./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0019_1-2.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/list-ext-properties/test-0019_1-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:46:03,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:46:03,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:46:03,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:46:03,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:46:03,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:46:03,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:46:03,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:46:03,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:46:03,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:46:03,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:46:03,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:46:03,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:46:03,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:46:03,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:46:03,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:46:03,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:46:03,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:46:03,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:46:03,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:46:03,975 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:46:03,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:46:03,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:46:03,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:46:03,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:46:03,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:46:03,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:46:03,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:46:03,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:46:03,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:46:03,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:46:03,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:46:03,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:46:03,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:46:03,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:46:03,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:46:03,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:46:03,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:46:03,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:46:03,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:46:03,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:46:03,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:46:03,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:46:04,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:46:04,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:46:04,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:46:04,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:46:04,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:46:04,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:46:04,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:46:04,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:46:04,013 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:46:04,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:46:04,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:46:04,014 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:46:04,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:46:04,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:46:04,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:46:04,014 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:46:04,014 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:46:04,015 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:46:04,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:46:04,015 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:46:04,016 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:46:04,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:46:04,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:46:04,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:46:04,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:46:04,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:46:04,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:46:04,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:46:04,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:46:04,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:46:04,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 [2022-07-12 18:46:04,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:46:04,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:46:04,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:46:04,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:46:04,238 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:46:04,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2022-07-12 18:46:04,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad6591d7/8ae332580cf74f7fa70c765e36cec089/FLAG843e0240d [2022-07-12 18:46:04,715 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:46:04,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2022-07-12 18:46:04,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad6591d7/8ae332580cf74f7fa70c765e36cec089/FLAG843e0240d [2022-07-12 18:46:04,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad6591d7/8ae332580cf74f7fa70c765e36cec089 [2022-07-12 18:46:04,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:46:04,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:46:04,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:46:04,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:46:04,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:46:04,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:46:04" (1/1) ... [2022-07-12 18:46:04,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e2c3cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:04, skipping insertion in model container [2022-07-12 18:46:04,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:46:04" (1/1) ... [2022-07-12 18:46:04,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:46:04,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:46:05,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:46:05,022 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 18:46:05,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1dd26e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:05, skipping insertion in model container [2022-07-12 18:46:05,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:46:05,023 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:46:05,025 INFO L158 Benchmark]: Toolchain (without parser) took 289.02ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 71.5MB in the beginning and 108.7MB in the end (delta: -37.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:46:05,026 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory was 61.7MB in the beginning and 61.7MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:46:05,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.24ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 71.2MB in the beginning and 108.7MB in the end (delta: -37.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:46:05,029 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory was 61.7MB in the beginning and 61.7MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.24ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 71.2MB in the beginning and 108.7MB in the end (delta: -37.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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/list-ext-properties/test-0019_1-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:46:06,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:46:06,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:46:06,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:46:06,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:46:06,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:46:06,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:46:06,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:46:06,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:46:06,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:46:06,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:46:06,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:46:06,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:46:06,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:46:06,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:46:06,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:46:06,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:46:06,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:46:06,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:46:06,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:46:06,533 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:46:06,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:46:06,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:46:06,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:46:06,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:46:06,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:46:06,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:46:06,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:46:06,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:46:06,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:46:06,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:46:06,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:46:06,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:46:06,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:46:06,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:46:06,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:46:06,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:46:06,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:46:06,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:46:06,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:46:06,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:46:06,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:46:06,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:46:06,582 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:46:06,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:46:06,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:46:06,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:46:06,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:46:06,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:46:06,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:46:06,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:46:06,584 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:46:06,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:46:06,585 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:46:06,585 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:46:06,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:46:06,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:46:06,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:46:06,586 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:46:06,586 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:46:06,586 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:46:06,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:46:06,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:46:06,587 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:46:06,587 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:46:06,587 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:46:06,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:46:06,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:46:06,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:46:06,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:46:06,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:46:06,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:46:06,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:46:06,588 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:46:06,588 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:46:06,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:46:06,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 [2022-07-12 18:46:06,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:46:06,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:46:06,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:46:06,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:46:06,895 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:46:06,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2022-07-12 18:46:06,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb710ba11/259c0cba52bd43e6b5d4914fa66cbb32/FLAGbd9ad8dbf [2022-07-12 18:46:07,296 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:46:07,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2022-07-12 18:46:07,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb710ba11/259c0cba52bd43e6b5d4914fa66cbb32/FLAGbd9ad8dbf [2022-07-12 18:46:07,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb710ba11/259c0cba52bd43e6b5d4914fa66cbb32 [2022-07-12 18:46:07,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:46:07,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:46:07,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:46:07,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:46:07,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:46:07,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:46:07" (1/1) ... [2022-07-12 18:46:07,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485f75b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:07, skipping insertion in model container [2022-07-12 18:46:07,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:46:07" (1/1) ... [2022-07-12 18:46:07,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:46:07,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:46:07,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:46:07,961 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:46:07,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:46:08,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:46:08,008 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:46:08,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:46:08,061 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:46:08,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08 WrapperNode [2022-07-12 18:46:08,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:46:08,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:46:08,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:46:08,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:46:08,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,105 INFO L137 Inliner]: procedures = 128, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-07-12 18:46:08,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:46:08,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:46:08,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:46:08,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:46:08,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:46:08,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:46:08,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:46:08,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:46:08,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (1/1) ... [2022-07-12 18:46:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:46:08,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:08,186 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 18:46:08,203 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 18:46:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 18:46:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:46:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:46:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:46:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:46:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:46:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:46:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 18:46:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 18:46:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:46:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:46:08,339 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:46:08,340 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:46:08,613 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:46:08,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:46:08,631 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 18:46:08,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:46:08 BoogieIcfgContainer [2022-07-12 18:46:08,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:46:08,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:46:08,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:46:08,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:46:08,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:46:07" (1/3) ... [2022-07-12 18:46:08,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b706b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:46:08, skipping insertion in model container [2022-07-12 18:46:08,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:08" (2/3) ... [2022-07-12 18:46:08,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b706b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:46:08, skipping insertion in model container [2022-07-12 18:46:08,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:46:08" (3/3) ... [2022-07-12 18:46:08,639 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019_1-2.i [2022-07-12 18:46:08,662 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:46:08,662 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2022-07-12 18:46:08,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:46:08,702 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@3d123850, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f907615 [2022-07-12 18:46:08,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2022-07-12 18:46:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 69 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-12 18:46:08,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:08,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-12 18:46:08,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-07-12 18:46:08,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:08,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46630655] [2022-07-12 18:46:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:08,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:08,746 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 18:46:08,765 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 18:46:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:46:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:08,911 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:46:08,912 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 1 case distinctions, treesize of input 9 treesize of output 14 [2022-07-12 18:46:08,936 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 18:46:08,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:08,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:08,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46630655] [2022-07-12 18:46:08,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46630655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:08,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:08,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357331610] [2022-07-12 18:46:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:08,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:08,965 INFO L87 Difference]: Start difference. First operand has 70 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 69 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:09,070 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-07-12 18:46:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:09,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-12 18:46:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:09,079 INFO L225 Difference]: With dead ends: 66 [2022-07-12 18:46:09,080 INFO L226 Difference]: Without dead ends: 64 [2022-07-12 18:46:09,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:09,083 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:09,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 38 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-12 18:46:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-12 18:46:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 63 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-07-12 18:46:09,111 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 3 [2022-07-12 18:46:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:09,112 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-07-12 18:46:09,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-07-12 18:46:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-12 18:46:09,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:09,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-12 18:46:09,137 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 18:46:09,320 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 18:46:09,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:09,322 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-07-12 18:46:09,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:09,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066592167] [2022-07-12 18:46:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:09,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:09,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:09,336 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 18:46:09,344 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 18:46:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:09,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:46:09,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:09,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:09,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:46:09,493 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 11 treesize of output 9 [2022-07-12 18:46:09,517 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 18:46:09,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:09,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:09,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066592167] [2022-07-12 18:46:09,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066592167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:09,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:09,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451028206] [2022-07-12 18:46:09,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:09,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:09,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:09,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:09,525 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:09,617 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-07-12 18:46:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-12 18:46:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:09,620 INFO L225 Difference]: With dead ends: 63 [2022-07-12 18:46:09,620 INFO L226 Difference]: Without dead ends: 63 [2022-07-12 18:46:09,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:09,621 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:09,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-12 18:46:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-12 18:46:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-07-12 18:46:09,625 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 3 [2022-07-12 18:46:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:09,625 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-07-12 18:46:09,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-07-12 18:46:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 18:46:09,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:09,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 18:46:09,648 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 18:46:09,834 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 18:46:09,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:09,836 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2022-07-12 18:46:09,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:09,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124361105] [2022-07-12 18:46:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:09,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:09,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:09,846 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 18:46:09,849 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 18:46:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:46:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:09,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:09,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:46:09,912 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 11 treesize of output 9 [2022-07-12 18:46:09,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:09,948 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 18:46:09,956 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:46:09,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:46:09,960 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 18:46:09,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:09,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:09,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124361105] [2022-07-12 18:46:09,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124361105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:09,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:09,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764199590] [2022-07-12 18:46:09,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:09,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:09,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:09,963 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:10,062 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-07-12 18:46:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-12 18:46:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:10,064 INFO L225 Difference]: With dead ends: 60 [2022-07-12 18:46:10,064 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:46:10,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:10,065 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:10,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 25 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:46:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-12 18:46:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 59 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-07-12 18:46:10,069 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 5 [2022-07-12 18:46:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:10,069 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-07-12 18:46:10,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-07-12 18:46:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:46:10,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:10,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:10,097 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 18:46:10,276 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 18:46:10,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash 59199982, now seen corresponding path program 1 times [2022-07-12 18:46:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:10,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278286629] [2022-07-12 18:46:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:10,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:10,287 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 18:46:10,288 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 18:46:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:46:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:10,372 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:46:10,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:46:10,391 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 18:46:10,392 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-12 18:46:10,433 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 18:46:10,440 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 18:46:10,479 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 18:46:10,480 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 15 treesize of output 15 [2022-07-12 18:46:10,488 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 16 treesize of output 18 [2022-07-12 18:46:10,527 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:46:10,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:46:10,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:10,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:46:10,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:46:10,557 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 18:46:10,568 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 18:46:10,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:10,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278286629] [2022-07-12 18:46:10,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278286629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:10,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:10,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:46:10,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298422] [2022-07-12 18:46:10,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:10,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:46:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:46:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:10,571 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:10,810 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-07-12 18:46:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:46:10,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:46:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:10,811 INFO L225 Difference]: With dead ends: 59 [2022-07-12 18:46:10,811 INFO L226 Difference]: Without dead ends: 59 [2022-07-12 18:46:10,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:46:10,812 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:10,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 142 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-12 18:46:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-12 18:46:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 58 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-07-12 18:46:10,816 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 8 [2022-07-12 18:46:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:10,816 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-07-12 18:46:10,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-07-12 18:46:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:46:10,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:10,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:10,829 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 18:46:11,017 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 18:46:11,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:11,017 INFO L85 PathProgramCache]: Analyzing trace with hash 59199981, now seen corresponding path program 1 times [2022-07-12 18:46:11,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:11,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523019566] [2022-07-12 18:46:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:11,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:11,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:11,019 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 18:46:11,021 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 18:46:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:11,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:46:11,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:11,114 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 18:46:11,115 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-12 18:46:11,126 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 18:46:11,152 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-12 18:46:11,153 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 23 treesize of output 34 [2022-07-12 18:46:11,185 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:46:11,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2022-07-12 18:46:11,217 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:46:11,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2022-07-12 18:46:11,226 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 18:46:11,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:11,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523019566] [2022-07-12 18:46:11,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523019566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:11,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:11,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:46:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43764234] [2022-07-12 18:46:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:11,229 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:11,478 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-07-12 18:46:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:46:11,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:46:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:11,479 INFO L225 Difference]: With dead ends: 58 [2022-07-12 18:46:11,479 INFO L226 Difference]: Without dead ends: 58 [2022-07-12 18:46:11,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 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 18:46:11,480 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 3 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:11,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 169 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-12 18:46:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-12 18:46:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 57 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-07-12 18:46:11,483 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 8 [2022-07-12 18:46:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:11,483 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-07-12 18:46:11,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-07-12 18:46:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:46:11,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:11,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:11,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:46:11,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:46:11,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937559, now seen corresponding path program 1 times [2022-07-12 18:46:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:11,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730834753] [2022-07-12 18:46:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:11,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:11,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:11,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:46:11,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:46:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:46:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:11,784 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 11 treesize of output 9 [2022-07-12 18:46:11,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:11,809 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 18:46:11,854 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:46:11,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-12 18:46:11,908 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:11,908 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 30 treesize of output 31 [2022-07-12 18:46:11,921 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:46:11,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-07-12 18:46:11,932 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 18:46:11,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:11,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730834753] [2022-07-12 18:46:11,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730834753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:11,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:11,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:46:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217075380] [2022-07-12 18:46:11,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:46:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:46:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:46:11,934 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:12,106 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-07-12 18:46:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:46:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:46:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:12,107 INFO L225 Difference]: With dead ends: 57 [2022-07-12 18:46:12,107 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 18:46:12,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:46:12,108 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:12,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 183 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 18:46:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-12 18:46:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 56 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-07-12 18:46:12,111 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 11 [2022-07-12 18:46:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:12,111 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-07-12 18:46:12,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-07-12 18:46:12,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:46:12,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:12,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:12,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:46:12,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:46:12,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937558, now seen corresponding path program 1 times [2022-07-12 18:46:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:12,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705308625] [2022-07-12 18:46:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:12,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:12,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:12,314 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 18:46:12,316 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 18:46:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:46:12,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:12,432 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 11 treesize of output 9 [2022-07-12 18:46:12,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:12,457 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 18:46:12,481 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 18:46:12,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:12,490 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 22 treesize of output 21 [2022-07-12 18:46:12,568 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:12,569 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 40 treesize of output 39 [2022-07-12 18:46:12,572 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 20 treesize of output 22 [2022-07-12 18:46:12,592 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:46:12,595 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 18:46:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:12,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:12,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:12,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705308625] [2022-07-12 18:46:12,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705308625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:12,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:12,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:46:12,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908621963] [2022-07-12 18:46:12,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:12,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:46:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:12,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:46:12,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:46:12,609 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:12,806 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-07-12 18:46:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:46:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:46:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:12,807 INFO L225 Difference]: With dead ends: 56 [2022-07-12 18:46:12,807 INFO L226 Difference]: Without dead ends: 56 [2022-07-12 18:46:12,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:46:12,808 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:12,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 225 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-12 18:46:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-12 18:46:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.696969696969697) internal successors, (56), 55 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-07-12 18:46:12,810 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 11 [2022-07-12 18:46:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:12,811 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-07-12 18:46:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-07-12 18:46:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:46:12,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:12,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:12,832 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 18:46:13,019 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 18:46:13,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886990, now seen corresponding path program 1 times [2022-07-12 18:46:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994805943] [2022-07-12 18:46:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:13,022 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 18:46:13,023 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 18:46:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:46:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:13,101 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 18:46:13,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:13,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:13,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994805943] [2022-07-12 18:46:13,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994805943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:13,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:13,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878850650] [2022-07-12 18:46:13,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:13,103 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:13,169 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-07-12 18:46:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:46:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:13,170 INFO L225 Difference]: With dead ends: 54 [2022-07-12 18:46:13,170 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 18:46:13,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:46:13,171 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:13,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 18:46:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-12 18:46:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 53 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-07-12 18:46:13,173 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 14 [2022-07-12 18:46:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:13,174 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-07-12 18:46:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-07-12 18:46:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:46:13,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:13,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:13,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-12 18:46:13,380 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 18:46:13,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886989, now seen corresponding path program 1 times [2022-07-12 18:46:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:13,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973719839] [2022-07-12 18:46:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:13,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:13,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:13,387 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 18:46:13,389 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 18:46:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:13,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:46:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:13,548 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 18:46:13,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:13,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:13,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973719839] [2022-07-12 18:46:13,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973719839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:13,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:13,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999878029] [2022-07-12 18:46:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:13,550 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:13,635 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-07-12 18:46:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:46:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:13,636 INFO L225 Difference]: With dead ends: 52 [2022-07-12 18:46:13,636 INFO L226 Difference]: Without dead ends: 52 [2022-07-12 18:46:13,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:46:13,637 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:13,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-12 18:46:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-12 18:46:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-07-12 18:46:13,639 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 14 [2022-07-12 18:46:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:13,639 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-07-12 18:46:13,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-07-12 18:46:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:46:13,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:13,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:13,664 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 18:46:13,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:46:13,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash 478865263, now seen corresponding path program 1 times [2022-07-12 18:46:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:13,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839018104] [2022-07-12 18:46:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:13,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:13,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:46:13,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:46:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:13,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:46:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:13,935 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 18:46:13,939 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 18:46:13,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:13,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:13,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839018104] [2022-07-12 18:46:13,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839018104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:13,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:13,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:13,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300383859] [2022-07-12 18:46:13,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:13,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:13,942 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:14,003 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-07-12 18:46:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 18:46:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:14,004 INFO L225 Difference]: With dead ends: 48 [2022-07-12 18:46:14,004 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 18:46:14,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:14,005 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:14,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 18:46:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-12 18:46:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-07-12 18:46:14,007 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 17 [2022-07-12 18:46:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:14,007 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-07-12 18:46:14,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-07-12 18:46:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:46:14,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:14,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:14,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:46:14,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:46:14,218 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 478865264, now seen corresponding path program 1 times [2022-07-12 18:46:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:14,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353362132] [2022-07-12 18:46:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:14,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:14,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:14,221 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 18:46:14,222 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 18:46:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:14,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:46:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:14,303 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 18:46:14,309 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 18:46:14,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:14,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:14,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353362132] [2022-07-12 18:46:14,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353362132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:14,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:14,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671861689] [2022-07-12 18:46:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:14,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:14,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:14,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:14,312 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:14,370 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-07-12 18:46:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 18:46:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:14,371 INFO L225 Difference]: With dead ends: 44 [2022-07-12 18:46:14,371 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 18:46:14,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:14,371 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:14,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 18:46:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-12 18:46:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 43 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-07-12 18:46:14,374 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 17 [2022-07-12 18:46:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:14,374 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-07-12 18:46:14,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-07-12 18:46:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:46:14,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:14,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:14,382 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 18:46:14,582 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 18:46:14,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash -925217004, now seen corresponding path program 1 times [2022-07-12 18:46:14,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:14,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232545070] [2022-07-12 18:46:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:14,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:14,585 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 18:46:14,597 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 18:46:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:46:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:14,798 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 11 treesize of output 9 [2022-07-12 18:46:14,814 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 18:46:14,854 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:46:14,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-12 18:46:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:14,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2022-07-12 18:46:14,966 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:14,966 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 18:46:15,058 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:15,059 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 40 treesize of output 39 [2022-07-12 18:46:15,196 INFO L356 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2022-07-12 18:46:15,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 48 [2022-07-12 18:46:15,259 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:46:15,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 54 treesize of output 44 [2022-07-12 18:46:15,348 INFO L356 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-07-12 18:46:15,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 56 [2022-07-12 18:46:15,421 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:46:15,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 57 treesize of output 27 [2022-07-12 18:46:15,506 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 18:46:15,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:15,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:15,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232545070] [2022-07-12 18:46:15,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232545070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:15,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:15,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:46:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383447996] [2022-07-12 18:46:15,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:15,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:46:15,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:46:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:46:15,507 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:16,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:16,155 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-07-12 18:46:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:46:16,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-12 18:46:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:16,156 INFO L225 Difference]: With dead ends: 43 [2022-07-12 18:46:16,156 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 18:46:16,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:46:16,157 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:16,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 166 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-07-12 18:46:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 18:46:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-12 18:46:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.303030303030303) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-07-12 18:46:16,162 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 23 [2022-07-12 18:46:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:16,162 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-07-12 18:46:16,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-07-12 18:46:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:46:16,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:16,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:16,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-12 18:46:16,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:46:16,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:16,371 INFO L85 PathProgramCache]: Analyzing trace with hash -925217003, now seen corresponding path program 1 times [2022-07-12 18:46:16,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:16,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379040719] [2022-07-12 18:46:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:16,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:16,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:16,373 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:46:16,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 18:46:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:16,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:46:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:16,632 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:46:16,633 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:46:16,647 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:46:16,647 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 20 treesize of output 22 [2022-07-12 18:46:16,688 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 18:46:16,725 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-12 18:46:16,725 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 20 treesize of output 22 [2022-07-12 18:46:16,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:46:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:16,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 30 [2022-07-12 18:46:16,783 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 6 treesize of output 5 [2022-07-12 18:46:16,928 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:16,929 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 86 treesize of output 75 [2022-07-12 18:46:16,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 37 [2022-07-12 18:46:17,150 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:17,150 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 90 treesize of output 79 [2022-07-12 18:46:17,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 39 [2022-07-12 18:46:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:17,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-12 18:46:17,448 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 18:46:17,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 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 18:46:17,730 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:46:17,730 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 44 treesize of output 31 [2022-07-12 18:46:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:17,801 INFO L356 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-07-12 18:46:17,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 80 treesize of output 66 [2022-07-12 18:46:18,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:18,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:18,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:21,259 INFO L356 Elim1Store]: treesize reduction 110, result has 24.1 percent of original size [2022-07-12 18:46:21,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 199 treesize of output 177 [2022-07-12 18:46:22,099 INFO L356 Elim1Store]: treesize reduction 100, result has 25.4 percent of original size [2022-07-12 18:46:22,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 171 [2022-07-12 18:46:23,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 18:46:23,021 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 32 treesize of output 16 [2022-07-12 18:46:23,177 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 18:46:23,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:23,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:23,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379040719] [2022-07-12 18:46:23,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379040719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:23,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:23,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 18:46:23,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195322461] [2022-07-12 18:46:23,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:23,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:46:23,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:23,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:46:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:46:23,179 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:25,601 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-07-12 18:46:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:46:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-12 18:46:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:25,602 INFO L225 Difference]: With dead ends: 41 [2022-07-12 18:46:25,602 INFO L226 Difference]: Without dead ends: 41 [2022-07-12 18:46:25,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:46:25,603 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:25,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 127 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 182 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-07-12 18:46:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-12 18:46:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-12 18:46:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-07-12 18:46:25,604 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 23 [2022-07-12 18:46:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:25,604 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-07-12 18:46:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-07-12 18:46:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:46:25,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:25,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:25,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:46:25,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:46:25,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:25,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1383043969, now seen corresponding path program 1 times [2022-07-12 18:46:25,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:25,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595116126] [2022-07-12 18:46:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:25,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:25,807 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 18:46:25,809 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 18:46:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:46:25,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:25,992 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 11 treesize of output 9 [2022-07-12 18:46:26,009 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 18:46:26,042 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:46:26,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-12 18:46:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:26,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2022-07-12 18:46:26,168 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:26,169 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 40 treesize of output 39 [2022-07-12 18:46:26,237 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:26,237 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 41 [2022-07-12 18:46:27,283 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:46:27,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 17 [2022-07-12 18:46:27,324 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-12 18:46:27,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 40 [2022-07-12 18:46:27,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:46:27,443 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 44 treesize of output 20 [2022-07-12 18:46:27,513 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 18:46:27,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:27,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:27,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595116126] [2022-07-12 18:46:27,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595116126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:27,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:27,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:46:27,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282365434] [2022-07-12 18:46:27,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:27,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:46:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:27,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:46:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:46:27,516 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:28,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:46:34,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:46:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,729 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-07-12 18:46:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:46:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-12 18:46:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,730 INFO L225 Difference]: With dead ends: 40 [2022-07-12 18:46:34,730 INFO L226 Difference]: Without dead ends: 40 [2022-07-12 18:46:34,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:46:34,731 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 149 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 1 Unknown, 103 Unchecked, 4.6s Time] [2022-07-12 18:46:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-12 18:46:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-12 18:46:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-07-12 18:46:34,733 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 24 [2022-07-12 18:46:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,733 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-07-12 18:46:34,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-07-12 18:46:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:46:34,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:34,742 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 18:46:34,934 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 18:46:34,934 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:46:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1383043970, now seen corresponding path program 1 times [2022-07-12 18:46:34,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:46:34,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300231862] [2022-07-12 18:46:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:46:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:46:34,936 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 18:46:34,937 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 18:46:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:35,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 18:46:35,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:35,180 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 11 treesize of output 9 [2022-07-12 18:46:35,198 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 18:46:35,215 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 18:46:35,237 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:46:35,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-12 18:46:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:35,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2022-07-12 18:46:35,292 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 18:46:35,411 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:35,411 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 61 treesize of output 56 [2022-07-12 18:46:35,416 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 20 treesize of output 22 [2022-07-12 18:46:35,513 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:46:35,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 60 [2022-07-12 18:46:35,518 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 22 treesize of output 24 [2022-07-12 18:46:39,605 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 19 treesize of output 7 [2022-07-12 18:46:39,610 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:46:39,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 22 [2022-07-12 18:46:39,664 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:46:39,664 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 17 treesize of output 19 [2022-07-12 18:46:39,670 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 18:46:39,700 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 18:46:39,706 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 13 treesize of output 9 [2022-07-12 18:46:39,759 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 31 treesize of output 13 [2022-07-12 18:46:39,763 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 19 treesize of output 7 [2022-07-12 18:46:39,816 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 18:46:39,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:39,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:46:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300231862] [2022-07-12 18:46:39,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300231862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:39,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:39,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:46:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408014027] [2022-07-12 18:46:39,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:46:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:46:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:46:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=150, Unknown=2, NotChecked=0, Total=182 [2022-07-12 18:46:39,819 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:01,606 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-07-12 18:47:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:47:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-12 18:47:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:01,607 INFO L225 Difference]: With dead ends: 38 [2022-07-12 18:47:01,607 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 18:47:01,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=90, Invalid=460, Unknown=2, NotChecked=0, Total=552 [2022-07-12 18:47:01,608 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:01,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 101 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 240 Invalid, 0 Unknown, 28 Unchecked, 0.8s Time] [2022-07-12 18:47:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 18:47:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-12 18:47:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-07-12 18:47:01,609 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 24 [2022-07-12 18:47:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:01,610 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-07-12 18:47:01,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-07-12 18:47:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:47:01,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:01,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:01,624 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 18:47:01,810 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 18:47:01,811 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:47:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash 641636282, now seen corresponding path program 1 times [2022-07-12 18:47:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:47:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971418553] [2022-07-12 18:47:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:01,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:47:01,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:47:01,813 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 18:47:01,814 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 18:47:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 18:47:02,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:02,122 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:47:02,122 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 20 treesize of output 22 [2022-07-12 18:47:02,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:47:02,173 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 18:47:02,236 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-12 18:47:02,236 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 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-12 18:47:02,314 INFO L356 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2022-07-12 18:47:02,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 50 [2022-07-12 18:47:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 50 treesize of output 37 [2022-07-12 18:47:02,485 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 18:47:02,700 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:02,701 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 153 treesize of output 136 [2022-07-12 18:47:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 67 [2022-07-12 18:47:02,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 114 treesize of output 102 [2022-07-12 18:47:03,134 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:03,134 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 239 treesize of output 214 [2022-07-12 18:47:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:03,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:03,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 165 [2022-07-12 18:47:03,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 202 treesize of output 182 [2022-07-12 18:47:03,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:03,863 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 135 [2022-07-12 18:47:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:04,090 INFO L356 Elim1Store]: treesize reduction 12, result has 65.7 percent of original size [2022-07-12 18:47:04,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2022-07-12 18:47:04,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-07-12 18:47:04,291 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:47:04,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 176 treesize of output 114 [2022-07-12 18:47:04,306 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:47:04,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2022-07-12 18:47:04,519 INFO L356 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-07-12 18:47:04,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 123 [2022-07-12 18:47:04,534 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-07-12 18:47:04,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 76 [2022-07-12 18:47:04,600 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 18:47:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,188 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:47:05,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 100 [2022-07-12 18:47:05,200 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 19 treesize of output 7 [2022-07-12 18:47:05,463 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 9 [2022-07-12 18:47:05,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:05,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:05,723 INFO L356 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2022-07-12 18:47:05,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 63 [2022-07-12 18:47:05,807 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 18:47:05,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:47:05,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:47:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971418553] [2022-07-12 18:47:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971418553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:05,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:05,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 18:47:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320367765] [2022-07-12 18:47:05,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:05,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:47:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:47:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:47:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:47:05,808 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:05,877 INFO L93 Difference]: Finished difference Result 38 states and 37 transitions. [2022-07-12 18:47:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:47:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 18:47:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:05,878 INFO L225 Difference]: With dead ends: 38 [2022-07-12 18:47:05,878 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 18:47:05,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:47:05,879 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:05,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 200 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 142 Unchecked, 0.0s Time] [2022-07-12 18:47:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 18:47:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-12 18:47:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.121212121212121) internal successors, (37), 37 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 37 transitions. [2022-07-12 18:47:05,880 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 37 transitions. Word has length 27 [2022-07-12 18:47:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:05,880 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 37 transitions. [2022-07-12 18:47:05,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 37 transitions. [2022-07-12 18:47:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:47:05,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:05,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:05,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-12 18:47:06,081 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 18:47:06,082 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:47:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash 641637819, now seen corresponding path program 1 times [2022-07-12 18:47:06,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:47:06,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580921249] [2022-07-12 18:47:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:06,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:47:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:47:06,084 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 18:47:06,085 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 18:47:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:47:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:06,293 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 11 treesize of output 9 [2022-07-12 18:47:06,311 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 18:47:06,350 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:47:06,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:47:06,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:06,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 24 [2022-07-12 18:47:06,478 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:06,478 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 36 treesize of output 35 [2022-07-12 18:47:06,554 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:06,554 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 18:47:06,739 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-07-12 18:47:06,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 45 [2022-07-12 18:47:09,642 INFO L356 Elim1Store]: treesize reduction 100, result has 29.6 percent of original size [2022-07-12 18:47:09,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 65 [2022-07-12 18:47:09,867 INFO L356 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2022-07-12 18:47:09,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2022-07-12 18:47:09,969 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 18:47:09,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:47:09,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:47:09,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580921249] [2022-07-12 18:47:09,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580921249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:09,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:09,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:47:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479618621] [2022-07-12 18:47:09,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:09,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:47:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:47:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:47:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:47:09,972 INFO L87 Difference]: Start difference. First operand 38 states and 37 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:10,915 INFO L93 Difference]: Finished difference Result 37 states and 36 transitions. [2022-07-12 18:47:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:47:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 18:47:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:10,916 INFO L225 Difference]: With dead ends: 37 [2022-07-12 18:47:10,916 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 18:47:10,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:47:10,917 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:10,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 141 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-07-12 18:47:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 18:47:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-12 18:47:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 36 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 36 transitions. [2022-07-12 18:47:10,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 36 transitions. Word has length 27 [2022-07-12 18:47:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:10,919 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 36 transitions. [2022-07-12 18:47:10,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 36 transitions. [2022-07-12 18:47:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:47:10,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:10,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:10,955 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 18:47:11,119 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 18:47:11,120 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:47:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1584063997, now seen corresponding path program 1 times [2022-07-12 18:47:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:47:11,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121932480] [2022-07-12 18:47:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:11,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:47:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:47:11,134 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 18:47:11,155 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 18:47:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:11,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 18:47:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:11,281 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 18:47:11,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:47:11,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:47:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121932480] [2022-07-12 18:47:11,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121932480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:11,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:11,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:47:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020704597] [2022-07-12 18:47:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:11,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:47:11,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:47:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:47:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:47:11,282 INFO L87 Difference]: Start difference. First operand 37 states and 36 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:11,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:11,334 INFO L93 Difference]: Finished difference Result 36 states and 35 transitions. [2022-07-12 18:47:11,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:47:11,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-12 18:47:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:11,335 INFO L225 Difference]: With dead ends: 36 [2022-07-12 18:47:11,335 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 18:47:11,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:47:11,336 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:11,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:47:11,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 18:47:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-12 18:47:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 35 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 35 transitions. [2022-07-12 18:47:11,337 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 35 transitions. Word has length 28 [2022-07-12 18:47:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:11,337 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 35 transitions. [2022-07-12 18:47:11,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 35 transitions. [2022-07-12 18:47:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:47:11,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:11,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:11,358 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 18:47:11,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:47:11,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:47:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1867075259, now seen corresponding path program 1 times [2022-07-12 18:47:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:47:11,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959568580] [2022-07-12 18:47:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:11,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:47:11,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:47:11,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:47:11,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:47:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:11,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:47:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:11,730 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 11 treesize of output 9 [2022-07-12 18:47:11,746 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 18:47:11,770 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:47:11,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:47:11,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:11,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2022-07-12 18:47:11,887 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:11,887 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 18:47:11,948 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:11,948 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 40 treesize of output 39 [2022-07-12 18:47:11,993 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:47:11,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 15 [2022-07-12 18:47:12,032 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 18:47:12,063 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 19 treesize of output 7 [2022-07-12 18:47:12,116 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 18:47:12,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:47:12,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:47:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959568580] [2022-07-12 18:47:12,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959568580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:12,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:12,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:47:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85311265] [2022-07-12 18:47:12,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:47:12,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:47:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:47:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:47:12,117 INFO L87 Difference]: Start difference. First operand 36 states and 35 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:14,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:47:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:17,306 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2022-07-12 18:47:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:47:17,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-12 18:47:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:17,307 INFO L225 Difference]: With dead ends: 35 [2022-07-12 18:47:17,307 INFO L226 Difference]: Without dead ends: 35 [2022-07-12 18:47:17,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:47:17,323 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:17,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 99 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-12 18:47:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-12 18:47:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-12 18:47:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2022-07-12 18:47:17,332 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 30 [2022-07-12 18:47:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:17,332 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2022-07-12 18:47:17,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2022-07-12 18:47:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:47:17,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:17,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:17,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:47:17,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:47:17,543 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:47:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2044758081, now seen corresponding path program 1 times [2022-07-12 18:47:17,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:47:17,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522276916] [2022-07-12 18:47:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:47:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:47:17,545 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 18:47:17,547 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 18:47:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:47:17,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:17,798 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:47:17,798 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 20 treesize of output 22 [2022-07-12 18:47:17,826 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 18:47:17,857 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-12 18:47:17,857 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 23 treesize of output 25 [2022-07-12 18:47:17,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:17,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 25 [2022-07-12 18:47:17,981 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:17,981 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 43 treesize of output 40 [2022-07-12 18:47:18,045 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:18,045 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 45 treesize of output 42 [2022-07-12 18:47:18,159 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 18:47:18,236 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-07-12 18:47:18,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2022-07-12 18:47:20,065 INFO L356 Elim1Store]: treesize reduction 166, result has 23.5 percent of original size [2022-07-12 18:47:20,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 96 [2022-07-12 18:47:20,606 INFO L356 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-07-12 18:47:20,607 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 47 [2022-07-12 18:47:20,710 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 18:47:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:20,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:47:20,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:47:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522276916] [2022-07-12 18:47:20,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522276916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:20,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:20,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 18:47:20,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870735092] [2022-07-12 18:47:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:20,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:47:20,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:47:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:47:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=333, Unknown=1, NotChecked=0, Total=380 [2022-07-12 18:47:20,741 INFO L87 Difference]: Start difference. First operand 35 states and 34 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:24,140 INFO L93 Difference]: Finished difference Result 34 states and 33 transitions. [2022-07-12 18:47:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:47:24,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-12 18:47:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:24,141 INFO L225 Difference]: With dead ends: 34 [2022-07-12 18:47:24,141 INFO L226 Difference]: Without dead ends: 34 [2022-07-12 18:47:24,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=97, Invalid=658, Unknown=1, NotChecked=0, Total=756 [2022-07-12 18:47:24,141 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:24,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 116 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 158 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-07-12 18:47:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-12 18:47:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-12 18:47:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0) internal successors, (33), 33 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 33 transitions. [2022-07-12 18:47:24,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 33 transitions. Word has length 31 [2022-07-12 18:47:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:24,143 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 33 transitions. [2022-07-12 18:47:24,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 33 transitions. [2022-07-12 18:47:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:47:24,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:24,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:24,167 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 18:47:24,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:47:24,344 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 18:47:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2082508994, now seen corresponding path program 1 times [2022-07-12 18:47:24,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:47:24,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837026651] [2022-07-12 18:47:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:24,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:47:24,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:47:24,346 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:47:24,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:47:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 18:47:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:24,701 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 18:47:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:24,785 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 58 treesize of output 49 [2022-07-12 18:47:24,944 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:24,944 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 68 treesize of output 63 [2022-07-12 18:47:25,045 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:47:25,046 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 69 treesize of output 64 [2022-07-12 18:47:25,350 INFO L356 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2022-07-12 18:47:25,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 76 [2022-07-12 18:47:25,471 INFO L356 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2022-07-12 18:47:25,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 85 [2022-07-12 18:47:25,733 INFO L356 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-07-12 18:47:25,733 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 62 [2022-07-12 18:47:30,261 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 18:47:30,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:47:30,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:47:30,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837026651] [2022-07-12 18:47:30,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837026651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:30,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:30,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 18:47:30,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272675537] [2022-07-12 18:47:30,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:30,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:47:30,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:47:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:47:30,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=372, Unknown=2, NotChecked=0, Total=420 [2022-07-12 18:47:30,262 INFO L87 Difference]: Start difference. First operand 34 states and 33 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:30,263 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2022-07-12 18:47:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:47:30,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-12 18:47:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:30,264 INFO L225 Difference]: With dead ends: 33 [2022-07-12 18:47:30,264 INFO L226 Difference]: Without dead ends: 0 [2022-07-12 18:47:30,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=46, Invalid=372, Unknown=2, NotChecked=0, Total=420 [2022-07-12 18:47:30,264 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:30,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 57 Unchecked, 0.0s Time] [2022-07-12 18:47:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-12 18:47:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-12 18:47:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-12 18:47:30,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2022-07-12 18:47:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:30,265 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-12 18:47:30,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:47:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-12 18:47:30,265 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-12 18:47:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 35 remaining) [2022-07-12 18:47:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 35 remaining) [2022-07-12 18:47:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 35 remaining) [2022-07-12 18:47:30,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 35 remaining) [2022-07-12 18:47:30,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 35 remaining) [2022-07-12 18:47:30,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 35 remaining) [2022-07-12 18:47:30,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 35 remaining) [2022-07-12 18:47:30,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 35 remaining) [2022-07-12 18:47:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 35 remaining) [2022-07-12 18:47:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 35 remaining) [2022-07-12 18:47:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 35 remaining) [2022-07-12 18:47:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 35 remaining) [2022-07-12 18:47:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 35 remaining) [2022-07-12 18:47:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 35 remaining) [2022-07-12 18:47:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 35 remaining) [2022-07-12 18:47:30,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 35 remaining) [2022-07-12 18:47:30,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 35 remaining) [2022-07-12 18:47:30,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 35 remaining) [2022-07-12 18:47:30,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 35 remaining) [2022-07-12 18:47:30,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 35 remaining) [2022-07-12 18:47:30,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 35 remaining) [2022-07-12 18:47:30,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 35 remaining) [2022-07-12 18:47:30,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 35 remaining) [2022-07-12 18:47:30,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 35 remaining) [2022-07-12 18:47:30,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 35 remaining) [2022-07-12 18:47:30,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (6 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (5 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (4 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE (3 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (2 of 35 remaining) [2022-07-12 18:47:30,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (1 of 35 remaining) [2022-07-12 18:47:30,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK (0 of 35 remaining) [2022-07-12 18:47:30,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:47:30,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:47:30,494 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:30,496 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 18:47:30,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 06:47:30 BoogieIcfgContainer [2022-07-12 18:47:30,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 18:47:30,502 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 18:47:30,502 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 18:47:30,502 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 18:47:30,502 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:46:08" (3/4) ... [2022-07-12 18:47:30,504 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-12 18:47:30,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-07-12 18:47:30,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-07-12 18:47:30,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-07-12 18:47:30,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-12 18:47:30,555 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 18:47:30,556 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 18:47:30,556 INFO L158 Benchmark]: Toolchain (without parser) took 82868.77ms. Allocated memory was 77.6MB in the beginning and 113.2MB in the end (delta: 35.7MB). Free memory was 53.0MB in the beginning and 50.8MB in the end (delta: 2.2MB). Peak memory consumption was 38.3MB. Max. memory is 16.1GB. [2022-07-12 18:47:30,556 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 54.5MB. Free memory was 35.1MB in the beginning and 35.0MB in the end (delta: 35.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:47:30,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.54ms. Allocated memory is still 77.6MB. Free memory was 52.8MB in the beginning and 49.7MB in the end (delta: 3.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-12 18:47:30,557 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.98ms. Allocated memory is still 77.6MB. Free memory was 49.5MB in the beginning and 47.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 18:47:30,557 INFO L158 Benchmark]: Boogie Preprocessor took 41.24ms. Allocated memory is still 77.6MB. Free memory was 47.5MB in the beginning and 45.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 18:47:30,557 INFO L158 Benchmark]: RCFGBuilder took 484.58ms. Allocated memory is still 77.6MB. Free memory was 45.9MB in the beginning and 47.5MB in the end (delta: -1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 18:47:30,557 INFO L158 Benchmark]: TraceAbstraction took 81866.87ms. Allocated memory was 77.6MB in the beginning and 113.2MB in the end (delta: 35.7MB). Free memory was 47.2MB in the beginning and 53.9MB in the end (delta: -6.7MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2022-07-12 18:47:30,557 INFO L158 Benchmark]: Witness Printer took 53.84ms. Allocated memory is still 113.2MB. Free memory was 53.9MB in the beginning and 50.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 18:47:30,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 54.5MB. Free memory was 35.1MB in the beginning and 35.0MB in the end (delta: 35.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.54ms. Allocated memory is still 77.6MB. Free memory was 52.8MB in the beginning and 49.7MB in the end (delta: 3.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.98ms. Allocated memory is still 77.6MB. Free memory was 49.5MB in the beginning and 47.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.24ms. Allocated memory is still 77.6MB. Free memory was 47.5MB in the beginning and 45.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 484.58ms. Allocated memory is still 77.6MB. Free memory was 45.9MB in the beginning and 47.5MB in the end (delta: -1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 81866.87ms. Allocated memory was 77.6MB in the beginning and 113.2MB in the end (delta: 35.7MB). Free memory was 47.2MB in the beginning and 53.9MB in the end (delta: -6.7MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. * Witness Printer took 53.84ms. Allocated memory is still 113.2MB. Free memory was 53.9MB in the beginning and 50.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 540]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 540]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 541]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 541]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 541]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 543]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 70 locations, 35 error locations. Started 1 CEGAR loops. OverallTime: 81.8s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 43.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 607 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 607 mSDsluCounter, 2282 SdHoareTripleChecker+Invalid, 9.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 642 IncrementalHoareTripleChecker+Unchecked, 1660 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1855 IncrementalHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 622 mSDtfsCounter, 1855 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 434 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 47.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=0, InterpolantAutomatonStates: 224, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 31.0s InterpolantComputationTime, 381 NumberOfCodeBlocks, 381 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 360 ConstructedInterpolants, 85 QuantifiedInterpolants, 12291 SizeOfPredicates, 221 NumberOfNonLiveVariables, 3094 ConjunctsInSsa, 510 ConjunctsInUnsatCore, 21 InterpolantComputations, 21 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 35 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-12 18:47:30,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE