./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test14.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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.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 57e88052da463d5b7254d94e89c581ee420b273cd207f71cae5120687b870089 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:32:30,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:32:30,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:32:30,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:32:30,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:32:30,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:32:30,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:32:30,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:32:30,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:32:30,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:32:30,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:32:30,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:32:30,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:32:30,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:32:30,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:32:30,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:32:30,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:32:30,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:32:30,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:32:30,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:32:30,061 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:32:30,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:32:30,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:32:30,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:32:30,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:32:30,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:32:30,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:32:30,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:32:30,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:32:30,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:32:30,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:32:30,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:32:30,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:32:30,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:32:30,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:32:30,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:32:30,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:32:30,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:32:30,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:32:30,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:32:30,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:32:30,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:32:30,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:32:30,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:32:30,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:32:30,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:32:30,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:32:30,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:32:30,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:32:30,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:32:30,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:32:30,100 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:32:30,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:32:30,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:32:30,100 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:32:30,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:32:30,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:32:30,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:32:30,101 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:32:30,101 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:32:30,101 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:32:30,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:32:30,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:32:30,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:32:30,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:32:30,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:32:30,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:32:30,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:32:30,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:32:30,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:32:30,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:32:30,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:32:30,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:32:30,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57e88052da463d5b7254d94e89c581ee420b273cd207f71cae5120687b870089 [2022-07-14 06:32:30,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:32:30,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:32:30,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:32:30,321 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:32:30,321 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:32:30,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test14.i [2022-07-14 06:32:30,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda95dd23/6f4e885ddd284901ad1a51cb5f2c4673/FLAGf05e94a3b [2022-07-14 06:32:30,764 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:32:30,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test14.i [2022-07-14 06:32:30,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda95dd23/6f4e885ddd284901ad1a51cb5f2c4673/FLAGf05e94a3b [2022-07-14 06:32:30,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda95dd23/6f4e885ddd284901ad1a51cb5f2c4673 [2022-07-14 06:32:30,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:32:30,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:32:30,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:32:30,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:32:30,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:32:30,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:32:30" (1/1) ... [2022-07-14 06:32:30,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6729b96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:30, skipping insertion in model container [2022-07-14 06:32:30,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:32:30" (1/1) ... [2022-07-14 06:32:30,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:32:30,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:32:31,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:32:31,120 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) [2022-07-14 06:32:31,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4af00732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:31, skipping insertion in model container [2022-07-14 06:32:31,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:32:31,121 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:32:31,122 INFO L158 Benchmark]: Toolchain (without parser) took 332.06ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 51.4MB in the beginning and 78.0MB in the end (delta: -26.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-14 06:32:31,123 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 58.0MB in the beginning and 58.0MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:32:31,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.45ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 51.2MB in the beginning and 78.0MB in the end (delta: -26.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-14 06:32:31,124 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 58.0MB in the beginning and 58.0MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.45ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 51.2MB in the beginning and 78.0MB in the end (delta: -26.9MB). Peak memory consumption was 6.3MB. 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.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 57e88052da463d5b7254d94e89c581ee420b273cd207f71cae5120687b870089 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:32:32,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:32:32,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:32:32,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:32:32,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:32:32,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:32:32,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:32:32,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:32:32,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:32:32,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:32:32,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:32:32,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:32:32,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:32:32,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:32:32,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:32:32,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:32:32,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:32:32,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:32:32,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:32:32,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:32:32,696 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:32:32,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:32:32,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:32:32,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:32:32,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:32:32,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:32:32,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:32:32,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:32:32,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:32:32,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:32:32,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:32:32,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:32:32,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:32:32,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:32:32,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:32:32,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:32:32,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:32:32,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:32:32,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:32:32,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:32:32,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:32:32,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:32:32,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:32:32,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:32:32,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:32:32,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:32:32,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:32:32,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:32:32,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:32:32,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:32:32,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:32:32,749 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:32:32,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:32:32,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:32:32,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:32:32,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:32:32,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:32:32,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:32:32,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:32:32,750 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:32:32,750 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:32:32,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:32:32,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:32:32,751 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:32:32,751 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:32:32,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:32:32,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:32:32,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:32:32,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:32:32,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:32:32,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:32:32,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:32:32,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:32:32,752 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:32:32,753 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:32:32,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:32:32,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57e88052da463d5b7254d94e89c581ee420b273cd207f71cae5120687b870089 [2022-07-14 06:32:33,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:32:33,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:32:33,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:32:33,053 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:32:33,053 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:32:33,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test14.i [2022-07-14 06:32:33,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe73a8a1/5f3ea2e0a1f741dca9c4b968ad416563/FLAG3d3d04c77 [2022-07-14 06:32:33,481 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:32:33,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test14.i [2022-07-14 06:32:33,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe73a8a1/5f3ea2e0a1f741dca9c4b968ad416563/FLAG3d3d04c77 [2022-07-14 06:32:33,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe73a8a1/5f3ea2e0a1f741dca9c4b968ad416563 [2022-07-14 06:32:33,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:32:33,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:32:33,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:32:33,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:32:33,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:32:33,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:32:33" (1/1) ... [2022-07-14 06:32:33,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32704a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:33, skipping insertion in model container [2022-07-14 06:32:33,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:32:33" (1/1) ... [2022-07-14 06:32:33,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:32:33,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:32:34,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:32:34,196 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:32:34,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:32:34,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:32:34,257 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:32:34,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:32:34,323 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:32:34,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34 WrapperNode [2022-07-14 06:32:34,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:32:34,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:32:34,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:32:34,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:32:34,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,380 INFO L137 Inliner]: procedures = 168, calls = 80, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 59 [2022-07-14 06:32:34,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:32:34,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:32:34,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:32:34,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:32:34,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:32:34,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:32:34,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:32:34,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:32:34,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (1/1) ... [2022-07-14 06:32:34,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:32:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:32:34,433 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) [2022-07-14 06:32:34,436 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 [2022-07-14 06:32:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-14 06:32:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-14 06:32:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-14 06:32:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-14 06:32:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2022-07-14 06:32:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2022-07-14 06:32:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:32:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:32:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:32:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:32:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:32:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:32:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:32:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-07-14 06:32:34,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-07-14 06:32:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:32:34,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:32:34,554 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:32:34,556 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:32:34,959 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:32:34,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:32:34,966 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-14 06:32:34,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:32:34 BoogieIcfgContainer [2022-07-14 06:32:34,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:32:34,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:32:34,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:32:34,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:32:34,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:32:33" (1/3) ... [2022-07-14 06:32:34,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ffa16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:32:34, skipping insertion in model container [2022-07-14 06:32:34,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:32:34" (2/3) ... [2022-07-14 06:32:34,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ffa16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:32:34, skipping insertion in model container [2022-07-14 06:32:34,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:32:34" (3/3) ... [2022-07-14 06:32:34,981 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test14.i [2022-07-14 06:32:34,995 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:32:34,995 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-07-14 06:32:35,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:32:35,046 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@2594ed48, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47d9f6ba [2022-07-14 06:32:35,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2022-07-14 06:32:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 70 states have internal predecessors, (73), 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) [2022-07-14 06:32:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:32:35,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:35,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:35,062 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 25 more)] === [2022-07-14 06:32:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:35,067 INFO L85 PathProgramCache]: Analyzing trace with hash -781473750, now seen corresponding path program 1 times [2022-07-14 06:32:35,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:35,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436607994] [2022-07-14 06:32:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:35,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:35,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:35,080 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) [2022-07-14 06:32:35,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:32:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:32:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:35,251 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 [2022-07-14 06:32:35,327 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:32:35,328 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 [2022-07-14 06:32:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:35,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:35,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:35,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436607994] [2022-07-14 06:32:35,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436607994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:35,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:35,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:32:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968406494] [2022-07-14 06:32:35,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:35,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:32:35,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:32:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:32:35,410 INFO L87 Difference]: Start difference. First operand has 78 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 70 states have internal predecessors, (73), 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) [2022-07-14 06:32:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:35,726 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-07-14 06:32:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:32:35,728 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 [2022-07-14 06:32:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:35,735 INFO L225 Difference]: With dead ends: 88 [2022-07-14 06:32:35,736 INFO L226 Difference]: Without dead ends: 86 [2022-07-14 06:32:35,738 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 [2022-07-14 06:32:35,745 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 68 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:35,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 153 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-07-14 06:32:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-14 06:32:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2022-07-14 06:32:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 40 states have (on average 1.725) internal successors, (69), 67 states have internal predecessors, (69), 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) [2022-07-14 06:32:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-07-14 06:32:35,776 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 12 [2022-07-14 06:32:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:35,776 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-07-14 06:32:35,776 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) [2022-07-14 06:32:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-07-14 06:32:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:32:35,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:35,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:35,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:35,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:35,985 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 25 more)] === [2022-07-14 06:32:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash -781473749, now seen corresponding path program 1 times [2022-07-14 06:32:35,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:35,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164287501] [2022-07-14 06:32:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:35,989 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) [2022-07-14 06:32:36,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:32:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:32:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:36,096 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 [2022-07-14 06:32:36,106 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 [2022-07-14 06:32:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:32:36,185 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 [2022-07-14 06:32:36,197 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:32:36,198 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 [2022-07-14 06:32:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:36,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:36,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164287501] [2022-07-14 06:32:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164287501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:36,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:36,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:32:36,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920240995] [2022-07-14 06:32:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:32:36,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:32:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:32:36,297 INFO L87 Difference]: Start difference. First operand 75 states and 77 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) [2022-07-14 06:32:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:38,725 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-07-14 06:32:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:32:38,726 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 [2022-07-14 06:32:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:38,727 INFO L225 Difference]: With dead ends: 97 [2022-07-14 06:32:38,727 INFO L226 Difference]: Without dead ends: 97 [2022-07-14 06:32:38,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-07-14 06:32:38,728 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 88 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:38,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 192 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-07-14 06:32:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-14 06:32:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2022-07-14 06:32:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.7) internal successors, (68), 66 states have internal predecessors, (68), 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) [2022-07-14 06:32:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-07-14 06:32:38,737 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 12 [2022-07-14 06:32:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:38,738 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-07-14 06:32:38,738 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) [2022-07-14 06:32:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-07-14 06:32:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:32:38,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:38,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:38,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:38,946 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 25 more)] === [2022-07-14 06:32:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:38,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1410681567, now seen corresponding path program 1 times [2022-07-14 06:32:38,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:38,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333726087] [2022-07-14 06:32:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:38,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:38,968 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) [2022-07-14 06:32:38,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:32:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:39,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:32:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:39,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:39,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:39,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333726087] [2022-07-14 06:32:39,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333726087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:39,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:39,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:32:39,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554261385] [2022-07-14 06:32:39,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:39,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:32:39,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:39,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:32:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:32:39,050 INFO L87 Difference]: Start difference. First operand 74 states and 76 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) [2022-07-14 06:32:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:39,086 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2022-07-14 06:32:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:32:39,088 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 [2022-07-14 06:32:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:39,090 INFO L225 Difference]: With dead ends: 105 [2022-07-14 06:32:39,090 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 06:32:39,091 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 [2022-07-14 06:32:39,092 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 26 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 372 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 [2022-07-14 06:32:39,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 372 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:32:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 06:32:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2022-07-14 06:32:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 69 states have internal predecessors, (71), 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) [2022-07-14 06:32:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-14 06:32:39,105 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 11 [2022-07-14 06:32:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:39,105 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-14 06:32:39,106 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) [2022-07-14 06:32:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-14 06:32:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:32:39,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:39,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:39,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:39,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:39,314 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 25 more)] === [2022-07-14 06:32:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -523177886, now seen corresponding path program 1 times [2022-07-14 06:32:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:39,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131355847] [2022-07-14 06:32:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:39,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:39,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:39,316 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) [2022-07-14 06:32:39,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:32:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:39,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:32:39,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:39,373 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 [2022-07-14 06:32:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:39,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:39,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:39,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131355847] [2022-07-14 06:32:39,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131355847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:39,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:39,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:32:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305114481] [2022-07-14 06:32:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:32:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:32:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:32:39,406 INFO L87 Difference]: Start difference. First operand 78 states and 80 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) [2022-07-14 06:32:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:39,636 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2022-07-14 06:32:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:32:39,637 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 [2022-07-14 06:32:39,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:39,637 INFO L225 Difference]: With dead ends: 105 [2022-07-14 06:32:39,637 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 06:32:39,638 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 [2022-07-14 06:32:39,638 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 76 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:39,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 111 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:32:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 06:32:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2022-07-14 06:32:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 71 states have internal predecessors, (74), 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) [2022-07-14 06:32:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-14 06:32:39,643 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 11 [2022-07-14 06:32:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:39,644 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-14 06:32:39,644 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) [2022-07-14 06:32:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-14 06:32:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:32:39,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:39,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:39,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:39,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:39,848 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 25 more)] === [2022-07-14 06:32:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash -523177885, now seen corresponding path program 1 times [2022-07-14 06:32:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:39,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602421082] [2022-07-14 06:32:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:39,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:39,850 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) [2022-07-14 06:32:39,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:32:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:32:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:39,900 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 [2022-07-14 06:32:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:39,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:39,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602421082] [2022-07-14 06:32:39,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602421082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:39,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:39,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:32:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920527447] [2022-07-14 06:32:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:39,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:32:39,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:32:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:32:39,960 INFO L87 Difference]: Start difference. First operand 81 states and 85 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) [2022-07-14 06:32:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:40,249 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-07-14 06:32:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:32:40,250 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 [2022-07-14 06:32:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:40,251 INFO L225 Difference]: With dead ends: 103 [2022-07-14 06:32:40,251 INFO L226 Difference]: Without dead ends: 103 [2022-07-14 06:32:40,251 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 [2022-07-14 06:32:40,251 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 124 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 [2022-07-14 06:32:40,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 124 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:32:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-14 06:32:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2022-07-14 06:32:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 71 states have internal predecessors, (73), 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) [2022-07-14 06:32:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-07-14 06:32:40,256 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 11 [2022-07-14 06:32:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:40,256 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-07-14 06:32:40,256 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) [2022-07-14 06:32:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-07-14 06:32:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:32:40,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:40,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:40,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:40,464 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 25 more)] === [2022-07-14 06:32:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2133290457, now seen corresponding path program 1 times [2022-07-14 06:32:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713712429] [2022-07-14 06:32:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:40,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:40,465 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) [2022-07-14 06:32:40,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:32:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:32:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:40,617 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 [2022-07-14 06:32:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:40,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:40,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:40,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713712429] [2022-07-14 06:32:40,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713712429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:40,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:40,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:32:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921902922] [2022-07-14 06:32:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:40,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:32:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:32:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:32:40,649 INFO L87 Difference]: Start difference. First operand 81 states and 84 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) [2022-07-14 06:32:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:40,891 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2022-07-14 06:32:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:32:40,891 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 [2022-07-14 06:32:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:40,892 INFO L225 Difference]: With dead ends: 93 [2022-07-14 06:32:40,892 INFO L226 Difference]: Without dead ends: 93 [2022-07-14 06:32:40,892 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 [2022-07-14 06:32:40,893 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 44 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:40,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 360 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-07-14 06:32:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-14 06:32:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-07-14 06:32:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.6) internal successors, (72), 70 states have internal predecessors, (72), 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) [2022-07-14 06:32:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-07-14 06:32:40,897 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 15 [2022-07-14 06:32:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:40,897 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-07-14 06:32:40,897 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) [2022-07-14 06:32:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-07-14 06:32:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:32:40,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:40,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:40,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-14 06:32:41,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:41,105 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 25 more)] === [2022-07-14 06:32:41,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:41,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2133290458, now seen corresponding path program 1 times [2022-07-14 06:32:41,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:41,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657435182] [2022-07-14 06:32:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:41,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:41,107 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) [2022-07-14 06:32:41,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:32:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:32:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:41,189 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 [2022-07-14 06:32:41,195 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 [2022-07-14 06:32:41,215 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 [2022-07-14 06:32:41,219 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 [2022-07-14 06:32:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:32:43,345 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 [2022-07-14 06:32:43,355 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:32:43,355 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 [2022-07-14 06:32:43,486 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 [2022-07-14 06:32:43,492 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 [2022-07-14 06:32:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:43,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:43,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:43,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657435182] [2022-07-14 06:32:43,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657435182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:43,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:43,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:32:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414188248] [2022-07-14 06:32:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:43,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:32:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:32:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2022-07-14 06:32:43,571 INFO L87 Difference]: Start difference. First operand 80 states and 83 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) [2022-07-14 06:32:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:43,967 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-07-14 06:32:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:32:43,980 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 [2022-07-14 06:32:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:43,980 INFO L225 Difference]: With dead ends: 97 [2022-07-14 06:32:43,981 INFO L226 Difference]: Without dead ends: 97 [2022-07-14 06:32:43,981 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 [2022-07-14 06:32:43,981 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 28 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:43,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 400 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-07-14 06:32:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-14 06:32:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-07-14 06:32:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 78 states have internal predecessors, (86), 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) [2022-07-14 06:32:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-07-14 06:32:44,000 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 15 [2022-07-14 06:32:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:44,000 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-07-14 06:32:44,000 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) [2022-07-14 06:32:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-07-14 06:32:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:32:44,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:44,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:44,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:44,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:44,201 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 25 more)] === [2022-07-14 06:32:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 336339099, now seen corresponding path program 1 times [2022-07-14 06:32:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751048462] [2022-07-14 06:32:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:44,203 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) [2022-07-14 06:32:44,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:32:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:44,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:32:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:44,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:44,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751048462] [2022-07-14 06:32:44,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751048462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:44,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:44,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:32:44,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059191258] [2022-07-14 06:32:44,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:44,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:32:44,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:32:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:32:44,298 INFO L87 Difference]: Start difference. First operand 90 states and 99 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) [2022-07-14 06:32:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:44,315 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-14 06:32:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:32:44,316 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 [2022-07-14 06:32:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:44,316 INFO L225 Difference]: With dead ends: 100 [2022-07-14 06:32:44,316 INFO L226 Difference]: Without dead ends: 100 [2022-07-14 06:32:44,317 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 [2022-07-14 06:32:44,317 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 24 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 292 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 [2022-07-14 06:32:44,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 292 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:32:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-14 06:32:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2022-07-14 06:32:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 68 states have internal predecessors, (70), 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) [2022-07-14 06:32:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-07-14 06:32:44,321 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 15 [2022-07-14 06:32:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:44,321 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-07-14 06:32:44,321 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) [2022-07-14 06:32:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-07-14 06:32:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:32:44,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:44,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:44,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:44,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:44,530 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 25 more)] === [2022-07-14 06:32:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:44,530 INFO L85 PathProgramCache]: Analyzing trace with hash -262774844, now seen corresponding path program 1 times [2022-07-14 06:32:44,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:44,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836175794] [2022-07-14 06:32:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:44,532 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) [2022-07-14 06:32:44,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:32:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:32:44,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:44,589 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 [2022-07-14 06:32:44,612 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 [2022-07-14 06:32:44,707 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 [2022-07-14 06:32:44,710 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 [2022-07-14 06:32:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:44,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:44,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836175794] [2022-07-14 06:32:44,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836175794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:44,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:44,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:32:44,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920842705] [2022-07-14 06:32:44,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:44,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:32:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:32:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:32:44,746 INFO L87 Difference]: Start difference. First operand 78 states and 79 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) [2022-07-14 06:32:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:45,058 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2022-07-14 06:32:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:32:45,059 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 [2022-07-14 06:32:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:45,059 INFO L225 Difference]: With dead ends: 90 [2022-07-14 06:32:45,059 INFO L226 Difference]: Without dead ends: 90 [2022-07-14 06:32:45,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:32:45,060 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 23 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:45,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 251 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-07-14 06:32:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-14 06:32:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-07-14 06:32:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.54) internal successors, (77), 73 states have internal predecessors, (77), 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) [2022-07-14 06:32:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-07-14 06:32:45,063 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 13 [2022-07-14 06:32:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:45,064 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-07-14 06:32:45,064 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) [2022-07-14 06:32:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-07-14 06:32:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:32:45,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:45,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:45,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:45,276 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 25 more)] === [2022-07-14 06:32:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash -262774845, now seen corresponding path program 1 times [2022-07-14 06:32:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:45,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914279713] [2022-07-14 06:32:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:45,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:45,280 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) [2022-07-14 06:32:45,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:32:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:32:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:45,328 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 [2022-07-14 06:32:45,346 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 [2022-07-14 06:32:45,399 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 [2022-07-14 06:32:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:45,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:45,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914279713] [2022-07-14 06:32:45,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914279713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:45,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:45,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:32:45,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706649041] [2022-07-14 06:32:45,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:45,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:32:45,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:45,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:32:45,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:32:45,416 INFO L87 Difference]: Start difference. First operand 84 states and 88 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) [2022-07-14 06:32:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:45,625 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-07-14 06:32:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:32:45,625 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 [2022-07-14 06:32:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:45,626 INFO L225 Difference]: With dead ends: 93 [2022-07-14 06:32:45,626 INFO L226 Difference]: Without dead ends: 93 [2022-07-14 06:32:45,626 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 [2022-07-14 06:32:45,626 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:45,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 235 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-07-14 06:32:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-14 06:32:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-07-14 06:32:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 54 states have (on average 1.537037037037037) internal successors, (83), 77 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-14 06:32:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2022-07-14 06:32:45,629 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 13 [2022-07-14 06:32:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:45,629 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2022-07-14 06:32:45,629 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) [2022-07-14 06:32:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2022-07-14 06:32:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:32:45,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:45,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:45,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:45,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:45,839 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 25 more)] === [2022-07-14 06:32:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1707494783, now seen corresponding path program 1 times [2022-07-14 06:32:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:45,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365202896] [2022-07-14 06:32:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:45,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:45,840 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) [2022-07-14 06:32:45,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:32:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:45,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:32:45,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:45,910 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 [2022-07-14 06:32:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:45,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:45,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:45,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365202896] [2022-07-14 06:32:45,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365202896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:45,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:45,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:32:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34796695] [2022-07-14 06:32:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:32:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:32:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:32:45,980 INFO L87 Difference]: Start difference. First operand 89 states and 96 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) [2022-07-14 06:32:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:46,305 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-07-14 06:32:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:32:46,305 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 [2022-07-14 06:32:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:46,306 INFO L225 Difference]: With dead ends: 90 [2022-07-14 06:32:46,306 INFO L226 Difference]: Without dead ends: 90 [2022-07-14 06:32:46,306 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 [2022-07-14 06:32:46,306 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 39 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:46,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 326 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:32:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-14 06:32:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-07-14 06:32:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.5) internal successors, (81), 75 states have internal predecessors, (81), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-14 06:32:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2022-07-14 06:32:46,310 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 16 [2022-07-14 06:32:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:46,310 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2022-07-14 06:32:46,310 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) [2022-07-14 06:32:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2022-07-14 06:32:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:32:46,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:46,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:46,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:46,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:46,518 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 25 more)] === [2022-07-14 06:32:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1707494784, now seen corresponding path program 1 times [2022-07-14 06:32:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:46,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294229599] [2022-07-14 06:32:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:46,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:46,520 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) [2022-07-14 06:32:46,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:32:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:32:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:46,599 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 [2022-07-14 06:32:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:46,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:46,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:46,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294229599] [2022-07-14 06:32:46,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294229599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:46,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:46,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:32:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216290313] [2022-07-14 06:32:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:32:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:32:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:32:46,728 INFO L87 Difference]: Start difference. First operand 87 states and 94 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) [2022-07-14 06:32:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:47,053 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-07-14 06:32:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:32:47,054 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 [2022-07-14 06:32:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:47,054 INFO L225 Difference]: With dead ends: 90 [2022-07-14 06:32:47,054 INFO L226 Difference]: Without dead ends: 90 [2022-07-14 06:32:47,055 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 [2022-07-14 06:32:47,055 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 49 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:47,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 418 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:32:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-14 06:32:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-07-14 06:32:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.462962962962963) internal successors, (79), 73 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-14 06:32:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-07-14 06:32:47,057 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 16 [2022-07-14 06:32:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:47,057 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-07-14 06:32:47,057 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) [2022-07-14 06:32:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-07-14 06:32:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:32:47,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:47,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:47,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:47,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:47,259 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 25 more)] === [2022-07-14 06:32:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash 224981282, now seen corresponding path program 1 times [2022-07-14 06:32:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:47,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660965775] [2022-07-14 06:32:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:47,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:47,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:47,260 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) [2022-07-14 06:32:47,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:32:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:32:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:47,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:47,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:47,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660965775] [2022-07-14 06:32:47,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660965775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:47,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:47,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:32:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351175031] [2022-07-14 06:32:47,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:32:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:32:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:32:47,357 INFO L87 Difference]: Start difference. First operand 85 states and 92 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) [2022-07-14 06:32:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:47,468 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-07-14 06:32:47,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:32:47,468 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 [2022-07-14 06:32:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:47,468 INFO L225 Difference]: With dead ends: 84 [2022-07-14 06:32:47,469 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 06:32:47,469 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 [2022-07-14 06:32:47,469 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:47,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 171 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:32:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 06:32:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-14 06:32:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 72 states have internal predecessors, (78), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-14 06:32:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2022-07-14 06:32:47,471 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 18 [2022-07-14 06:32:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:47,471 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2022-07-14 06:32:47,471 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) [2022-07-14 06:32:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2022-07-14 06:32:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:32:47,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:47,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:47,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:47,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:47,672 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 25 more)] === [2022-07-14 06:32:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash 224981283, now seen corresponding path program 1 times [2022-07-14 06:32:47,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:47,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253700383] [2022-07-14 06:32:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:47,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:47,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:47,674 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) [2022-07-14 06:32:47,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:32:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:32:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:47,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:47,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:47,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253700383] [2022-07-14 06:32:47,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253700383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:47,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:47,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:32:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641987154] [2022-07-14 06:32:47,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:32:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:32:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:32:47,826 INFO L87 Difference]: Start difference. First operand 84 states and 91 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) [2022-07-14 06:32:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:48,030 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-07-14 06:32:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:32:48,030 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 [2022-07-14 06:32:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:48,031 INFO L225 Difference]: With dead ends: 83 [2022-07-14 06:32:48,031 INFO L226 Difference]: Without dead ends: 83 [2022-07-14 06:32:48,031 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 [2022-07-14 06:32:48,031 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 41 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:48,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 311 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:32:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-14 06:32:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-07-14 06:32:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 71 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-14 06:32:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-07-14 06:32:48,034 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 18 [2022-07-14 06:32:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:48,034 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-07-14 06:32:48,034 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) [2022-07-14 06:32:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-07-14 06:32:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:32:48,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:48,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:48,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:48,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:48,242 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 25 more)] === [2022-07-14 06:32:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1052662622, now seen corresponding path program 1 times [2022-07-14 06:32:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:48,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939862367] [2022-07-14 06:32:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:48,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:48,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:48,244 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) [2022-07-14 06:32:48,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:32:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:32:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:48,395 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:32:48,396 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 [2022-07-14 06:32:48,401 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:32:48,401 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 [2022-07-14 06:32:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:48,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:48,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939862367] [2022-07-14 06:32:48,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939862367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:48,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:48,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:32:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415348559] [2022-07-14 06:32:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:32:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:32:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:32:48,463 INFO L87 Difference]: Start difference. First operand 83 states and 90 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) [2022-07-14 06:32:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:48,615 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-07-14 06:32:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:32:48,616 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 [2022-07-14 06:32:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:48,617 INFO L225 Difference]: With dead ends: 85 [2022-07-14 06:32:48,617 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 06:32:48,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:32:48,617 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 16 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:48,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 263 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-07-14 06:32:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 06:32:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-07-14 06:32:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 70 states have internal predecessors, (75), 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) [2022-07-14 06:32:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2022-07-14 06:32:48,619 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 18 [2022-07-14 06:32:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:48,619 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2022-07-14 06:32:48,620 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) [2022-07-14 06:32:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2022-07-14 06:32:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:32:48,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:48,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:32:48,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:48,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:48,821 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:32:48,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1052560596, now seen corresponding path program 1 times [2022-07-14 06:32:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:48,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899790242] [2022-07-14 06:32:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:48,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:48,822 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) [2022-07-14 06:32:48,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:32:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:32:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:49,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:49,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899790242] [2022-07-14 06:32:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899790242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:49,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:49,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:32:49,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136030442] [2022-07-14 06:32:49,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:32:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:32:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:32:49,021 INFO L87 Difference]: Start difference. First operand 81 states and 86 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) [2022-07-14 06:32:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:49,090 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-07-14 06:32:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:32:49,091 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 [2022-07-14 06:32:49,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:49,091 INFO L225 Difference]: With dead ends: 84 [2022-07-14 06:32:49,091 INFO L226 Difference]: Without dead ends: 71 [2022-07-14 06:32:49,091 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 [2022-07-14 06:32:49,092 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:49,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 117 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-07-14 06:32:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-14 06:32:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-07-14 06:32:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 61 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-14 06:32:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-07-14 06:32:49,102 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 18 [2022-07-14 06:32:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:49,102 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-07-14 06:32:49,102 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) [2022-07-14 06:32:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-07-14 06:32:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:32:49,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:49,103 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] [2022-07-14 06:32:49,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:49,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:49,310 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 25 more)] === [2022-07-14 06:32:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash 874346275, now seen corresponding path program 1 times [2022-07-14 06:32:49,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:49,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341103007] [2022-07-14 06:32:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:49,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:49,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:49,313 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) [2022-07-14 06:32:49,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:32:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:32:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:49,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:49,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:49,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341103007] [2022-07-14 06:32:49,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341103007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:49,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:49,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:32:49,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918448482] [2022-07-14 06:32:49,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:49,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:32:49,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:32:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:32:49,472 INFO L87 Difference]: Start difference. First operand 71 states and 75 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) [2022-07-14 06:32:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:49,598 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-07-14 06:32:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:32:49,598 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 [2022-07-14 06:32:49,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:49,601 INFO L225 Difference]: With dead ends: 73 [2022-07-14 06:32:49,602 INFO L226 Difference]: Without dead ends: 73 [2022-07-14 06:32:49,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:32:49,602 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 58 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:49,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 212 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-07-14 06:32:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-14 06:32:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-07-14 06:32:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 60 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-14 06:32:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-07-14 06:32:49,606 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 25 [2022-07-14 06:32:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:49,606 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-07-14 06:32:49,607 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) [2022-07-14 06:32:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-07-14 06:32:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:32:49,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:49,609 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] [2022-07-14 06:32:49,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-14 06:32:49,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:49,819 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 25 more)] === [2022-07-14 06:32:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash 874346276, now seen corresponding path program 1 times [2022-07-14 06:32:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064493321] [2022-07-14 06:32:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:49,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:49,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:49,824 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) [2022-07-14 06:32:49,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:32:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:32:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:49,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:49,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064493321] [2022-07-14 06:32:49,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064493321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:49,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:49,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:32:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732891625] [2022-07-14 06:32:49,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:49,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:32:49,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:32:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:32:49,991 INFO L87 Difference]: Start difference. First operand 70 states and 74 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) [2022-07-14 06:32:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:50,229 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2022-07-14 06:32:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:32:50,230 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 [2022-07-14 06:32:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:50,230 INFO L225 Difference]: With dead ends: 69 [2022-07-14 06:32:50,230 INFO L226 Difference]: Without dead ends: 69 [2022-07-14 06:32:50,230 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 [2022-07-14 06:32:50,231 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 64 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 200 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 [2022-07-14 06:32:50,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 200 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:32:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-14 06:32:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-14 06:32:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 59 states have internal predecessors, (63), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-14 06:32:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-07-14 06:32:50,233 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 25 [2022-07-14 06:32:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:50,233 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-07-14 06:32:50,234 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) [2022-07-14 06:32:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-07-14 06:32:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:32:50,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:50,234 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] [2022-07-14 06:32:50,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:50,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:50,441 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 25 more)] === [2022-07-14 06:32:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1566819771, now seen corresponding path program 1 times [2022-07-14 06:32:50,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:50,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021720940] [2022-07-14 06:32:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:50,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:50,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:50,443 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) [2022-07-14 06:32:50,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:32:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-14 06:32:50,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:50,559 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 [2022-07-14 06:32:50,769 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 [2022-07-14 06:32:50,775 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 [2022-07-14 06:32:50,934 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 [2022-07-14 06:32:50,937 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 [2022-07-14 06:32:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:50,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:50,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021720940] [2022-07-14 06:32:50,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021720940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:50,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:50,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-14 06:32:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152382078] [2022-07-14 06:32:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:50,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:32:50,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:32:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:32:50,996 INFO L87 Difference]: Start difference. First operand 69 states and 73 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) [2022-07-14 06:32:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:51,255 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-07-14 06:32:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:32:51,256 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 [2022-07-14 06:32:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:51,256 INFO L225 Difference]: With dead ends: 76 [2022-07-14 06:32:51,256 INFO L226 Difference]: Without dead ends: 76 [2022-07-14 06:32:51,257 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 [2022-07-14 06:32:51,257 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 28 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:51,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 265 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-07-14 06:32:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-14 06:32:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-07-14 06:32:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-14 06:32:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-07-14 06:32:51,260 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 27 [2022-07-14 06:32:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:51,260 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-07-14 06:32:51,260 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) [2022-07-14 06:32:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-07-14 06:32:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:32:51,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:51,260 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] [2022-07-14 06:32:51,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:51,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:51,472 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 25 more)] === [2022-07-14 06:32:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1566819772, now seen corresponding path program 1 times [2022-07-14 06:32:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:51,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078108684] [2022-07-14 06:32:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:51,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:51,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:51,474 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) [2022-07-14 06:32:51,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 06:32:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:51,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:32:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:51,583 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 [2022-07-14 06:32:51,749 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 [2022-07-14 06:32:51,853 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 [2022-07-14 06:32:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:51,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:51,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078108684] [2022-07-14 06:32:51,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078108684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:51,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:51,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:32:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294350325] [2022-07-14 06:32:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:51,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:32:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:32:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:32:51,891 INFO L87 Difference]: Start difference. First operand 68 states and 71 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) [2022-07-14 06:32:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:52,138 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-07-14 06:32:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:32:52,138 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 [2022-07-14 06:32:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:52,138 INFO L225 Difference]: With dead ends: 69 [2022-07-14 06:32:52,138 INFO L226 Difference]: Without dead ends: 69 [2022-07-14 06:32:52,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:32:52,139 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:52,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 315 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 175 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-07-14 06:32:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-14 06:32:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-07-14 06:32:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-14 06:32:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-07-14 06:32:52,141 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 27 [2022-07-14 06:32:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:52,142 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-07-14 06:32:52,142 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) [2022-07-14 06:32:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-07-14 06:32:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:32:52,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:52,142 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] [2022-07-14 06:32:52,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:52,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:52,355 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 25 more)] === [2022-07-14 06:32:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash 204597629, now seen corresponding path program 1 times [2022-07-14 06:32:52,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732972328] [2022-07-14 06:32:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:52,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:52,358 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) [2022-07-14 06:32:52,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:32:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:32:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:52,478 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 [2022-07-14 06:32:52,615 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 [2022-07-14 06:32:52,716 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 [2022-07-14 06:32:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:52,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:52,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:52,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732972328] [2022-07-14 06:32:52,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732972328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:52,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:52,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-14 06:32:52,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005199025] [2022-07-14 06:32:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:52,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:32:52,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:52,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:32:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:32:52,802 INFO L87 Difference]: Start difference. First operand 67 states and 70 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) [2022-07-14 06:32:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:53,208 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-07-14 06:32:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:32:53,208 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 [2022-07-14 06:32:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:53,209 INFO L225 Difference]: With dead ends: 84 [2022-07-14 06:32:53,209 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 06:32:53,209 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 [2022-07-14 06:32:53,210 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:53,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 281 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 295 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2022-07-14 06:32:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 06:32:53,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-07-14 06:32:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 65 states have internal predecessors, (74), 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) [2022-07-14 06:32:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-07-14 06:32:53,213 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 32 [2022-07-14 06:32:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:53,213 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-07-14 06:32:53,213 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) [2022-07-14 06:32:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-07-14 06:32:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:32:53,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:53,214 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] [2022-07-14 06:32:53,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-14 06:32:53,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:53,416 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 25 more)] === [2022-07-14 06:32:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash 204597630, now seen corresponding path program 1 times [2022-07-14 06:32:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943069959] [2022-07-14 06:32:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:53,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:53,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:53,418 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) [2022-07-14 06:32:53,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 06:32:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 06:32:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:53,529 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 [2022-07-14 06:32:53,734 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 [2022-07-14 06:32:53,738 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 [2022-07-14 06:32:53,888 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 [2022-07-14 06:32:53,891 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 [2022-07-14 06:32:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:54,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:54,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943069959] [2022-07-14 06:32:54,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943069959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:54,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:54,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-14 06:32:54,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419743061] [2022-07-14 06:32:54,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:54,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:32:54,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:54,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:32:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:32:54,004 INFO L87 Difference]: Start difference. First operand 76 states and 84 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) [2022-07-14 06:32:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:54,363 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-07-14 06:32:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:32:54,365 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 [2022-07-14 06:32:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:54,365 INFO L225 Difference]: With dead ends: 84 [2022-07-14 06:32:54,365 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 06:32:54,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:32:54,366 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 48 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:54,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 418 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-07-14 06:32:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 06:32:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-07-14 06:32:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 65 states have internal predecessors, (72), 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) [2022-07-14 06:32:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-07-14 06:32:54,368 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 32 [2022-07-14 06:32:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:54,368 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-07-14 06:32:54,368 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) [2022-07-14 06:32:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-07-14 06:32:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:32:54,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:54,369 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] [2022-07-14 06:32:54,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:54,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:54,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:32:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:54,576 INFO L85 PathProgramCache]: Analyzing trace with hash 204495603, now seen corresponding path program 1 times [2022-07-14 06:32:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:54,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846639092] [2022-07-14 06:32:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:54,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:54,577 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) [2022-07-14 06:32:54,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:32:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:54,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:32:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:54,796 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 [2022-07-14 06:32:54,868 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:32:54,869 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 [2022-07-14 06:32:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:54,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:54,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:54,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846639092] [2022-07-14 06:32:54,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846639092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:54,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:54,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:32:54,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488372540] [2022-07-14 06:32:54,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:54,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:32:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:32:54,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:32:54,914 INFO L87 Difference]: Start difference. First operand 76 states and 82 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) [2022-07-14 06:32:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:55,326 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-07-14 06:32:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:32:55,326 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 [2022-07-14 06:32:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:55,326 INFO L225 Difference]: With dead ends: 78 [2022-07-14 06:32:55,326 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 06:32:55,327 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 [2022-07-14 06:32:55,327 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 42 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:55,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 485 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:32:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 06:32:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-07-14 06:32:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 65 states have internal predecessors, (71), 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) [2022-07-14 06:32:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-07-14 06:32:55,329 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 32 [2022-07-14 06:32:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:55,329 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-07-14 06:32:55,329 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) [2022-07-14 06:32:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-07-14 06:32:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:32:55,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:55,330 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] [2022-07-14 06:32:55,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-14 06:32:55,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:55,537 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 25 more)] === [2022-07-14 06:32:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:55,538 INFO L85 PathProgramCache]: Analyzing trace with hash 609411339, now seen corresponding path program 1 times [2022-07-14 06:32:55,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:55,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986181053] [2022-07-14 06:32:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:55,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:55,539 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) [2022-07-14 06:32:55,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:32:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:32:55,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:55,692 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:32:55,693 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 [2022-07-14 06:32:55,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:32:55,743 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 [2022-07-14 06:32:55,840 INFO L356 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2022-07-14 06:32:55,840 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 [2022-07-14 06:32:56,154 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 [2022-07-14 06:32:56,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:32:56,238 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 [2022-07-14 06:32:56,251 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 [2022-07-14 06:32:56,274 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:32:56,275 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 [2022-07-14 06:32:56,470 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 [2022-07-14 06:32:56,585 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 [2022-07-14 06:32:56,919 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:32:56,919 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 [2022-07-14 06:32:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:56,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:56,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:56,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986181053] [2022-07-14 06:32:56,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986181053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:56,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:56,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-14 06:32:56,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788376817] [2022-07-14 06:32:56,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:56,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:32:56,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:32:56,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:32:56,993 INFO L87 Difference]: Start difference. First operand 76 states and 81 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) [2022-07-14 06:32:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:57,547 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-07-14 06:32:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:32:57,548 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 [2022-07-14 06:32:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:57,548 INFO L225 Difference]: With dead ends: 77 [2022-07-14 06:32:57,548 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 06:32:57,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:32:57,549 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:57,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 344 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 212 Unchecked, 0.2s Time] [2022-07-14 06:32:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 06:32:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-07-14 06:32:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 65 states have internal predecessors, (70), 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) [2022-07-14 06:32:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-07-14 06:32:57,551 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 35 [2022-07-14 06:32:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:57,551 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-07-14 06:32:57,551 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) [2022-07-14 06:32:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-07-14 06:32:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:32:57,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:57,551 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] [2022-07-14 06:32:57,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:32:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:32:57,759 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 25 more)] === [2022-07-14 06:32:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:32:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 609411340, now seen corresponding path program 1 times [2022-07-14 06:32:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:32:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138672782] [2022-07-14 06:32:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:32:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:32:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:32:57,761 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) [2022-07-14 06:32:57,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 06:32:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:32:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-14 06:32:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:32:57,917 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 [2022-07-14 06:32:57,927 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 [2022-07-14 06:32:57,951 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 [2022-07-14 06:32:57,955 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 [2022-07-14 06:32:58,050 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:32:58,051 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 [2022-07-14 06:32:58,069 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:32:58,069 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 [2022-07-14 06:32:58,188 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 [2022-07-14 06:32:58,193 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 [2022-07-14 06:32:58,431 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 [2022-07-14 06:32:58,444 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 [2022-07-14 06:32:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:32:58,523 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 [2022-07-14 06:32:58,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:32:58,536 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 [2022-07-14 06:32:58,564 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:32:58,564 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 [2022-07-14 06:32:58,596 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:32:58,597 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 [2022-07-14 06:32:58,924 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 [2022-07-14 06:32:58,931 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 [2022-07-14 06:32:59,543 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:32:59,543 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 [2022-07-14 06:32:59,548 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 [2022-07-14 06:32:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:32:59,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:32:59,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:32:59,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138672782] [2022-07-14 06:32:59,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138672782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:32:59,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:32:59,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-14 06:32:59,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51537283] [2022-07-14 06:32:59,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:32:59,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:32:59,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:32:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:32:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:32:59,654 INFO L87 Difference]: Start difference. First operand 76 states and 80 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) [2022-07-14 06:32:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:32:59,918 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-07-14 06:32:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:32:59,918 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 [2022-07-14 06:32:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:32:59,919 INFO L225 Difference]: With dead ends: 78 [2022-07-14 06:32:59,919 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 06:32:59,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:32:59,923 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:32:59,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 311 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 282 Unchecked, 0.1s Time] [2022-07-14 06:32:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 06:32:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-07-14 06:32:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 65 states have internal predecessors, (69), 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) [2022-07-14 06:32:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-07-14 06:32:59,925 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 35 [2022-07-14 06:32:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:32:59,925 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-07-14 06:32:59,925 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) [2022-07-14 06:32:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-07-14 06:32:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 06:32:59,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:32:59,934 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] [2022-07-14 06:32:59,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:00,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:00,139 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 25 more)] === [2022-07-14 06:33:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1711882371, now seen corresponding path program 1 times [2022-07-14 06:33:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005474504] [2022-07-14 06:33:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:00,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:00,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:00,141 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) [2022-07-14 06:33:00,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:33:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:33:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:00,302 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 [2022-07-14 06:33:00,352 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:00,352 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 [2022-07-14 06:33:00,548 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 [2022-07-14 06:33:00,613 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 [2022-07-14 06:33:00,629 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-14 06:33:00,630 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 [2022-07-14 06:33:00,865 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 [2022-07-14 06:33:01,108 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:33:01,109 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 [2022-07-14 06:33:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:01,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:01,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:01,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005474504] [2022-07-14 06:33:01,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005474504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:01,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:01,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-14 06:33:01,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044142238] [2022-07-14 06:33:01,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:01,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:33:01,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:33:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:33:01,171 INFO L87 Difference]: Start difference. First operand 76 states and 79 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) [2022-07-14 06:33:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:02,064 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-07-14 06:33:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:33:02,065 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 [2022-07-14 06:33:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:02,065 INFO L225 Difference]: With dead ends: 77 [2022-07-14 06:33:02,065 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 06:33:02,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:33:02,066 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 229 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 299 Invalid, 0 Unknown, 179 Unchecked, 0.4s Time] [2022-07-14 06:33:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 06:33:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-07-14 06:33:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 65 states have internal predecessors, (68), 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) [2022-07-14 06:33:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-07-14 06:33:02,068 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 36 [2022-07-14 06:33:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:02,068 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-07-14 06:33:02,068 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) [2022-07-14 06:33:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-07-14 06:33:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 06:33:02,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:02,069 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] [2022-07-14 06:33:02,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:02,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:02,276 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 25 more)] === [2022-07-14 06:33:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1711882372, now seen corresponding path program 1 times [2022-07-14 06:33:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:02,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959778514] [2022-07-14 06:33:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:02,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:02,278 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) [2022-07-14 06:33:02,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-14 06:33:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-14 06:33:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:02,432 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 [2022-07-14 06:33:02,436 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 [2022-07-14 06:33:02,521 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:33:02,521 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 [2022-07-14 06:33:02,536 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:02,536 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 [2022-07-14 06:33:02,761 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 [2022-07-14 06:33:02,772 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 [2022-07-14 06:33:02,860 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-14 06:33:02,860 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 [2022-07-14 06:33:02,888 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-14 06:33:02,889 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 [2022-07-14 06:33:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:03,696 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:33:03,696 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 [2022-07-14 06:33:03,700 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 [2022-07-14 06:33:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:03,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:03,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:03,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959778514] [2022-07-14 06:33:03,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959778514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:03,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:03,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-14 06:33:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990559193] [2022-07-14 06:33:03,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:03,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:33:03,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:33:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:33:03,820 INFO L87 Difference]: Start difference. First operand 76 states and 78 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) [2022-07-14 06:33:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:04,452 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-14 06:33:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:33:04,453 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 [2022-07-14 06:33:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:04,453 INFO L225 Difference]: With dead ends: 76 [2022-07-14 06:33:04,454 INFO L226 Difference]: Without dead ends: 76 [2022-07-14 06:33:04,454 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 [2022-07-14 06:33:04,454 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:04,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 283 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 308 Unchecked, 0.3s Time] [2022-07-14 06:33:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-14 06:33:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-14 06:33:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 65 states have internal predecessors, (67), 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) [2022-07-14 06:33:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-07-14 06:33:04,457 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 36 [2022-07-14 06:33:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:04,458 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-07-14 06:33:04,458 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) [2022-07-14 06:33:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-07-14 06:33:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:33:04,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:04,459 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] [2022-07-14 06:33:04,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-14 06:33:04,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:04,660 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:33:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash 270693189, now seen corresponding path program 1 times [2022-07-14 06:33:04,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:04,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405164531] [2022-07-14 06:33:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:04,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:04,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:04,666 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) [2022-07-14 06:33:04,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 06:33:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:33:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:05,050 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 [2022-07-14 06:33:05,234 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 23 treesize of output 11 [2022-07-14 06:33:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:05,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:05,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:05,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405164531] [2022-07-14 06:33:05,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405164531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:05,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:05,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:33:05,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593220724] [2022-07-14 06:33:05,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:05,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:33:05,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:05,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:33:05,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:33:05,393 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:33:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:05,685 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-07-14 06:33:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:33:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 4 states have call successors, (4), 2 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 [2022-07-14 06:33:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:05,686 INFO L225 Difference]: With dead ends: 105 [2022-07-14 06:33:05,686 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 06:33:05,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:33:05,687 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 110 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:05,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 435 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 130 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-07-14 06:33:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 06:33:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2022-07-14 06:33:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 65 states have internal predecessors, (66), 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) [2022-07-14 06:33:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-07-14 06:33:05,690 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 41 [2022-07-14 06:33:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-07-14 06:33:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:33:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-07-14 06:33:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:33:05,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:05,691 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] [2022-07-14 06:33:05,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:05,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:05,891 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:33:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1727710868, now seen corresponding path program 1 times [2022-07-14 06:33:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:05,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589917046] [2022-07-14 06:33:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:05,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:05,893 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) [2022-07-14 06:33:05,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 06:33:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-14 06:33:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:06,085 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 [2022-07-14 06:33:06,102 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 [2022-07-14 06:33:08,166 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:33:08,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:33:08,248 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 [2022-07-14 06:33:08,464 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 [2022-07-14 06:33:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:08,524 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 [2022-07-14 06:33:08,541 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 [2022-07-14 06:33:08,564 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:33:08,564 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 [2022-07-14 06:33:08,745 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 [2022-07-14 06:33:08,845 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 [2022-07-14 06:33:09,108 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:33:09,109 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 20 treesize of output 11 [2022-07-14 06:33:09,264 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-14 06:33:09,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 20 [2022-07-14 06:33:09,329 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 15 treesize of output 17 [2022-07-14 06:33:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:09,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:09,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:09,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589917046] [2022-07-14 06:33:09,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589917046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:09,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:09,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-14 06:33:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757307371] [2022-07-14 06:33:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:09,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:33:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:33:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:33:09,365 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-07-14 06:33:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:09,644 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-07-14 06:33:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:33:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 44 [2022-07-14 06:33:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:09,645 INFO L225 Difference]: With dead ends: 79 [2022-07-14 06:33:09,645 INFO L226 Difference]: Without dead ends: 79 [2022-07-14 06:33:09,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:33:09,646 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:09,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 323 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 247 Unchecked, 0.2s Time] [2022-07-14 06:33:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-14 06:33:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-07-14 06:33:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 67 states have internal predecessors, (69), 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) [2022-07-14 06:33:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-07-14 06:33:09,648 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 44 [2022-07-14 06:33:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:09,648 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-07-14 06:33:09,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-07-14 06:33:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-07-14 06:33:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:33:09,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:09,648 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] [2022-07-14 06:33:09,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-14 06:33:09,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:09,849 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:33:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1727710867, now seen corresponding path program 1 times [2022-07-14 06:33:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:09,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243452865] [2022-07-14 06:33:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:09,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:09,850 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) [2022-07-14 06:33:09,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 06:33:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:10,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-14 06:33:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:10,057 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 [2022-07-14 06:33:10,067 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 [2022-07-14 06:33:10,090 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 [2022-07-14 06:33:10,093 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 [2022-07-14 06:33:10,179 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:33:10,179 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 [2022-07-14 06:33:10,198 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:10,198 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 [2022-07-14 06:33:10,332 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 [2022-07-14 06:33:10,335 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 [2022-07-14 06:33:10,612 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 [2022-07-14 06:33:10,625 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 [2022-07-14 06:33:10,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:10,700 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 [2022-07-14 06:33:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:10,721 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 [2022-07-14 06:33:10,756 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:33:10,756 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 [2022-07-14 06:33:10,801 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:33:10,802 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 [2022-07-14 06:33:11,093 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 [2022-07-14 06:33:11,103 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 [2022-07-14 06:33:11,415 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:33:11,415 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 [2022-07-14 06:33:11,418 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 [2022-07-14 06:33:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:11,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:11,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243452865] [2022-07-14 06:33:11,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243452865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:11,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:11,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-14 06:33:11,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782309835] [2022-07-14 06:33:11,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:11,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:33:11,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:33:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:33:11,610 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 21 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2022-07-14 06:33:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:11,872 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-07-14 06:33:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:33:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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 44 [2022-07-14 06:33:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:11,874 INFO L225 Difference]: With dead ends: 98 [2022-07-14 06:33:11,874 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 06:33:11,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:33:11,874 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:11,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 477 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 259 Unchecked, 0.1s Time] [2022-07-14 06:33:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 06:33:11,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2022-07-14 06:33:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 67 states have internal predecessors, (68), 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) [2022-07-14 06:33:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-07-14 06:33:11,877 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 44 [2022-07-14 06:33:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:11,877 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-07-14 06:33:11,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2022-07-14 06:33:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-07-14 06:33:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:33:11,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:11,878 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, 1, 1, 1] [2022-07-14 06:33:11,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-14 06:33:12,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:12,086 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:33:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1073352938, now seen corresponding path program 1 times [2022-07-14 06:33:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:12,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252418715] [2022-07-14 06:33:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:12,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:12,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:12,088 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) [2022-07-14 06:33:12,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 06:33:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:12,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:33:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:12,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:12,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:12,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252418715] [2022-07-14 06:33:12,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252418715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:12,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:12,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:33:12,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534595567] [2022-07-14 06:33:12,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:12,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:33:12,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:12,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:33:12,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:33:12,245 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:33:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:12,376 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-07-14 06:33:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:33:12,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-07-14 06:33:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:12,377 INFO L225 Difference]: With dead ends: 75 [2022-07-14 06:33:12,377 INFO L226 Difference]: Without dead ends: 75 [2022-07-14 06:33:12,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:33:12,378 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 36 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:12,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 140 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:33:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-14 06:33:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-14 06:33:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 64 states have internal predecessors, (65), 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) [2022-07-14 06:33:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-07-14 06:33:12,380 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 49 [2022-07-14 06:33:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:12,380 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-07-14 06:33:12,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:33:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-07-14 06:33:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:33:12,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:12,381 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, 1, 1, 1] [2022-07-14 06:33:12,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:12,589 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:33:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:12,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1073352939, now seen corresponding path program 1 times [2022-07-14 06:33:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:12,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622700875] [2022-07-14 06:33:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:12,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:12,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:12,591 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) [2022-07-14 06:33:12,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-14 06:33:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:12,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:33:12,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:12,954 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 [2022-07-14 06:33:12,956 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 [2022-07-14 06:33:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:13,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:14,220 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:33:14,222 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 [2022-07-14 06:33:16,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:33:16,743 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 32 treesize of output 34 [2022-07-14 06:33:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:19,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:19,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622700875] [2022-07-14 06:33:19,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622700875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:33:19,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:33:19,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-14 06:33:19,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201882150] [2022-07-14 06:33:19,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:33:19,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:33:19,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:19,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:33:19,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:33:19,236 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 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) [2022-07-14 06:33:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:22,856 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-07-14 06:33:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:33:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 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 49 [2022-07-14 06:33:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:22,858 INFO L225 Difference]: With dead ends: 85 [2022-07-14 06:33:22,858 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 06:33:22,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:33:22,859 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 88 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:22,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 427 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 571 Invalid, 0 Unknown, 192 Unchecked, 2.0s Time] [2022-07-14 06:33:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 06:33:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-07-14 06:33:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 69 states have internal predecessors, (71), 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) [2022-07-14 06:33:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-07-14 06:33:22,861 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 49 [2022-07-14 06:33:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:22,861 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-07-14 06:33:22,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 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) [2022-07-14 06:33:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-07-14 06:33:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:33:22,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:22,862 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, 1, 1, 1] [2022-07-14 06:33:22,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:23,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:23,071 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:33:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:23,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1073250912, now seen corresponding path program 1 times [2022-07-14 06:33:23,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:23,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825040997] [2022-07-14 06:33:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:23,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:23,073 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:33:23,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 06:33:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 06:33:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:23,389 INFO L356 Elim1Store]: treesize reduction 9, result has 67.9 percent of original size [2022-07-14 06:33:23,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2022-07-14 06:33:23,467 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 [2022-07-14 06:33:23,592 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 33 treesize of output 21 [2022-07-14 06:33:23,728 INFO L356 Elim1Store]: treesize reduction 9, result has 67.9 percent of original size [2022-07-14 06:33:23,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2022-07-14 06:33:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:25,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:31,296 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 48 treesize of output 44 [2022-07-14 06:33:31,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:31,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825040997] [2022-07-14 06:33:31,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825040997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:33:31,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [484712445] [2022-07-14 06:33:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:31,438 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:33:31,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:33:31,439 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:33:31,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-14 06:33:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:33:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:31,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:33:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:32,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:32,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:32,473 INFO L356 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2022-07-14 06:33:32,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2022-07-14 06:33:32,485 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:33:32,485 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 7 [2022-07-14 06:33:32,692 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 [2022-07-14 06:33:32,715 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:33:32,716 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 7 [2022-07-14 06:33:32,943 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 40 treesize of output 24 [2022-07-14 06:33:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:33,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:33,268 INFO L356 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2022-07-14 06:33:33,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2022-07-14 06:33:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:38,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:38,348 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 48 treesize of output 44 [2022-07-14 06:33:38,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [484712445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:33:38,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:33:38,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2022-07-14 06:33:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555288051] [2022-07-14 06:33:38,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:33:38,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:33:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:33:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1364, Unknown=4, NotChecked=0, Total=1482 [2022-07-14 06:33:38,492 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 32 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:33:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:38,762 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-07-14 06:33:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:33:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 49 [2022-07-14 06:33:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:38,764 INFO L225 Difference]: With dead ends: 84 [2022-07-14 06:33:38,764 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 06:33:38,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=138, Invalid=1750, Unknown=4, NotChecked=0, Total=1892 [2022-07-14 06:33:38,765 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:38,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 648 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 346 Unchecked, 0.1s Time] [2022-07-14 06:33:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 06:33:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-14 06:33:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 69 states have internal predecessors, (70), 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) [2022-07-14 06:33:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-07-14 06:33:38,767 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 49 [2022-07-14 06:33:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:38,768 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-07-14 06:33:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:33:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-07-14 06:33:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:33:38,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:38,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-07-14 06:33:38,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-14 06:33:38,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:39,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:33:39,178 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-07-14 06:33:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash 225896062, now seen corresponding path program 1 times [2022-07-14 06:33:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:39,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274053212] [2022-07-14 06:33:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:39,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:39,180 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:33:39,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-14 06:33:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-14 06:33:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:39,426 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 [2022-07-14 06:33:39,431 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 [2022-07-14 06:33:39,452 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 [2022-07-14 06:33:39,462 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 [2022-07-14 06:33:39,556 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:33:39,556 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 [2022-07-14 06:33:39,571 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:39,571 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 [2022-07-14 06:33:39,674 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 [2022-07-14 06:33:39,981 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 [2022-07-14 06:33:40,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:40,060 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 [2022-07-14 06:33:40,080 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 [2022-07-14 06:33:40,107 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:33:40,107 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 [2022-07-14 06:33:40,343 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 43 treesize of output 35 [2022-07-14 06:33:40,482 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 30 treesize of output 18 [2022-07-14 06:33:40,648 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:33:40,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 21 [2022-07-14 06:33:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:41,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:42,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:42,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274053212] [2022-07-14 06:33:42,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274053212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:33:42,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1719099331] [2022-07-14 06:33:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:42,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:33:42,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:33:42,484 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:33:42,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-07-14 06:33:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-14 06:33:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:42,884 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 [2022-07-14 06:33:42,975 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 [2022-07-14 06:33:43,261 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:33:43,261 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 [2022-07-14 06:33:43,626 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:33:43,626 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 7 [2022-07-14 06:33:44,359 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 [2022-07-14 06:33:44,823 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-14 06:33:44,824 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 [2022-07-14 06:33:44,991 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:33:44,991 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 [2022-07-14 06:33:45,411 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:33:45,411 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 30 treesize of output 18 [2022-07-14 06:33:46,704 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:33:46,704 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 19 treesize of output 10 [2022-07-14 06:33:47,144 INFO L356 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-07-14 06:33:47,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 24 [2022-07-14 06:33:47,536 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 [2022-07-14 06:33:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:47,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:33:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:48,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:51,094 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 10 treesize of output 8 [2022-07-14 06:33:52,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1719099331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:33:52,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:33:52,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 33] total 58 [2022-07-14 06:33:52,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219940440] [2022-07-14 06:33:52,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:33:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-14 06:33:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-14 06:33:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=4991, Unknown=0, NotChecked=0, Total=5256 [2022-07-14 06:33:52,214 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 58 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 48 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:33:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:57,155 INFO L93 Difference]: Finished difference Result 49 states and 48 transitions. [2022-07-14 06:33:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:33:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 48 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 52 [2022-07-14 06:33:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:57,155 INFO L225 Difference]: With dead ends: 49 [2022-07-14 06:33:57,155 INFO L226 Difference]: Without dead ends: 0 [2022-07-14 06:33:57,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=505, Invalid=9797, Unknown=0, NotChecked=0, Total=10302 [2022-07-14 06:33:57,157 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:57,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 451 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 317 Unchecked, 0.0s Time] [2022-07-14 06:33:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-14 06:33:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-14 06:33:57,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:33:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-14 06:33:57,158 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2022-07-14 06:33:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:57,159 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 06:33:57,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 48 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:33:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-14 06:33:57,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-14 06:33:57,161 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 28 remaining) [2022-07-14 06:33:57,161 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 28 remaining) [2022-07-14 06:33:57,161 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 28 remaining) [2022-07-14 06:33:57,161 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 28 remaining) [2022-07-14 06:33:57,161 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 28 remaining) [2022-07-14 06:33:57,161 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (21 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (20 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (19 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (16 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 28 remaining) [2022-07-14 06:33:57,162 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 28 remaining) [2022-07-14 06:33:57,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 28 remaining) [2022-07-14 06:33:57,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-07-14 06:33:57,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-14 06:33:57,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:57,566 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, 1, 1] [2022-07-14 06:33:57,568 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-14 06:33:57,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 06:33:57 BoogieIcfgContainer [2022-07-14 06:33:57,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-14 06:33:57,570 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 06:33:57,570 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 06:33:57,570 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 06:33:57,571 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:32:34" (3/4) ... [2022-07-14 06:33:57,572 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-14 06:33:57,576 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_list_add [2022-07-14 06:33:57,576 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_malloc [2022-07-14 06:33:57,577 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_list_del [2022-07-14 06:33:57,577 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __ldv_list_add [2022-07-14 06:33:57,580 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-07-14 06:33:57,580 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-07-14 06:33:57,580 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-14 06:33:57,616 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-14 06:33:57,616 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 06:33:57,617 INFO L158 Benchmark]: Toolchain (without parser) took 83769.71ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 41.4MB in the beginning and 53.0MB in the end (delta: -11.6MB). Peak memory consumption was 42.6MB. Max. memory is 16.1GB. [2022-07-14 06:33:57,617 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 43.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:33:57,617 INFO L158 Benchmark]: CACSL2BoogieTranslator took 474.75ms. Allocated memory is still 62.9MB. Free memory was 41.2MB in the beginning and 27.6MB in the end (delta: 13.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-14 06:33:57,618 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.80ms. Allocated memory is still 62.9MB. Free memory was 27.6MB in the beginning and 44.8MB in the end (delta: -17.1MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2022-07-14 06:33:57,618 INFO L158 Benchmark]: Boogie Preprocessor took 29.54ms. Allocated memory is still 62.9MB. Free memory was 44.8MB in the beginning and 42.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:33:57,618 INFO L158 Benchmark]: RCFGBuilder took 558.42ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 42.7MB in the beginning and 58.6MB in the end (delta: -16.0MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2022-07-14 06:33:57,618 INFO L158 Benchmark]: TraceAbstraction took 82598.73ms. Allocated memory is still 79.7MB. Free memory was 58.3MB in the beginning and 21.1MB in the end (delta: 37.2MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2022-07-14 06:33:57,618 INFO L158 Benchmark]: Witness Printer took 46.39ms. Allocated memory is still 79.7MB. Free memory was 21.1MB in the beginning and 53.0MB in the end (delta: -31.8MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2022-07-14 06:33:57,619 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 43.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 474.75ms. Allocated memory is still 62.9MB. Free memory was 41.2MB in the beginning and 27.6MB in the end (delta: 13.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.80ms. Allocated memory is still 62.9MB. Free memory was 27.6MB in the beginning and 44.8MB in the end (delta: -17.1MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.54ms. Allocated memory is still 62.9MB. Free memory was 44.8MB in the beginning and 42.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 558.42ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 42.7MB in the beginning and 58.6MB in the end (delta: -16.0MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * TraceAbstraction took 82598.73ms. Allocated memory is still 79.7MB. Free memory was 58.3MB in the beginning and 21.1MB in the end (delta: 37.2MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. * Witness Printer took 46.39ms. Allocated memory is still 79.7MB. Free memory was 21.1MB in the beginning and 53.0MB in the end (delta: -31.8MB). Peak memory consumption was 7.0MB. 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 772]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 772]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 772]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 780]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 78 locations, 28 error locations. Started 1 CEGAR loops. OverallTime: 82.5s, OverallIterations: 34, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 20.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1486 SdHoareTripleChecker+Valid, 8.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1449 mSDsluCounter, 10340 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3494 IncrementalHoareTripleChecker+Unchecked, 8638 mSDsCounter, 153 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5571 IncrementalHoareTripleChecker+Invalid, 9218 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 153 mSolverCounterUnsat, 1702 mSDtfsCounter, 5571 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1252 GetRequests, 654 SyntacticMatches, 20 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 48.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=7, InterpolantAutomatonStates: 462, 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, 34 MinimizatonAttempts, 260 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 50.7s InterpolantComputationTime, 1003 NumberOfCodeBlocks, 1003 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1015 ConstructedInterpolants, 395 QuantifiedInterpolants, 16732 SizeOfPredicates, 593 NumberOfNonLiveVariables, 5659 ConjunctsInSsa, 1188 ConjunctsInUnsatCore, 37 InterpolantComputations, 31 PerfectInterpolantSequences, 11/28 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 - AllSpecificationsHoldResult: All specifications hold 28 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-14 06:33:57,675 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: TRUE