./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c 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_test11.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 d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:49:14,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:49:14,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:49:15,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:49:15,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:49:15,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:49:15,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:49:15,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:49:15,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:49:15,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:49:15,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:49:15,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:49:15,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:49:15,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:49:15,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:49:15,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:49:15,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:49:15,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:49:15,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:49:15,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:49:15,045 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:49:15,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:49:15,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:49:15,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:49:15,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:49:15,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:49:15,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:49:15,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:49:15,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:49:15,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:49:15,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:49:15,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:49:15,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:49:15,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:49:15,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:49:15,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:49:15,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:49:15,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:49:15,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:49:15,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:49:15,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:49:15,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:49:15,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:49:15,082 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:49:15,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:49:15,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:49:15,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:49:15,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:49:15,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:49:15,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:49:15,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:49:15,085 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:49:15,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:49:15,085 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:49:15,086 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:49:15,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:49:15,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:49:15,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:49:15,086 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:49:15,086 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:49:15,086 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:49:15,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:49:15,087 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:49:15,087 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:49:15,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:49:15,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:49:15,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:49:15,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:49:15,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:49:15,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:49:15,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:49:15,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:49:15,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:49:15,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc [2022-07-12 18:49:15,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:49:15,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:49:15,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:49:15,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:49:15,269 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:49:15,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-12 18:49:15,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e8dee1d/0d043a2994584f24b2aa04b513490c83/FLAGf8bee09db [2022-07-12 18:49:15,734 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:49:15,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-12 18:49:15,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e8dee1d/0d043a2994584f24b2aa04b513490c83/FLAGf8bee09db [2022-07-12 18:49:16,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e8dee1d/0d043a2994584f24b2aa04b513490c83 [2022-07-12 18:49:16,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:49:16,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:49:16,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:16,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:49:16,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:49:16,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:16" (1/1) ... [2022-07-12 18:49:16,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b663404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:16, skipping insertion in model container [2022-07-12 18:49:16,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:16" (1/1) ... [2022-07-12 18:49:16,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:49:16,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:49:16,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:16,518 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) [2022-07-12 18:49:16,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f5b318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:16, skipping insertion in model container [2022-07-12 18:49:16,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:16,520 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:49:16,521 INFO L158 Benchmark]: Toolchain (without parser) took 390.70ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.3MB in the beginning and 77.1MB in the end (delta: -25.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 18:49:16,522 INFO L158 Benchmark]: CDTParser took 4.31ms. Allocated memory is still 86.0MB. Free memory was 39.6MB in the beginning and 56.9MB in the end (delta: -17.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-07-12 18:49:16,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 389.10ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.0MB in the beginning and 77.1MB in the end (delta: -26.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 18:49:16,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 4.31ms. Allocated memory is still 86.0MB. Free memory was 39.6MB in the beginning and 56.9MB in the end (delta: -17.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 389.10ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.0MB in the beginning and 77.1MB in the end (delta: -26.1MB). Peak memory consumption was 8.4MB. 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_test11.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 d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:49:17,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:49:17,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:49:17,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:49:17,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:49:17,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:49:17,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:49:17,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:49:17,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:49:17,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:49:17,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:49:17,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:49:17,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:49:17,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:49:17,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:49:17,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:49:17,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:49:17,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:49:17,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:49:17,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:49:17,988 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:49:17,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:49:17,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:49:17,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:49:17,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:49:17,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:49:18,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:49:18,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:49:18,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:49:18,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:49:18,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:49:18,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:49:18,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:49:18,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:49:18,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:49:18,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:49:18,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:49:18,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:49:18,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:49:18,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:49:18,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:49:18,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:49:18,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:49:18,040 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:49:18,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:49:18,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:49:18,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:49:18,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:49:18,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:49:18,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:49:18,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:49:18,043 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:49:18,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:49:18,043 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:49:18,044 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:49:18,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:49:18,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:49:18,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:49:18,044 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:49:18,044 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:49:18,045 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:49:18,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:49:18,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:49:18,045 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:49:18,045 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:49:18,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:49:18,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:49:18,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:49:18,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:49:18,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:49:18,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:49:18,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:49:18,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:49:18,046 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:49:18,047 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:18,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:49:18,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc [2022-07-12 18:49:18,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:49:18,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:49:18,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:49:18,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:49:18,309 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:49:18,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-12 18:49:18,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d88adebb/6ad9b379e5364332a1f8524f9342f634/FLAGc8c85c1f2 [2022-07-12 18:49:18,767 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:49:18,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-12 18:49:18,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d88adebb/6ad9b379e5364332a1f8524f9342f634/FLAGc8c85c1f2 [2022-07-12 18:49:18,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d88adebb/6ad9b379e5364332a1f8524f9342f634 [2022-07-12 18:49:18,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:49:18,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:49:18,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:18,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:49:18,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:49:18,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6160d992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18, skipping insertion in model container [2022-07-12 18:49:18,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:49:18,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:49:19,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:19,163 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:49:19,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:49:19,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:19,223 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:49:19,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:19,311 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:49:19,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19 WrapperNode [2022-07-12 18:49:19,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:19,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:49:19,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:49:19,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:49:19,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,369 INFO L137 Inliner]: procedures = 169, calls = 87, calls flagged for inlining = 26, calls inlined = 8, statements flattened = 92 [2022-07-12 18:49:19,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:49:19,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:49:19,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:49:19,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:49:19,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:49:19,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:49:19,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:49:19,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:49:19,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (1/1) ... [2022-07-12 18:49:19,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:49:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:19,444 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) [2022-07-12 18:49:19,446 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 [2022-07-12 18:49:19,475 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 18:49:19,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 18:49:19,475 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2022-07-12 18:49:19,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2022-07-12 18:49:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:49:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:49:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:49:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:49:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:49:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:49:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:49:19,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:49:19,589 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:49:19,599 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:49:19,776 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:49:19,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:49:19,781 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 18:49:19,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:49:19 BoogieIcfgContainer [2022-07-12 18:49:19,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:49:19,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:49:19,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:49:19,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:49:19,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:49:18" (1/3) ... [2022-07-12 18:49:19,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372068e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:49:19, skipping insertion in model container [2022-07-12 18:49:19,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:19" (2/3) ... [2022-07-12 18:49:19,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372068e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:49:19, skipping insertion in model container [2022-07-12 18:49:19,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:49:19" (3/3) ... [2022-07-12 18:49:19,791 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11.i [2022-07-12 18:49:19,801 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:49:19,802 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-07-12 18:49:19,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:49:19,856 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@4c0c3991, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1737e0fb [2022-07-12 18:49:19,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2022-07-12 18:49:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:49:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:49:19,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:19,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:19,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1738627509, now seen corresponding path program 1 times [2022-07-12 18:49:19,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:19,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025346744] [2022-07-12 18:49:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:19,880 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) [2022-07-12 18:49:19,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:49:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:49:19,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:20,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:20,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:20,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025346744] [2022-07-12 18:49:20,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025346744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:20,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:20,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:20,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652958587] [2022-07-12 18:49:20,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:20,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:49:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:49:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:20,040 INFO L87 Difference]: Start difference. First operand has 85 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2022-07-12 18:49:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:20,141 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2022-07-12 18:49:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:49:20,143 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 [2022-07-12 18:49:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:20,149 INFO L225 Difference]: With dead ends: 157 [2022-07-12 18:49:20,149 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 18:49:20,151 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 [2022-07-12 18:49:20,153 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 68 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:20,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 350 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:49:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 18:49:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 87. [2022-07-12 18:49:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 77 states have internal predecessors, (83), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-12 18:49:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2022-07-12 18:49:20,181 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 11 [2022-07-12 18:49:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:20,181 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2022-07-12 18:49:20,182 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) [2022-07-12 18:49:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2022-07-12 18:49:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:49:20,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:20,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:20,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:20,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash -851123828, now seen corresponding path program 1 times [2022-07-12 18:49:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102653938] [2022-07-12 18:49:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:20,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:20,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:20,392 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) [2022-07-12 18:49:20,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:49:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:49:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:20,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:20,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102653938] [2022-07-12 18:49:20,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102653938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:20,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:20,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:49:20,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576966703] [2022-07-12 18:49:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:20,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:49:20,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:49:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:49:20,460 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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) [2022-07-12 18:49:20,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:20,600 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2022-07-12 18:49:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:49:20,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 [2022-07-12 18:49:20,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:20,602 INFO L225 Difference]: With dead ends: 153 [2022-07-12 18:49:20,602 INFO L226 Difference]: Without dead ends: 151 [2022-07-12 18:49:20,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:49:20,603 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 66 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:20,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 304 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:49:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-12 18:49:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 83. [2022-07-12 18:49:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 74 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:49:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-07-12 18:49:20,610 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 11 [2022-07-12 18:49:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:20,610 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-07-12 18:49:20,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) 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) [2022-07-12 18:49:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-07-12 18:49:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:49:20,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:20,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:20,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:20,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:20,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash -470294884, now seen corresponding path program 1 times [2022-07-12 18:49:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:20,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708666882] [2022-07-12 18:49:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:20,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:20,822 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) [2022-07-12 18:49:20,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:49:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:20,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:49:20,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:20,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:20,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:20,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708666882] [2022-07-12 18:49:20,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708666882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:20,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:20,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:20,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50206870] [2022-07-12 18:49:20,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:20,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:49:20,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:49:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:20,897 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:49:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:20,949 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2022-07-12 18:49:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:49:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-12 18:49:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:20,951 INFO L225 Difference]: With dead ends: 150 [2022-07-12 18:49:20,951 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 18:49:20,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:20,952 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 63 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:20,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 444 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:49:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 18:49:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 87. [2022-07-12 18:49:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.607843137254902) internal successors, (82), 77 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-12 18:49:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2022-07-12 18:49:20,958 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 17 [2022-07-12 18:49:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:20,959 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2022-07-12 18:49:20,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:49:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2022-07-12 18:49:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:49:20,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:20,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:20,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:21,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:21,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash -470294895, now seen corresponding path program 1 times [2022-07-12 18:49:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790615078] [2022-07-12 18:49:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:21,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:21,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:21,170 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) [2022-07-12 18:49:21,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:49:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:49:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:21,233 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 [2022-07-12 18:49:21,304 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:49:21,305 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 18 treesize of output 25 [2022-07-12 18:49:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:21,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:23,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:23,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790615078] [2022-07-12 18:49:23,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790615078] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:23,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:23,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-12 18:49:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068204772] [2022-07-12 18:49:23,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:23,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:49:23,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:49:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2022-07-12 18:49:23,446 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:49:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:23,592 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-07-12 18:49:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:49:23,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2022-07-12 18:49:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:23,593 INFO L225 Difference]: With dead ends: 107 [2022-07-12 18:49:23,593 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 18:49:23,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-12 18:49:23,594 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:23,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 313 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-07-12 18:49:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 18:49:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-07-12 18:49:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 90 states have internal predecessors, (101), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-12 18:49:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2022-07-12 18:49:23,600 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 17 [2022-07-12 18:49:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:23,600 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2022-07-12 18:49:23,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:49:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2022-07-12 18:49:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:49:23,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:23,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:23,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:23,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:23,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -470294894, now seen corresponding path program 1 times [2022-07-12 18:49:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275329709] [2022-07-12 18:49:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:23,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:23,809 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) [2022-07-12 18:49:23,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:49:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:49:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:23,882 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 [2022-07-12 18:49:23,887 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 [2022-07-12 18:49:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:26,023 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 [2022-07-12 18:49:26,031 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:26,032 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 12 treesize of output 12 [2022-07-12 18:49:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:26,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:28,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:28,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275329709] [2022-07-12 18:49:28,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275329709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:28,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1871168969] [2022-07-12 18:49:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:28,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:49:28,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:49:28,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-07-12 18:49:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:49:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:28,323 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 [2022-07-12 18:49:28,327 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 [2022-07-12 18:49:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:28,402 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 [2022-07-12 18:49:28,411 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:28,412 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 12 treesize of output 12 [2022-07-12 18:49:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:28,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:30,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1871168969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:30,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:30,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 18:49:30,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324039379] [2022-07-12 18:49:30,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:30,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:49:30,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:49:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-12 18:49:30,599 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:31,059 INFO L93 Difference]: Finished difference Result 179 states and 200 transitions. [2022-07-12 18:49:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:49:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-12 18:49:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:31,060 INFO L225 Difference]: With dead ends: 179 [2022-07-12 18:49:31,060 INFO L226 Difference]: Without dead ends: 179 [2022-07-12 18:49:31,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2022-07-12 18:49:31,061 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 139 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:31,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 560 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 391 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-07-12 18:49:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-12 18:49:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2022-07-12 18:49:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 95 states have (on average 1.5894736842105264) internal successors, (151), 120 states have internal predecessors, (151), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-12 18:49:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2022-07-12 18:49:31,068 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 17 [2022-07-12 18:49:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:31,068 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2022-07-12 18:49:31,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2022-07-12 18:49:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:49:31,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:31,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:31,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-07-12 18:49:31,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-12 18:49:31,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:31,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:31,471 INFO L85 PathProgramCache]: Analyzing trace with hash -763697902, now seen corresponding path program 1 times [2022-07-12 18:49:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:31,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020205082] [2022-07-12 18:49:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:31,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:31,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:31,473 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) [2022-07-12 18:49:31,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:49:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:49:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:31,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:31,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020205082] [2022-07-12 18:49:31,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020205082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:31,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:31,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:31,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976561155] [2022-07-12 18:49:31,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:31,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:49:31,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:49:31,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:31,542 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:31,569 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2022-07-12 18:49:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:49:31,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-12 18:49:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:31,570 INFO L225 Difference]: With dead ends: 129 [2022-07-12 18:49:31,570 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:49:31,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:31,571 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:31,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 354 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:49:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:49:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-12 18:49:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 88 states have (on average 1.6022727272727273) internal successors, (141), 112 states have internal predecessors, (141), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-12 18:49:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-07-12 18:49:31,576 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 17 [2022-07-12 18:49:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:31,576 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-07-12 18:49:31,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-07-12 18:49:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:49:31,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:31,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:31,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:31,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:31,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash -806735705, now seen corresponding path program 1 times [2022-07-12 18:49:31,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:31,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474428136] [2022-07-12 18:49:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:31,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:31,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:31,787 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) [2022-07-12 18:49:31,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:49:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:49:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:31,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:32,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:32,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474428136] [2022-07-12 18:49:32,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474428136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:32,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:32,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:49:32,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478023894] [2022-07-12 18:49:32,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:32,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:49:32,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:32,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:49:32,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:49:32,015 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-07-12 18:49:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:32,137 INFO L93 Difference]: Finished difference Result 126 states and 161 transitions. [2022-07-12 18:49:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:49:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 18 [2022-07-12 18:49:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:32,139 INFO L225 Difference]: With dead ends: 126 [2022-07-12 18:49:32,139 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 18:49:32,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:49:32,140 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 138 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:32,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 274 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-07-12 18:49:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 18:49:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-12 18:49:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 88 states have (on average 1.5795454545454546) internal successors, (139), 111 states have internal predecessors, (139), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-12 18:49:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2022-07-12 18:49:32,144 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 18 [2022-07-12 18:49:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:32,144 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2022-07-12 18:49:32,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-07-12 18:49:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2022-07-12 18:49:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:49:32,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:32,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:32,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:32,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:32,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1173731936, now seen corresponding path program 1 times [2022-07-12 18:49:32,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106332034] [2022-07-12 18:49:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:32,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:32,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:32,353 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) [2022-07-12 18:49:32,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:49:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:32,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:49:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:32,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:36,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:36,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106332034] [2022-07-12 18:49:36,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106332034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:36,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803702726] [2022-07-12 18:49:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:36,624 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:49:36,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:49:36,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-07-12 18:49:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:49:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:36,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:40,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1803702726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:40,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:40,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-12 18:49:40,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43838348] [2022-07-12 18:49:40,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:40,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:49:40,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:49:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-12 18:49:40,950 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:49:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:41,074 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2022-07-12 18:49:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:49:41,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-07-12 18:49:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:41,075 INFO L225 Difference]: With dead ends: 135 [2022-07-12 18:49:41,075 INFO L226 Difference]: Without dead ends: 128 [2022-07-12 18:49:41,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-12 18:49:41,076 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 14 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:41,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 519 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 164 Unchecked, 0.1s Time] [2022-07-12 18:49:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-12 18:49:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-07-12 18:49:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 85 states have (on average 1.588235294117647) internal successors, (135), 108 states have internal predecessors, (135), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-12 18:49:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-07-12 18:49:41,084 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 21 [2022-07-12 18:49:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:41,084 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-07-12 18:49:41,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:49:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-07-12 18:49:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:49:41,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:41,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:41,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:41,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:41,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:41,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash -624729604, now seen corresponding path program 1 times [2022-07-12 18:49:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:41,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037358962] [2022-07-12 18:49:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:41,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:41,492 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) [2022-07-12 18:49:41,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:49:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:49:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:41,548 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 [2022-07-12 18:49:41,596 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:49:41,597 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 [2022-07-12 18:49:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:41,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:41,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037358962] [2022-07-12 18:49:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037358962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:41,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:41,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-12 18:49:41,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579435970] [2022-07-12 18:49:41,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:41,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:49:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:49:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:49:41,738 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:49:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:41,847 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2022-07-12 18:49:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:49:41,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-12 18:49:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:41,849 INFO L225 Difference]: With dead ends: 150 [2022-07-12 18:49:41,849 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 18:49:41,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:49:41,849 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 19 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:41,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 285 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-07-12 18:49:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 18:49:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-07-12 18:49:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 105 states have (on average 1.561904761904762) internal successors, (164), 128 states have internal predecessors, (164), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-12 18:49:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-07-12 18:49:41,853 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 25 [2022-07-12 18:49:41,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:41,853 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-07-12 18:49:41,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:49:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-07-12 18:49:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:49:41,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:41,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:41,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:42,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:42,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash -624729603, now seen corresponding path program 1 times [2022-07-12 18:49:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:42,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446682433] [2022-07-12 18:49:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:42,057 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) [2022-07-12 18:49:42,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:49:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:49:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:42,146 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 [2022-07-12 18:49:46,255 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:49:46,256 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 14 [2022-07-12 18:49:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:49:46,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:46,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446682433] [2022-07-12 18:49:46,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446682433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [700942524] [2022-07-12 18:49:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:46,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:49:46,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:49:46,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-12 18:49:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:49:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:46,616 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 [2022-07-12 18:49:46,620 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 [2022-07-12 18:49:48,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:48,783 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 [2022-07-12 18:49:48,791 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:48,791 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 12 treesize of output 12 [2022-07-12 18:49:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:49:48,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:53,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [700942524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:53,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:53,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-12 18:49:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147397326] [2022-07-12 18:49:53,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:53,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:49:53,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:49:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=226, Unknown=3, NotChecked=0, Total=272 [2022-07-12 18:49:53,425 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:49:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:55,814 INFO L93 Difference]: Finished difference Result 242 states and 309 transitions. [2022-07-12 18:49:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:49:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-07-12 18:49:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:55,816 INFO L225 Difference]: With dead ends: 242 [2022-07-12 18:49:55,816 INFO L226 Difference]: Without dead ends: 242 [2022-07-12 18:49:55,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=56, Invalid=282, Unknown=4, NotChecked=0, Total=342 [2022-07-12 18:49:55,817 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 113 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:55,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 659 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 374 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2022-07-12 18:49:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-12 18:49:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 201. [2022-07-12 18:49:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.5686274509803921) internal successors, (240), 176 states have internal predecessors, (240), 16 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (23), 19 states have call predecessors, (23), 16 states have call successors, (23) [2022-07-12 18:49:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 279 transitions. [2022-07-12 18:49:55,821 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 279 transitions. Word has length 25 [2022-07-12 18:49:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:55,821 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 279 transitions. [2022-07-12 18:49:55,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:49:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 279 transitions. [2022-07-12 18:49:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:49:55,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:55,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:55,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-07-12 18:49:56,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:56,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:56,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1130288229, now seen corresponding path program 1 times [2022-07-12 18:49:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:56,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174120885] [2022-07-12 18:49:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:56,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:56,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:56,229 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) [2022-07-12 18:49:56,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:49:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:49:56,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:56,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:56,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:56,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174120885] [2022-07-12 18:49:56,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174120885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:56,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:56,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:56,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016267395] [2022-07-12 18:49:56,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:56,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:49:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:49:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:56,345 INFO L87 Difference]: Start difference. First operand 201 states and 279 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-12 18:49:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:56,369 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-07-12 18:49:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:49:56,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 [2022-07-12 18:49:56,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:56,371 INFO L225 Difference]: With dead ends: 158 [2022-07-12 18:49:56,371 INFO L226 Difference]: Without dead ends: 154 [2022-07-12 18:49:56,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:56,371 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:56,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 336 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:49:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-12 18:49:56,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-07-12 18:49:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 135 states have internal predecessors, (173), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-12 18:49:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2022-07-12 18:49:56,380 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 25 [2022-07-12 18:49:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:56,380 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2022-07-12 18:49:56,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-12 18:49:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2022-07-12 18:49:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:49:56,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:56,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:56,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:56,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:56,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:56,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2108218693, now seen corresponding path program 1 times [2022-07-12 18:49:56,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:56,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145438911] [2022-07-12 18:49:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:56,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:56,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:56,591 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) [2022-07-12 18:49:56,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:49:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:49:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:49:56,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:56,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:56,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145438911] [2022-07-12 18:49:56,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145438911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:56,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:56,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757052913] [2022-07-12 18:49:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:56,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:49:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:49:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:56,662 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:49:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:56,699 INFO L93 Difference]: Finished difference Result 198 states and 240 transitions. [2022-07-12 18:49:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:49:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-12 18:49:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:56,701 INFO L225 Difference]: With dead ends: 198 [2022-07-12 18:49:56,701 INFO L226 Difference]: Without dead ends: 198 [2022-07-12 18:49:56,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:56,701 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 53 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:56,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 422 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:49:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-12 18:49:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 151. [2022-07-12 18:49:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.5135135135135136) internal successors, (168), 132 states have internal predecessors, (168), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-12 18:49:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2022-07-12 18:49:56,708 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 26 [2022-07-12 18:49:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:56,709 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2022-07-12 18:49:56,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:49:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2022-07-12 18:49:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:49:56,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:56,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:56,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:56,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:56,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1299244922, now seen corresponding path program 1 times [2022-07-12 18:49:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:56,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19811298] [2022-07-12 18:49:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:56,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:56,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:56,922 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) [2022-07-12 18:49:56,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:49:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:49:56,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:49:57,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:49:57,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:57,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19811298] [2022-07-12 18:49:57,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19811298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:57,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:57,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:49:57,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728246651] [2022-07-12 18:49:57,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:57,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:49:57,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:49:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:49:57,268 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:49:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:57,317 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2022-07-12 18:49:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:49:57,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-07-12 18:49:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:57,319 INFO L225 Difference]: With dead ends: 172 [2022-07-12 18:49:57,319 INFO L226 Difference]: Without dead ends: 172 [2022-07-12 18:49:57,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:49:57,319 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 61 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:57,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 494 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 90 Unchecked, 0.0s Time] [2022-07-12 18:49:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-12 18:49:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2022-07-12 18:49:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.5043478260869565) internal successors, (173), 136 states have internal predecessors, (173), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-12 18:49:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2022-07-12 18:49:57,322 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 26 [2022-07-12 18:49:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:57,323 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2022-07-12 18:49:57,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:49:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2022-07-12 18:49:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:49:57,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:57,323 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:57,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:57,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:57,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash 930272189, now seen corresponding path program 1 times [2022-07-12 18:49:57,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:57,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936451659] [2022-07-12 18:49:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:57,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:57,525 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) [2022-07-12 18:49:57,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:49:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:49:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:57,630 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:49:57,630 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 [2022-07-12 18:49:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:49:57,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:57,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936451659] [2022-07-12 18:49:57,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936451659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:57,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:57,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409500869] [2022-07-12 18:49:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:57,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:49:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:49:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:49:57,647 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:49:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:57,778 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2022-07-12 18:49:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:49:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-12 18:49:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:57,779 INFO L225 Difference]: With dead ends: 173 [2022-07-12 18:49:57,779 INFO L226 Difference]: Without dead ends: 173 [2022-07-12 18:49:57,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:49:57,780 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 82 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:57,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 300 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-07-12 18:49:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-12 18:49:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-07-12 18:49:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 115 states have (on average 1.4869565217391305) internal successors, (171), 135 states have internal predecessors, (171), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-12 18:49:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 196 transitions. [2022-07-12 18:49:57,786 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 196 transitions. Word has length 27 [2022-07-12 18:49:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:57,786 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 196 transitions. [2022-07-12 18:49:57,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:49:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 196 transitions. [2022-07-12 18:49:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:49:57,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:57,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:57,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:57,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:57,995 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:49:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 930272190, now seen corresponding path program 1 times [2022-07-12 18:49:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:57,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572364395] [2022-07-12 18:49:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:57,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:57,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:57,997 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) [2022-07-12 18:49:57,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:49:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 18:49:58,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:58,096 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 [2022-07-12 18:49:58,100 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 [2022-07-12 18:50:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:00,206 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 [2022-07-12 18:50:00,213 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:00,213 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 12 treesize of output 12 [2022-07-12 18:50:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:00,275 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 [2022-07-12 18:50:00,282 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:00,282 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 12 treesize of output 12 [2022-07-12 18:50:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:50:00,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:03,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572364395] [2022-07-12 18:50:03,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572364395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91760070] [2022-07-12 18:50:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:03,100 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:03,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:03,101 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:50:03,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-12 18:50:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:50:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:03,235 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 [2022-07-12 18:50:03,240 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 [2022-07-12 18:50:03,347 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:50:03,347 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 [2022-07-12 18:50:03,362 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:03,362 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 12 treesize of output 12 [2022-07-12 18:50:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:03,459 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 [2022-07-12 18:50:03,466 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:03,466 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 12 treesize of output 12 [2022-07-12 18:50:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:50:03,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:04,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91760070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:04,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:04,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2022-07-12 18:50:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304097055] [2022-07-12 18:50:04,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:50:04,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:50:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2022-07-12 18:50:04,549 INFO L87 Difference]: Start difference. First operand 155 states and 196 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:50:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:07,094 INFO L93 Difference]: Finished difference Result 198 states and 217 transitions. [2022-07-12 18:50:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:50:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-07-12 18:50:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:07,100 INFO L225 Difference]: With dead ends: 198 [2022-07-12 18:50:07,100 INFO L226 Difference]: Without dead ends: 198 [2022-07-12 18:50:07,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=60, Invalid=280, Unknown=2, NotChecked=0, Total=342 [2022-07-12 18:50:07,101 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 152 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:07,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 748 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 515 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-07-12 18:50:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-12 18:50:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 126. [2022-07-12 18:50:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 109 states have internal predecessors, (130), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-12 18:50:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2022-07-12 18:50:07,103 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 27 [2022-07-12 18:50:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:07,104 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2022-07-12 18:50:07,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:50:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2022-07-12 18:50:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:50:07,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:07,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:50:07,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-07-12 18:50:07,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-12 18:50:07,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:07,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:50:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 638376382, now seen corresponding path program 1 times [2022-07-12 18:50:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:07,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151061374] [2022-07-12 18:50:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:07,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:07,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:07,509 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) [2022-07-12 18:50:07,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 18:50:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 18:50:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:07,652 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 [2022-07-12 18:50:07,669 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 [2022-07-12 18:50:07,757 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-12 18:50:07,757 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-07-12 18:50:07,838 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:50:07,839 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 47 treesize of output 38 [2022-07-12 18:50:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:50:07,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:08,031 INFO L356 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-07-12 18:50:08,031 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 67 treesize of output 66 [2022-07-12 18:50:08,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151061374] [2022-07-12 18:50:08,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151061374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118139368] [2022-07-12 18:50:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:08,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:08,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:08,079 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:50:08,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-07-12 18:50:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:50:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:08,237 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 [2022-07-12 18:50:08,371 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:08,371 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 12 treesize of output 12 [2022-07-12 18:50:08,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:50:10,482 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_18| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_18|) (_ bv0 32))))) is different from true [2022-07-12 18:50:10,544 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:50:10,545 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-12 18:50:10,614 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 25 treesize of output 13 [2022-07-12 18:50:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-12 18:50:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:10,650 INFO L356 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-07-12 18:50:10,650 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 21 treesize of output 20 [2022-07-12 18:50:10,654 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_252 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_252) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) is different from false [2022-07-12 18:50:10,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [118139368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:10,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:10,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-12 18:50:10,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918965106] [2022-07-12 18:50:10,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:10,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:50:10,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:50:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=783, Unknown=2, NotChecked=114, Total=992 [2022-07-12 18:50:10,674 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 21 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:50:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:20,429 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2022-07-12 18:50:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:50:20,429 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 21 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-07-12 18:50:20,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:20,430 INFO L225 Difference]: With dead ends: 181 [2022-07-12 18:50:20,430 INFO L226 Difference]: Without dead ends: 181 [2022-07-12 18:50:20,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=356, Invalid=2000, Unknown=4, NotChecked=190, Total=2550 [2022-07-12 18:50:20,431 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 397 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:20,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1087 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1156 Invalid, 0 Unknown, 144 Unchecked, 0.9s Time] [2022-07-12 18:50:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-12 18:50:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 95. [2022-07-12 18:50:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 82 states have internal predecessors, (87), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:50:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2022-07-12 18:50:20,433 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 29 [2022-07-12 18:50:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:20,434 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2022-07-12 18:50:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 21 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:50:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2022-07-12 18:50:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:50:20,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:20,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:50:20,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:20,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:20,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:20,835 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:50:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash 638376383, now seen corresponding path program 1 times [2022-07-12 18:50:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:20,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116362229] [2022-07-12 18:50:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:20,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:20,837 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) [2022-07-12 18:50:20,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 18:50:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:50:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:20,925 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 [2022-07-12 18:50:20,972 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:20,972 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 12 treesize of output 12 [2022-07-12 18:50:21,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:50:21,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:50:21,150 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:50:21,150 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-12 18:50:21,154 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 18 treesize of output 20 [2022-07-12 18:50:21,235 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 25 treesize of output 13 [2022-07-12 18:50:21,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 [2022-07-12 18:50:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:50:21,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:21,523 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:50:21,523 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 50 treesize of output 54 [2022-07-12 18:50:21,577 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_277 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_277) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset|))) (forall ((v_prenex_6 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_6) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (or (forall ((v_ArrVal_276 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_276) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (forall ((v_ArrVal_277 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_277) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (_ bv0 32))))) is different from false [2022-07-12 18:50:21,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:21,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116362229] [2022-07-12 18:50:21,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116362229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:21,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772758269] [2022-07-12 18:50:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:21,627 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:21,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:21,628 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:50:21,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-12 18:50:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 18:50:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:21,766 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 [2022-07-12 18:50:21,908 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 [2022-07-12 18:50:23,978 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:50:23,978 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 18 treesize of output 25 [2022-07-12 18:50:24,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:50:24,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:50:24,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 9 treesize of output 3 [2022-07-12 18:50:24,169 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 16 treesize of output 8 [2022-07-12 18:50:28,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:28,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-12 18:50:28,397 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:50:28,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:50:28,532 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:50:28,533 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-12 18:50:28,536 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 18 treesize of output 20 [2022-07-12 18:50:28,634 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 [2022-07-12 18:50:28,637 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 25 treesize of output 13 [2022-07-12 18:50:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:50:28,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:28,789 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_304 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_305 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_304) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_305) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) (forall ((v_ArrVal_304 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_304) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2022-07-12 18:50:28,895 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((|v_ldv_malloc_#res.base_89| (_ BitVec 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_89|))))) (forall ((v_ArrVal_304 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_304) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) (forall ((|v_ldv_malloc_#res.base_89| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_89|)))) (forall ((v_ArrVal_308 (_ BitVec 32)) (v_ArrVal_304 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_305 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_304) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (select (store |c_#length| |v_ldv_malloc_#res.base_89| v_ArrVal_308) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_305) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))))))) is different from false [2022-07-12 18:50:28,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772758269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:28,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:28,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2022-07-12 18:50:28,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427938914] [2022-07-12 18:50:28,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:28,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:50:28,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:50:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1013, Unknown=5, NotChecked=198, Total=1332 [2022-07-12 18:50:28,902 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:50:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:34,150 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-07-12 18:50:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:50:34,151 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-07-12 18:50:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:34,151 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:50:34,151 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:50:34,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=253, Invalid=1733, Unknown=6, NotChecked=264, Total=2256 [2022-07-12 18:50:34,152 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 136 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:34,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 730 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 717 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-07-12 18:50:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:50:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2022-07-12 18:50:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.303030303030303) internal successors, (86), 81 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:50:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2022-07-12 18:50:34,154 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 29 [2022-07-12 18:50:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:34,155 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2022-07-12 18:50:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:50:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2022-07-12 18:50:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:50:34,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:34,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-12 18:50:34,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:34,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:34,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:34,558 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:50:34,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:34,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1844886222, now seen corresponding path program 1 times [2022-07-12 18:50:34,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:34,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680780782] [2022-07-12 18:50:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:34,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:34,560 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) [2022-07-12 18:50:34,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:50:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:50:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:50:36,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:39,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680780782] [2022-07-12 18:50:39,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680780782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801423994] [2022-07-12 18:50:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:39,076 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:39,078 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:50:39,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-12 18:50:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:39,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:50:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:50:53,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:58,005 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 13 treesize of output 11 [2022-07-12 18:51:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [801423994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:00,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:51:00,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2022-07-12 18:51:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65688896] [2022-07-12 18:51:00,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:51:00,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:51:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:00,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:51:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=784, Unknown=10, NotChecked=0, Total=930 [2022-07-12 18:51:00,332 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:00,487 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2022-07-12 18:51:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:51:00,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2022-07-12 18:51:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:00,488 INFO L225 Difference]: With dead ends: 99 [2022-07-12 18:51:00,489 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:51:00,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=145, Invalid=901, Unknown=10, NotChecked=0, Total=1056 [2022-07-12 18:51:00,490 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 13 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:00,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 477 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 216 Unchecked, 0.1s Time] [2022-07-12 18:51:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:51:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-07-12 18:51:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 72 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-07-12 18:51:00,493 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 32 [2022-07-12 18:51:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:00,493 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-07-12 18:51:00,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-07-12 18:51:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 18:51:00,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:00,494 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:00,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:00,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:00,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:51:00,903 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:51:00,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash -316571990, now seen corresponding path program 1 times [2022-07-12 18:51:00,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:00,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849282007] [2022-07-12 18:51:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:00,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:00,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:00,905 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) [2022-07-12 18:51:00,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:51:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:01,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:51:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:01,014 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 [2022-07-12 18:51:01,049 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:01,049 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 12 treesize of output 12 [2022-07-12 18:51:01,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:51:01,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:51:03,101 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17|)))) is different from true [2022-07-12 18:51:03,107 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 [2022-07-12 18:51:07,235 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-12 18:51:07,235 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-07-12 18:51:07,238 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 31 treesize of output 33 [2022-07-12 18:51:07,302 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 28 treesize of output 20 [2022-07-12 18:51:07,386 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:51:07,387 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 36 treesize of output 19 [2022-07-12 18:51:09,515 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:51:09,515 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 15 treesize of output 20 [2022-07-12 18:51:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-12 18:51:09,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:18,191 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 110 treesize of output 77 [2022-07-12 18:51:18,203 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret45#1.base_34| (_ BitVec 32)) (v_ArrVal_375 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret45#1.base_34| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_34|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_375) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) is different from false [2022-07-12 18:51:18,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849282007] [2022-07-12 18:51:18,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849282007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [180730001] [2022-07-12 18:51:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:18,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:51:18,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:51:18,207 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:51:18,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-12 18:51:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 18:51:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:18,359 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 [2022-07-12 18:51:20,544 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:20,544 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 12 treesize of output 12 [2022-07-12 18:51:20,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:51:20,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:51:22,786 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 [2022-07-12 18:51:23,035 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-12 18:51:23,035 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-07-12 18:51:23,038 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 38 treesize of output 38 [2022-07-12 18:51:23,158 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 35 treesize of output 23 [2022-07-12 18:51:23,293 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:51:23,294 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 36 treesize of output 19 [2022-07-12 18:51:27,415 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:51:27,415 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 21 treesize of output 28 [2022-07-12 18:51:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:51:27,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:29,812 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 110 treesize of output 77 [2022-07-12 18:51:29,823 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret45#1.base_37| (_ BitVec 32)) (v_ArrVal_375 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret45#1.base_37| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_37|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_375) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) is different from false [2022-07-12 18:51:29,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [180730001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:29,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:51:29,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2022-07-12 18:51:29,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057751912] [2022-07-12 18:51:29,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:51:29,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 18:51:29,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:29,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 18:51:29,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1647, Unknown=30, NotChecked=252, Total=2070 [2022-07-12 18:51:29,826 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-12 18:51:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:44,734 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2022-07-12 18:51:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:51:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2022-07-12 18:51:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:44,735 INFO L225 Difference]: With dead ends: 124 [2022-07-12 18:51:44,735 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 18:51:44,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=228, Invalid=2200, Unknown=34, NotChecked=294, Total=2756 [2022-07-12 18:51:44,736 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 55 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:44,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 827 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 622 Invalid, 0 Unknown, 459 Unchecked, 0.4s Time] [2022-07-12 18:51:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 18:51:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2022-07-12 18:51:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 84 states have internal predecessors, (90), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:51:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-07-12 18:51:44,738 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 38 [2022-07-12 18:51:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:44,738 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-07-12 18:51:44,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-12 18:51:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-07-12 18:51:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 18:51:44,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:44,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:44,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:44,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:45,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:45,139 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:51:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash -316571989, now seen corresponding path program 1 times [2022-07-12 18:51:45,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330830449] [2022-07-12 18:51:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:45,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:45,141 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) [2022-07-12 18:51:45,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 18:51:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:51:45,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:45,269 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 [2022-07-12 18:51:45,305 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:45,305 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 12 treesize of output 12 [2022-07-12 18:51:45,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:51:45,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:51:47,357 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_34| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_34|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_20|) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_34|))) is different from true [2022-07-12 18:51:49,388 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 [2022-07-12 18:51:49,395 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 [2022-07-12 18:51:51,574 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-12 18:51:51,574 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-07-12 18:51:51,578 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-07-12 18:51:51,802 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 18:51:51,802 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 91 treesize of output 46 [2022-07-12 18:51:51,807 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 23 treesize of output 10 [2022-07-12 18:51:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:54,035 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 [2022-07-12 18:51:54,041 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:54,041 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 15 [2022-07-12 18:51:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-12 18:51:54,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:00,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:00,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330830449] [2022-07-12 18:52:00,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330830449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:00,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1668138980] [2022-07-12 18:52:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:00,389 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:00,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:52:00,391 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:52:00,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-12 18:52:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:00,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 18:52:00,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:00,576 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 [2022-07-12 18:52:00,744 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:00,744 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 12 treesize of output 12 [2022-07-12 18:52:00,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:52:00,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:52:03,069 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 [2022-07-12 18:52:03,078 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 [2022-07-12 18:52:03,428 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-12 18:52:03,429 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-07-12 18:52:03,432 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 54 [2022-07-12 18:52:03,849 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:52:03,849 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 91 treesize of output 46 [2022-07-12 18:52:03,852 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 [2022-07-12 18:52:05,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:05,971 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 [2022-07-12 18:52:05,978 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:05,978 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 15 [2022-07-12 18:52:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:05,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1668138980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:12,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:12,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2022-07-12 18:52:12,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189145187] [2022-07-12 18:52:12,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 18:52:12,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 18:52:12,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1510, Unknown=5, NotChecked=78, Total=1722 [2022-07-12 18:52:12,432 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:19,627 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2022-07-12 18:52:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:52:19,627 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2022-07-12 18:52:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:19,628 INFO L225 Difference]: With dead ends: 163 [2022-07-12 18:52:19,628 INFO L226 Difference]: Without dead ends: 163 [2022-07-12 18:52:19,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=211, Invalid=2138, Unknown=7, NotChecked=94, Total=2450 [2022-07-12 18:52:19,629 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 120 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:19,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1288 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 707 Invalid, 0 Unknown, 414 Unchecked, 0.6s Time] [2022-07-12 18:52:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-12 18:52:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 98. [2022-07-12 18:52:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.289855072463768) internal successors, (89), 84 states have internal predecessors, (89), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2022-07-12 18:52:19,633 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 38 [2022-07-12 18:52:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:19,633 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2022-07-12 18:52:19,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2022-07-12 18:52:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 18:52:19,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:19,633 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:19,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-07-12 18:52:19,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:20,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,043 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:20,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1161043861, now seen corresponding path program 1 times [2022-07-12 18:52:20,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:20,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028865091] [2022-07-12 18:52:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:20,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:20,045 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) [2022-07-12 18:52:20,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 18:52:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:20,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:52:20,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:52:20,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:20,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:20,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028865091] [2022-07-12 18:52:20,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028865091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:20,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:20,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:52:20,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69157162] [2022-07-12 18:52:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:20,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:52:20,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:20,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:52:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:20,177 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:52:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:20,196 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-07-12 18:52:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:52:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-07-12 18:52:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:20,197 INFO L225 Difference]: With dead ends: 88 [2022-07-12 18:52:20,197 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 18:52:20,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:20,198 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:20,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:52:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 18:52:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-07-12 18:52:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.280701754385965) internal successors, (73), 70 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:52:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-07-12 18:52:20,200 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 38 [2022-07-12 18:52:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:20,200 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-07-12 18:52:20,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:52:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-07-12 18:52:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:52:20,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:20,201 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:20,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-12 18:52:20,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,408 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 717010680, now seen corresponding path program 1 times [2022-07-12 18:52:20,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:20,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876718717] [2022-07-12 18:52:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:20,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:20,409 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) [2022-07-12 18:52:20,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 18:52:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:20,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:52:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:20,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:20,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:20,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876718717] [2022-07-12 18:52:20,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876718717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:20,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:20,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:52:20,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272780089] [2022-07-12 18:52:20,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:52:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:52:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:20,535 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:52:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:20,566 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-07-12 18:52:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:52:20,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-07-12 18:52:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:20,567 INFO L225 Difference]: With dead ends: 122 [2022-07-12 18:52:20,567 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 18:52:20,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:20,569 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 36 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:20,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 382 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:52:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 18:52:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2022-07-12 18:52:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-07-12 18:52:20,590 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 40 [2022-07-12 18:52:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:20,590 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-07-12 18:52:20,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:52:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-07-12 18:52:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:52:20,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:20,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:20,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:20,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,803 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1835146281, now seen corresponding path program 1 times [2022-07-12 18:52:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:20,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113698675] [2022-07-12 18:52:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:20,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:20,805 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) [2022-07-12 18:52:20,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 18:52:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:52:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:52:20,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:20,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113698675] [2022-07-12 18:52:20,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113698675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:20,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:20,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:52:20,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623627348] [2022-07-12 18:52:20,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:20,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:52:20,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:52:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:52:20,925 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:52:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:21,095 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-07-12 18:52:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:52:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-07-12 18:52:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:21,097 INFO L225 Difference]: With dead ends: 116 [2022-07-12 18:52:21,097 INFO L226 Difference]: Without dead ends: 116 [2022-07-12 18:52:21,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:52:21,097 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 46 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:21,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 254 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:52:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-12 18:52:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2022-07-12 18:52:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 79 states have internal predecessors, (82), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-12 18:52:21,099 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 40 [2022-07-12 18:52:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:21,100 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-12 18:52:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:52:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-12 18:52:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:52:21,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:21,100 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:21,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-12 18:52:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:21,301 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1835146280, now seen corresponding path program 1 times [2022-07-12 18:52:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:21,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356045551] [2022-07-12 18:52:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:21,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:21,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:21,302 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) [2022-07-12 18:52:21,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 18:52:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:52:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:21,411 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 [2022-07-12 18:52:21,414 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 [2022-07-12 18:52:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:23,532 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 [2022-07-12 18:52:23,544 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:23,544 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 12 treesize of output 12 [2022-07-12 18:52:23,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:23,627 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 [2022-07-12 18:52:23,634 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:23,634 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 12 treesize of output 12 [2022-07-12 18:52:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:52:23,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:26,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:26,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356045551] [2022-07-12 18:52:26,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356045551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:26,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1080267513] [2022-07-12 18:52:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:26,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:26,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:52:26,693 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) [2022-07-12 18:52:26,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-12 18:52:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 18:52:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:26,889 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 [2022-07-12 18:52:26,893 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 [2022-07-12 18:52:26,982 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:52:26,983 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 [2022-07-12 18:52:26,993 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:26,993 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 12 treesize of output 12 [2022-07-12 18:52:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:27,081 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 [2022-07-12 18:52:27,088 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:27,088 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 12 treesize of output 12 [2022-07-12 18:52:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:52:27,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1080267513] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:31,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:31,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2022-07-12 18:52:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287079015] [2022-07-12 18:52:31,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:52:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:52:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=367, Unknown=1, NotChecked=0, Total=420 [2022-07-12 18:52:31,846 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:32,317 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2022-07-12 18:52:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:52:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-07-12 18:52:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:32,319 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:52:32,319 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:52:32,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=87, Invalid=562, Unknown=1, NotChecked=0, Total=650 [2022-07-12 18:52:32,320 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 105 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:32,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 578 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-07-12 18:52:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:52:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2022-07-12 18:52:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 79 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-07-12 18:52:32,323 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 40 [2022-07-12 18:52:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:32,323 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-07-12 18:52:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-07-12 18:52:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:52:32,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:32,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:32,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:32,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:32,728 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 [2022-07-12 18:52:32,728 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 752121782, now seen corresponding path program 1 times [2022-07-12 18:52:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:32,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154999768] [2022-07-12 18:52:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:32,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:32,730 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) [2022-07-12 18:52:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-12 18:52:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:32,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:52:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:32,856 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 [2022-07-12 18:52:32,894 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:52:32,895 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 [2022-07-12 18:52:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:52:32,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:32,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:32,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154999768] [2022-07-12 18:52:32,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154999768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:32,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:32,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:52:32,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350777990] [2022-07-12 18:52:32,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:32,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:52:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:52:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:52:32,920 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:52:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:33,040 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2022-07-12 18:52:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:52:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-07-12 18:52:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:33,041 INFO L225 Difference]: With dead ends: 99 [2022-07-12 18:52:33,041 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 18:52:33,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:52:33,041 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 44 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:33,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 247 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-07-12 18:52:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 18:52:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-07-12 18:52:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 78 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-07-12 18:52:33,043 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 41 [2022-07-12 18:52:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:33,043 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-07-12 18:52:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:52:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-07-12 18:52:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:52:33,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:33,044 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:33,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-12 18:52:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:33,244 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 752121783, now seen corresponding path program 1 times [2022-07-12 18:52:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002037348] [2022-07-12 18:52:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:33,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:33,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:33,246 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:33,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 18:52:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 18:52:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:33,386 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 [2022-07-12 18:52:33,391 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 [2022-07-12 18:52:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:35,499 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 [2022-07-12 18:52:35,506 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:35,506 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 12 treesize of output 12 [2022-07-12 18:52:35,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:35,578 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 [2022-07-12 18:52:35,584 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:35,584 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 12 treesize of output 12 [2022-07-12 18:52:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:37,684 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 [2022-07-12 18:52:37,690 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:37,690 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 12 treesize of output 12 [2022-07-12 18:52:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:52:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:38,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002037348] [2022-07-12 18:52:38,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002037348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:38,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [59758702] [2022-07-12 18:52:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:38,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:38,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:52:38,190 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:52:38,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-12 18:52:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 18:52:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:38,399 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 [2022-07-12 18:52:38,402 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 [2022-07-12 18:52:38,480 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:38,480 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 12 treesize of output 12 [2022-07-12 18:52:38,487 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 [2022-07-12 18:52:38,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:38,575 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 [2022-07-12 18:52:38,582 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:38,583 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 12 treesize of output 12 [2022-07-12 18:52:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:40,656 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 [2022-07-12 18:52:40,662 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:40,662 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 12 treesize of output 12 [2022-07-12 18:52:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:52:40,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:40,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [59758702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:40,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:40,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2022-07-12 18:52:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319228465] [2022-07-12 18:52:40,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:40,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:52:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:52:40,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=297, Unknown=1, NotChecked=0, Total=342 [2022-07-12 18:52:40,873 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:43,365 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2022-07-12 18:52:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:52:43,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-07-12 18:52:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:43,366 INFO L225 Difference]: With dead ends: 132 [2022-07-12 18:52:43,366 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 18:52:43,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=80, Invalid=518, Unknown=2, NotChecked=0, Total=600 [2022-07-12 18:52:43,367 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 164 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:43,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 449 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 369 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-07-12 18:52:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 18:52:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 91. [2022-07-12 18:52:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 77 states have internal predecessors, (79), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-07-12 18:52:43,369 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 41 [2022-07-12 18:52:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:43,369 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-07-12 18:52:43,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-07-12 18:52:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:52:43,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:43,369 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:43,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:43,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:43,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:43,782 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1833421355, now seen corresponding path program 1 times [2022-07-12 18:52:43,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:43,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336930886] [2022-07-12 18:52:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:43,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:43,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:43,784 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:43,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-12 18:52:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:52:43,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:52:44,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:44,424 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:44,424 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 24 treesize of output 28 [2022-07-12 18:52:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:44,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336930886] [2022-07-12 18:52:44,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336930886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:44,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:44,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-12 18:52:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318880994] [2022-07-12 18:52:44,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:44,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:52:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:52:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:52:44,751 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-12 18:52:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:45,176 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-07-12 18:52:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:52:45,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 46 [2022-07-12 18:52:45,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:45,178 INFO L225 Difference]: With dead ends: 90 [2022-07-12 18:52:45,178 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 18:52:45,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:52:45,178 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 231 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:45,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 385 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:52:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 18:52:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-12 18:52:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.2) internal successors, (78), 76 states have internal predecessors, (78), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-07-12 18:52:45,180 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 46 [2022-07-12 18:52:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:45,180 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-07-12 18:52:45,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-12 18:52:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-07-12 18:52:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:52:45,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:45,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:45,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:45,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:45,381 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1833421356, now seen corresponding path program 1 times [2022-07-12 18:52:45,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:45,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745123245] [2022-07-12 18:52:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:45,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:45,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:45,383 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:45,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-12 18:52:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:45,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:52:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:52:45,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:45,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745123245] [2022-07-12 18:52:45,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745123245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:45,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:45,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:52:45,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96537516] [2022-07-12 18:52:45,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:45,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:52:45,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:45,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:52:45,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:52:45,576 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:45,707 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2022-07-12 18:52:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:52:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-07-12 18:52:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:45,708 INFO L225 Difference]: With dead ends: 133 [2022-07-12 18:52:45,708 INFO L226 Difference]: Without dead ends: 133 [2022-07-12 18:52:45,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:45,708 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:45,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 252 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-07-12 18:52:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-12 18:52:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2022-07-12 18:52:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.196969696969697) internal successors, (79), 76 states have internal predecessors, (79), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-07-12 18:52:45,710 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 46 [2022-07-12 18:52:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:45,710 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-07-12 18:52:45,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-07-12 18:52:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:52:45,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:45,710 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:45,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:45,911 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1963012722, now seen corresponding path program 1 times [2022-07-12 18:52:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292540366] [2022-07-12 18:52:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:45,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:45,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:45,913 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:45,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-12 18:52:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:46,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:52:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 18:52:46,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:46,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292540366] [2022-07-12 18:52:46,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292540366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:46,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:46,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:52:46,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690413531] [2022-07-12 18:52:46,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:52:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:52:46,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:52:46,044 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:46,161 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-07-12 18:52:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:52:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-07-12 18:52:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:46,162 INFO L225 Difference]: With dead ends: 96 [2022-07-12 18:52:46,162 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 18:52:46,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:46,171 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 81 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:46,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 235 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:52:46,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 18:52:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2022-07-12 18:52:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.1875) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-07-12 18:52:46,174 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 47 [2022-07-12 18:52:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:46,176 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-07-12 18:52:46,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-07-12 18:52:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 18:52:46,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:46,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:46,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:46,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:46,379 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:46,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1021505201, now seen corresponding path program 1 times [2022-07-12 18:52:46,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:46,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144252389] [2022-07-12 18:52:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:46,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:46,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:46,381 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:46,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-12 18:52:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:46,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:52:46,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:46,593 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 [2022-07-12 18:52:46,598 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 [2022-07-12 18:52:46,675 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 [2022-07-12 18:52:46,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:52:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:46,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:47,090 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 35 treesize of output 29 [2022-07-12 18:52:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:47,187 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 38 treesize of output 32 [2022-07-12 18:52:47,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:47,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 18:52:47,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:47,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144252389] [2022-07-12 18:52:47,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144252389] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:47,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:52:47,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 19 [2022-07-12 18:52:47,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021848594] [2022-07-12 18:52:47,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:47,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:52:47,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:52:47,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:52:47,272 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:47,737 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2022-07-12 18:52:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:52:47,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-07-12 18:52:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:47,738 INFO L225 Difference]: With dead ends: 131 [2022-07-12 18:52:47,738 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 18:52:47,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:52:47,739 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 202 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:47,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 503 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:52:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 18:52:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2022-07-12 18:52:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 79 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-12 18:52:47,741 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 51 [2022-07-12 18:52:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:47,741 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-12 18:52:47,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-12 18:52:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:52:47,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:47,741 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:47,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-12 18:52:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:47,942 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1703598893, now seen corresponding path program 1 times [2022-07-12 18:52:47,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289597321] [2022-07-12 18:52:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:47,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:47,943 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:47,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-12 18:52:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 18:52:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:48,196 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 [2022-07-12 18:52:48,255 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 [2022-07-12 18:52:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 18:52:48,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:48,483 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 38 treesize of output 32 [2022-07-12 18:52:48,555 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 38 treesize of output 32 [2022-07-12 18:52:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:48,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:48,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289597321] [2022-07-12 18:52:48,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289597321] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:48,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:52:48,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 22 [2022-07-12 18:52:48,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799664745] [2022-07-12 18:52:48,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:48,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:52:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:52:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:52:48,703 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:49,157 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-07-12 18:52:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:52:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-07-12 18:52:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:49,158 INFO L225 Difference]: With dead ends: 92 [2022-07-12 18:52:49,158 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 18:52:49,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:52:49,158 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 172 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:49,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 456 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:52:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 18:52:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-12 18:52:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 78 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-07-12 18:52:49,160 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 52 [2022-07-12 18:52:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:49,160 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-07-12 18:52:49,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-07-12 18:52:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:52:49,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:49,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:49,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:49,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:49,361 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1601898209, now seen corresponding path program 1 times [2022-07-12 18:52:49,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:49,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985734723] [2022-07-12 18:52:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:49,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:49,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:49,363 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:49,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-12 18:52:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:52:49,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:49,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:49,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985734723] [2022-07-12 18:52:49,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985734723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:49,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:49,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-12 18:52:49,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200828507] [2022-07-12 18:52:49,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:49,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:52:49,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:49,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:52:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:49,581 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:49,599 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-07-12 18:52:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:52:49,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-07-12 18:52:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:49,601 INFO L225 Difference]: With dead ends: 91 [2022-07-12 18:52:49,601 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:52:49,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:49,608 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 25 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:49,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 212 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:52:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:52:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-12 18:52:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-07-12 18:52:49,611 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 52 [2022-07-12 18:52:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:49,612 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-07-12 18:52:49,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-07-12 18:52:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:52:49,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:49,612 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:49,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:49,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:49,820 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1271958025, now seen corresponding path program 1 times [2022-07-12 18:52:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314052360] [2022-07-12 18:52:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:49,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:49,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:49,821 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:49,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-12 18:52:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 18:52:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:50,419 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 [2022-07-12 18:52:50,544 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 [2022-07-12 18:52:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:52:50,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:51,011 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 38 treesize of output 32 [2022-07-12 18:52:51,104 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 38 treesize of output 32 [2022-07-12 18:52:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:51,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:51,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314052360] [2022-07-12 18:52:51,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314052360] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:51,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:52:51,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 30 [2022-07-12 18:52:51,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476212789] [2022-07-12 18:52:51,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:51,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:52:51,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:51,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:52:51,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:52:51,355 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:52,364 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2022-07-12 18:52:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:52:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2022-07-12 18:52:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:52,365 INFO L225 Difference]: With dead ends: 140 [2022-07-12 18:52:52,365 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 18:52:52,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:52:52,366 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 216 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:52,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 536 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:52:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 18:52:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 102. [2022-07-12 18:52:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.1375) internal successors, (91), 87 states have internal predecessors, (91), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-07-12 18:52:52,367 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 53 [2022-07-12 18:52:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:52,368 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-07-12 18:52:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-07-12 18:52:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:52:52,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:52,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:52,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:52,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:52,569 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1880762957, now seen corresponding path program 1 times [2022-07-12 18:52:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:52,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586630836] [2022-07-12 18:52:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:52,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:52,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:52,571 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:52,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-12 18:52:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:52:52,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:52:53,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:53,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586630836] [2022-07-12 18:52:53,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586630836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:53,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:53,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:52:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598987624] [2022-07-12 18:52:53,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:53,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:52:53,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:52:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:53,162 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:52:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:53,180 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2022-07-12 18:52:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:52:53,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 53 [2022-07-12 18:52:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:53,182 INFO L225 Difference]: With dead ends: 105 [2022-07-12 18:52:53,182 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:52:53,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:53,182 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 32 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:53,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 267 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-07-12 18:52:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:52:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-12 18:52:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 90 states have internal predecessors, (94), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:52:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-12 18:52:53,184 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 53 [2022-07-12 18:52:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:53,184 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-12 18:52:53,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:52:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-12 18:52:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:52:53,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:53,185 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:53,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:53,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:53,385 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1060607112, now seen corresponding path program 1 times [2022-07-12 18:52:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:53,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369527768] [2022-07-12 18:52:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:53,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:53,387 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:53,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-12 18:52:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:52:53,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:53,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:53,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369527768] [2022-07-12 18:52:53,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369527768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:53,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:53,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:52:53,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223940141] [2022-07-12 18:52:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:53,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:52:53,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:52:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:53,541 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:53,557 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-07-12 18:52:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:52:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-07-12 18:52:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:53,574 INFO L225 Difference]: With dead ends: 107 [2022-07-12 18:52:53,574 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 18:52:53,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:52:53,575 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 24 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 266 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:52:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 18:52:53,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-07-12 18:52:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 79 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-12 18:52:53,577 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 53 [2022-07-12 18:52:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:53,578 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-12 18:52:53,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:52:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-12 18:52:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:52:53,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:53,579 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:53,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:53,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:53,787 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash -775746731, now seen corresponding path program 1 times [2022-07-12 18:52:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:53,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449072953] [2022-07-12 18:52:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:53,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:53,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:53,789 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:53,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-12 18:52:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 18:52:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:54,059 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 [2022-07-12 18:52:54,125 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 16 treesize of output 8 [2022-07-12 18:52:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 18:52:54,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:54,358 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 34 [2022-07-12 18:52:54,433 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 34 [2022-07-12 18:52:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:54,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:54,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449072953] [2022-07-12 18:52:54,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449072953] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:54,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:52:54,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 24 [2022-07-12 18:52:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474416691] [2022-07-12 18:52:54,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:52:54,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:54,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:52:54,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:52:54,591 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:55,109 INFO L93 Difference]: Finished difference Result 107 states and 106 transitions. [2022-07-12 18:52:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:52:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-07-12 18:52:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:55,110 INFO L225 Difference]: With dead ends: 107 [2022-07-12 18:52:55,110 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 18:52:55,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:52:55,110 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 184 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:55,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 590 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:52:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 18:52:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-07-12 18:52:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.095890410958904) internal successors, (80), 79 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-07-12 18:52:55,112 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 54 [2022-07-12 18:52:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:55,112 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-07-12 18:52:55,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-07-12 18:52:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:52:55,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:55,112 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:55,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:55,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:55,313 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:55,313 INFO L85 PathProgramCache]: Analyzing trace with hash -775993003, now seen corresponding path program 1 times [2022-07-12 18:52:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:55,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853724582] [2022-07-12 18:52:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:55,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:55,352 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:55,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-12 18:52:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 18:52:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:55,576 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 [2022-07-12 18:52:55,741 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 [2022-07-12 18:52:55,892 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 [2022-07-12 18:52:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 18:52:55,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:56,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2022-07-12 18:52:56,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:56,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853724582] [2022-07-12 18:52:56,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853724582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1978274489] [2022-07-12 18:52:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:56,252 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:56,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:52:56,253 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:52:56,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-07-12 18:52:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 18:52:56,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:56,526 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 [2022-07-12 18:52:56,574 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 [2022-07-12 18:52:56,602 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 [2022-07-12 18:52:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 18:52:56,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:56,794 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 42 [2022-07-12 18:52:56,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1978274489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:56,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:56,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2022-07-12 18:52:56,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127804458] [2022-07-12 18:52:56,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:56,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:52:56,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:52:56,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:52:56,846 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:52:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:57,331 INFO L93 Difference]: Finished difference Result 106 states and 105 transitions. [2022-07-12 18:52:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:52:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2022-07-12 18:52:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:57,332 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:52:57,332 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:52:57,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:52:57,333 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 114 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:57,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 551 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 404 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-07-12 18:52:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:52:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2022-07-12 18:52:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.082191780821918) internal successors, (79), 78 states have internal predecessors, (79), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-07-12 18:52:57,334 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 54 [2022-07-12 18:52:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:57,335 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-07-12 18:52:57,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:52:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-07-12 18:52:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:52:57,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:57,335 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:57,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:57,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-07-12 18:52:57,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:57,736 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1825890595, now seen corresponding path program 1 times [2022-07-12 18:52:57,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:57,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568873160] [2022-07-12 18:52:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:57,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:57,738 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:57,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-12 18:52:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:52:57,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:57,927 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 [2022-07-12 18:52:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:52:58,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:52:58,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568873160] [2022-07-12 18:52:58,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568873160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:58,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:58,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-12 18:52:58,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10807056] [2022-07-12 18:52:58,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:58,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:52:58,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:52:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:52:58,072 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 18:52:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:58,125 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-07-12 18:52:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:52:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-07-12 18:52:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:58,126 INFO L225 Difference]: With dead ends: 93 [2022-07-12 18:52:58,126 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 18:52:58,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:52:58,127 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 20 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:58,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 199 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-07-12 18:52:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 18:52:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-12 18:52:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 79 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-07-12 18:52:58,128 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 54 [2022-07-12 18:52:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:58,128 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-07-12 18:52:58,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 18:52:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-07-12 18:52:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:52:58,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:58,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:58,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:58,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:58,329 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1960758395, now seen corresponding path program 1 times [2022-07-12 18:52:58,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:58,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350093343] [2022-07-12 18:52:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:58,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:58,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:58,331 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:58,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-07-12 18:52:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:52:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:52:58,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:58,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350093343] [2022-07-12 18:52:58,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350093343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:58,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:58,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:52:58,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643436662] [2022-07-12 18:52:58,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:58,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:52:58,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:52:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:58,947 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:52:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:58,990 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-07-12 18:52:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:52:58,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 56 [2022-07-12 18:52:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:58,991 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:52:58,991 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:52:58,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:58,992 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 59 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:58,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 244 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 63 Unchecked, 0.0s Time] [2022-07-12 18:52:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:52:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-12 18:52:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-07-12 18:52:58,996 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 56 [2022-07-12 18:52:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:58,997 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-07-12 18:52:58,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:52:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-07-12 18:52:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 18:52:58,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:58,997 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:59,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:59,210 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:52:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2093454019, now seen corresponding path program 1 times [2022-07-12 18:52:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:59,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352553962] [2022-07-12 18:52:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:59,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:59,229 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:52:59,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-07-12 18:52:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:52:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:52:59,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:52:59,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:59,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352553962] [2022-07-12 18:52:59,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352553962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:59,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:59,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:52:59,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783779341] [2022-07-12 18:52:59,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:59,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:52:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:52:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:59,823 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:52:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:59,841 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-07-12 18:52:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:52:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 57 [2022-07-12 18:52:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:59,842 INFO L225 Difference]: With dead ends: 94 [2022-07-12 18:52:59,842 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 18:52:59,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:52:59,843 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 82 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:59,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 266 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-07-12 18:52:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 18:52:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-12 18:52:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 80 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:52:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-07-12 18:52:59,844 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 57 [2022-07-12 18:52:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:59,844 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-07-12 18:52:59,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:52:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-07-12 18:52:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 18:52:59,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:59,845 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:59,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:00,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:00,045 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:53:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:00,046 INFO L85 PathProgramCache]: Analyzing trace with hash -653967976, now seen corresponding path program 1 times [2022-07-12 18:53:00,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:00,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958769228] [2022-07-12 18:53:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:00,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:00,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:00,047 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:53:00,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-07-12 18:53:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:53:00,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:00,208 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 [2022-07-12 18:53:00,264 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:53:00,265 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 18 treesize of output 25 [2022-07-12 18:53:00,403 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 14 treesize of output 16 [2022-07-12 18:53:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:53:00,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:53:00,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958769228] [2022-07-12 18:53:00,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958769228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:00,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:00,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-07-12 18:53:00,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664345154] [2022-07-12 18:53:00,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:00,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:53:00,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:53:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:53:00,639 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 18:53:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:00,849 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-07-12 18:53:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:53:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 57 [2022-07-12 18:53:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:00,849 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:53:00,849 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:53:00,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:53:00,850 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:00,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 288 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 226 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-07-12 18:53:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:53:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-12 18:53:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:53:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-07-12 18:53:00,851 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 57 [2022-07-12 18:53:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:00,852 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-07-12 18:53:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 18:53:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-07-12 18:53:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 18:53:00,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:00,852 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:00,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:01,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:01,053 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:53:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:01,053 INFO L85 PathProgramCache]: Analyzing trace with hash -472565031, now seen corresponding path program 1 times [2022-07-12 18:53:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:01,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309991481] [2022-07-12 18:53:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:01,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:01,054 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:53:01,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-07-12 18:53:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:01,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:53:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:01,252 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 [2022-07-12 18:53:01,411 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:53:01,412 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 18 treesize of output 25 [2022-07-12 18:53:01,584 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 [2022-07-12 18:53:01,715 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 16 treesize of output 8 [2022-07-12 18:53:01,835 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 14 treesize of output 16 [2022-07-12 18:53:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:53:01,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:02,172 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 34 [2022-07-12 18:53:02,250 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 86 treesize of output 74 [2022-07-12 18:53:02,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309991481] [2022-07-12 18:53:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309991481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [646083237] [2022-07-12 18:53:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:02,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:53:02,510 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:53:02,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-07-12 18:53:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 18:53:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:02,836 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 [2022-07-12 18:53:02,979 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:02,980 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 12 treesize of output 12 [2022-07-12 18:53:03,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:53:03,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:53:05,191 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 [2022-07-12 18:53:05,440 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-12 18:53:05,440 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-07-12 18:53:05,443 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 33 treesize of output 33 [2022-07-12 18:53:05,616 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 [2022-07-12 18:53:05,819 INFO L356 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-07-12 18:53:05,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 20 [2022-07-12 18:53:06,023 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:06,024 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 15 [2022-07-12 18:53:06,216 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 [2022-07-12 18:53:06,252 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 16 treesize of output 8 [2022-07-12 18:53:06,303 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 14 treesize of output 16 [2022-07-12 18:53:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:53:06,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:06,585 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 40 treesize of output 34 [2022-07-12 18:53:06,611 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 86 treesize of output 74 [2022-07-12 18:53:06,695 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:53:06,695 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 36 [2022-07-12 18:53:06,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [646083237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:06,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:06,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 42 [2022-07-12 18:53:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714806266] [2022-07-12 18:53:06,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 18:53:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 18:53:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2518, Unknown=1, NotChecked=0, Total=2756 [2022-07-12 18:53:06,976 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-12 18:53:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:16,989 INFO L93 Difference]: Finished difference Result 101 states and 100 transitions. [2022-07-12 18:53:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 18:53:16,989 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 58 [2022-07-12 18:53:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:16,990 INFO L225 Difference]: With dead ends: 101 [2022-07-12 18:53:16,990 INFO L226 Difference]: Without dead ends: 101 [2022-07-12 18:53:16,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 107 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=492, Invalid=4906, Unknown=4, NotChecked=0, Total=5402 [2022-07-12 18:53:16,991 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 170 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:16,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 574 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1014 Invalid, 0 Unknown, 311 Unchecked, 0.8s Time] [2022-07-12 18:53:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-12 18:53:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2022-07-12 18:53:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.051948051948052) internal successors, (81), 80 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:53:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-07-12 18:53:16,993 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 58 [2022-07-12 18:53:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:16,993 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-07-12 18:53:16,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-12 18:53:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-07-12 18:53:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 18:53:16,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:16,993 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:17,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:17,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:17,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:17,400 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:53:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1131542459, now seen corresponding path program 1 times [2022-07-12 18:53:17,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75543183] [2022-07-12 18:53:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:17,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:17,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:17,402 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:53:17,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-07-12 18:53:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:17,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:53:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:53:17,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:53:18,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75543183] [2022-07-12 18:53:18,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75543183] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:18,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:18,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:53:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014445681] [2022-07-12 18:53:18,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:18,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:53:18,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:53:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:53:18,024 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:53:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:18,039 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-07-12 18:53:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:53:18,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 60 [2022-07-12 18:53:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:18,040 INFO L225 Difference]: With dead ends: 93 [2022-07-12 18:53:18,040 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 18:53:18,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:53:18,040 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 76 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:18,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 280 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2022-07-12 18:53:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 18:53:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-12 18:53:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 79 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:53:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-07-12 18:53:18,042 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 60 [2022-07-12 18:53:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:18,042 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-07-12 18:53:18,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 18:53:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-07-12 18:53:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 18:53:18,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:18,042 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:18,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:18,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:18,243 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:53:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:18,243 INFO L85 PathProgramCache]: Analyzing trace with hash -388191190, now seen corresponding path program 1 times [2022-07-12 18:53:18,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:18,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100308370] [2022-07-12 18:53:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:18,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:18,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:18,245 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:53:18,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-07-12 18:53:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:53:18,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:18,411 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 [2022-07-12 18:53:18,436 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:18,437 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 12 treesize of output 12 [2022-07-12 18:53:18,501 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:53:18,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-12 18:53:18,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:53:18,719 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 [2022-07-12 18:53:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:53:18,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:18,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:18,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100308370] [2022-07-12 18:53:18,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100308370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:18,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1621257820] [2022-07-12 18:53:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:18,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:18,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:53:18,998 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:53:18,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-07-12 18:53:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:53:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:19,299 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 [2022-07-12 18:53:19,311 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:19,311 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 12 treesize of output 12 [2022-07-12 18:53:19,326 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:19,326 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 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:53:19,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:53:19,536 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 [2022-07-12 18:53:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:53:19,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:19,794 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:53:19,794 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 23 treesize of output 27 [2022-07-12 18:53:19,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1621257820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:19,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:19,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2022-07-12 18:53:19,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749263976] [2022-07-12 18:53:19,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:19,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:53:19,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:53:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:53:19,858 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-12 18:53:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:20,038 INFO L93 Difference]: Finished difference Result 99 states and 98 transitions. [2022-07-12 18:53:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:53:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-07-12 18:53:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:20,039 INFO L225 Difference]: With dead ends: 99 [2022-07-12 18:53:20,039 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 18:53:20,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:53:20,039 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:20,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 308 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 244 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-12 18:53:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 18:53:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-12 18:53:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 80 states have (on average 1.0375) internal successors, (83), 82 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:53:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-07-12 18:53:20,041 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 60 [2022-07-12 18:53:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:20,042 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-07-12 18:53:20,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-12 18:53:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-07-12 18:53:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 18:53:20,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:20,042 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:20,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:20,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:20,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:20,451 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:53:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash 718077986, now seen corresponding path program 1 times [2022-07-12 18:53:20,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:20,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39248852] [2022-07-12 18:53:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:20,452 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:53:20,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-07-12 18:53:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 18:53:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:20,658 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 [2022-07-12 18:53:20,736 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:53:20,737 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 18 treesize of output 25 [2022-07-12 18:53:20,908 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:53:20,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2022-07-12 18:53:21,064 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 [2022-07-12 18:53:21,220 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 16 treesize of output 8 [2022-07-12 18:53:21,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-12 18:53:21,376 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 [2022-07-12 18:53:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:53:21,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:21,788 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 34 [2022-07-12 18:53:21,888 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 88 treesize of output 76 [2022-07-12 18:53:22,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:22,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39248852] [2022-07-12 18:53:22,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39248852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:22,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802459593] [2022-07-12 18:53:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:22,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:22,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:53:22,191 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:53:22,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-07-12 18:53:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 18:53:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:22,548 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 [2022-07-12 18:53:22,600 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:22,600 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 12 treesize of output 12 [2022-07-12 18:53:22,772 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:53:22,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2022-07-12 18:53:22,829 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 [2022-07-12 18:53:22,862 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 16 treesize of output 8 [2022-07-12 18:53:22,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-12 18:53:22,903 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 [2022-07-12 18:53:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:53:22,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:23,263 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 34 [2022-07-12 18:53:23,327 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 88 treesize of output 76 [2022-07-12 18:53:23,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802459593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:23,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:23,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 28 [2022-07-12 18:53:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225455994] [2022-07-12 18:53:23,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:53:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:53:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:53:23,531 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:53:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:24,308 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-07-12 18:53:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:53:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 61 [2022-07-12 18:53:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:24,308 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:53:24,308 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:53:24,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 128 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:53:24,309 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 143 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:24,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 380 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 545 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-07-12 18:53:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:53:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-12 18:53:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:53:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-07-12 18:53:24,311 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 61 [2022-07-12 18:53:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:24,311 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-07-12 18:53:24,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:53:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-07-12 18:53:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-12 18:53:24,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:24,311 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:24,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:24,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-07-12 18:53:24,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:24,716 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-12 18:53:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash 610425485, now seen corresponding path program 1 times [2022-07-12 18:53:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:24,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723021807] [2022-07-12 18:53:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:24,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:24,718 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:53:24,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-07-12 18:53:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:53:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:25,442 INFO L356 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2022-07-12 18:53:25,442 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 7 case distinctions, treesize of input 161 treesize of output 176 [2022-07-12 18:53:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 18:53:44,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:44,995 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 16 treesize of output 14 [2022-07-12 18:53:45,001 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 16 treesize of output 14 [2022-07-12 18:53:48,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:48,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723021807] [2022-07-12 18:53:48,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723021807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:48,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098978428] [2022-07-12 18:53:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:48,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:53:48,928 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:53:48,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-07-12 18:53:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 18:53:49,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:53,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:53:54,008 INFO L356 Elim1Store]: treesize reduction 19, result has 24.0 percent of original size [2022-07-12 18:53:54,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2022-07-12 18:53:54,471 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:53:54,472 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-12 18:53:54,475 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 [2022-07-12 18:53:55,258 INFO L356 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2022-07-12 18:53:55,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 81 treesize of output 85 [2022-07-12 18:53:55,436 INFO L356 Elim1Store]: treesize reduction 75, result has 42.3 percent of original size [2022-07-12 18:53:55,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 132 [2022-07-12 18:53:55,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 78 treesize of output 58 [2022-07-12 18:53:55,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-07-12 18:53:55,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-07-12 18:53:55,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 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