, 10 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 29.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=7, InterpolantAutomatonStates: 386, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 207 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 28.3s InterpolantComputationTime, 794 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 807 ConstructedInterpolants, 212 QuantifiedInterpolants, 11206 SizeOfPredicates, 435 NumberOfNonLiveVariables, 4333 ConjunctsInSsa, 855 ConjunctsInUnsatCore, 33 InterpolantComputations, 29 PerfectInterpolantSequences, 0/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-23 06:11:23,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample