./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/20020406-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/memsafety/20020406-1.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 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:04:18,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:04:18,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:04:18,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:04:18,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:04:18,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:04:18,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:04:18,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:04:18,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:04:18,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:04:18,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:04:18,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:04:18,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:04:18,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:04:18,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:04:18,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:04:18,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:04:18,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:04:18,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:04:18,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:04:18,441 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:04:18,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:04:18,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:04:18,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:04:18,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:04:18,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:04:18,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:04:18,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:04:18,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:04:18,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:04:18,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:04:18,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:04:18,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:04:18,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:04:18,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:04:18,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:04:18,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:04:18,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:04:18,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:04:18,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:04:18,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:04:18,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:04:18,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:04:18,495 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:04:18,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:04:18,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:04:18,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:04:18,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:04:18,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:04:18,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:04:18,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:04:18,498 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:04:18,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:04:18,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:04:18,499 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:04:18,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:04:18,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:04:18,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:04:18,500 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:04:18,500 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:04:18,500 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:04:18,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:04:18,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:04:18,501 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:04:18,501 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:04:18,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:04:18,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:04:18,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:04:18,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:04:18,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:04:18,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:04:18,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:04:18,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:04:18,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2022-07-21 17:04:18,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:04:18,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:04:18,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:04:18,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:04:18,824 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:04:18,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2022-07-21 17:04:18,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37ebad9f/b42d5bc85b7044aabde2e3ea48ba921a/FLAG2f4e9566d [2022-07-21 17:04:19,366 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:04:19,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2022-07-21 17:04:19,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37ebad9f/b42d5bc85b7044aabde2e3ea48ba921a/FLAG2f4e9566d [2022-07-21 17:04:19,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37ebad9f/b42d5bc85b7044aabde2e3ea48ba921a [2022-07-21 17:04:19,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:04:19,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:04:19,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:04:19,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:04:19,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:04:19,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:04:19" (1/1) ... [2022-07-21 17:04:19,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed44a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:19, skipping insertion in model container [2022-07-21 17:04:19,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:04:19" (1/1) ... [2022-07-21 17:04:19,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:04:19,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:04:20,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:04:20,126 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) [2022-07-21 17:04:20,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11811c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:20, skipping insertion in model container [2022-07-21 17:04:20,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:04:20,128 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-21 17:04:20,130 INFO L158 Benchmark]: Toolchain (without parser) took 456.80ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.6MB in the beginning and 46.6MB in the end (delta: -16.9MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2022-07-21 17:04:20,131 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory is still 36.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:04:20,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 454.83ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.5MB in the beginning and 46.6MB in the end (delta: -17.0MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2022-07-21 17:04:20,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory is still 36.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 454.83ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.5MB in the beginning and 46.6MB in the end (delta: -17.0MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 897]: 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/memsafety/20020406-1.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 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:04:21,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:04:21,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:04:21,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:04:21,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:04:21,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:04:21,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:04:21,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:04:21,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:04:21,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:04:21,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:04:21,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:04:21,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:04:21,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:04:21,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:04:21,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:04:21,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:04:21,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:04:21,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:04:21,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:04:21,829 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:04:21,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:04:21,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:04:21,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:04:21,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:04:21,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:04:21,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:04:21,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:04:21,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:04:21,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:04:21,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:04:21,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:04:21,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:04:21,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:04:21,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:04:21,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:04:21,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:04:21,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:04:21,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:04:21,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:04:21,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:04:21,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:04:21,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:04:21,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:04:21,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:04:21,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:04:21,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:04:21,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:04:21,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:04:21,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:04:21,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:04:21,887 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:04:21,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:04:21,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:04:21,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:04:21,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:04:21,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:04:21,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:04:21,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:04:21,889 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:04:21,890 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:04:21,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:04:21,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:04:21,890 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:04:21,890 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:04:21,891 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:04:21,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:04:21,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:04:21,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:04:21,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:04:21,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:04:21,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:04:21,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:04:21,892 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:04:21,893 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:04:21,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:04:21,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2022-07-21 17:04:22,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:04:22,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:04:22,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:04:22,232 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:04:22,232 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:04:22,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2022-07-21 17:04:22,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7ebc8caa/da611692125740ac9dcb3a5a4119ea63/FLAGe60b6a6c1 [2022-07-21 17:04:22,756 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:04:22,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2022-07-21 17:04:22,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7ebc8caa/da611692125740ac9dcb3a5a4119ea63/FLAGe60b6a6c1 [2022-07-21 17:04:23,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7ebc8caa/da611692125740ac9dcb3a5a4119ea63 [2022-07-21 17:04:23,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:04:23,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:04:23,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:04:23,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:04:23,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:04:23,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed0ffe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23, skipping insertion in model container [2022-07-21 17:04:23,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:04:23,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:04:23,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:04:23,629 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 17:04:23,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:04:23,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:04:23,705 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:04:23,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:04:23,834 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:04:23,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23 WrapperNode [2022-07-21 17:04:23,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:04:23,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:04:23,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:04:23,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:04:23,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,891 INFO L137 Inliner]: procedures = 286, calls = 76, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-21 17:04:23,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:04:23,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:04:23,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:04:23,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:04:23,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:04:23,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:04:23,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:04:23,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:04:23,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (1/1) ... [2022-07-21 17:04:23,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:04:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:23,977 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) [2022-07-21 17:04:23,990 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 [2022-07-21 17:04:24,013 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFdeg [2022-07-21 17:04:24,013 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFdeg [2022-07-21 17:04:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 17:04:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:04:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:04:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFnew [2022-07-21 17:04:24,014 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFnew [2022-07-21 17:04:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFfree [2022-07-21 17:04:24,015 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFfree [2022-07-21 17:04:24,015 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFshift_add [2022-07-21 17:04:24,015 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFshift_add [2022-07-21 17:04:24,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:04:24,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 17:04:24,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:04:24,016 INFO L130 BoogieDeclarations]: Found specification of procedure FFmul [2022-07-21 17:04:24,016 INFO L138 BoogieDeclarations]: Found implementation of procedure FFmul [2022-07-21 17:04:24,016 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFexgcd [2022-07-21 17:04:24,016 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFexgcd [2022-07-21 17:04:24,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:04:24,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:04:24,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:04:24,017 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFswap [2022-07-21 17:04:24,017 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFswap [2022-07-21 17:04:24,017 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFcopy [2022-07-21 17:04:24,017 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFcopy [2022-07-21 17:04:24,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:04:24,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:04:24,185 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:04:24,186 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:04:24,814 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:04:24,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:04:24,821 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:04:24,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:04:24 BoogieIcfgContainer [2022-07-21 17:04:24,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:04:24,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:04:24,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:04:24,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:04:24,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:04:23" (1/3) ... [2022-07-21 17:04:24,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dd2ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:04:24, skipping insertion in model container [2022-07-21 17:04:24,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:04:23" (2/3) ... [2022-07-21 17:04:24,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dd2ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:04:24, skipping insertion in model container [2022-07-21 17:04:24,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:04:24" (3/3) ... [2022-07-21 17:04:24,835 INFO L111 eAbstractionObserver]: Analyzing ICFG 20020406-1.i [2022-07-21 17:04:24,848 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:04:24,848 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-07-21 17:04:24,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:04:24,891 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@52bc768b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@73b2649c [2022-07-21 17:04:24,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-07-21 17:04:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:04:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 17:04:24,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:24,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 17:04:24,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:24,905 INFO L85 PathProgramCache]: Analyzing trace with hash 228226931, now seen corresponding path program 1 times [2022-07-21 17:04:24,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:24,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073862015] [2022-07-21 17:04:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:24,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:24,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:24,927 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) [2022-07-21 17:04:24,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:04:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:04:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:25,091 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 [2022-07-21 17:04:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:25,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:25,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073862015] [2022-07-21 17:04:25,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073862015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:25,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:25,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:04:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706504931] [2022-07-21 17:04:25,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:25,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:04:25,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:04:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:25,145 INFO L87 Difference]: Start difference. First operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:25,428 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2022-07-21 17:04:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:04:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-21 17:04:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:25,442 INFO L225 Difference]: With dead ends: 182 [2022-07-21 17:04:25,444 INFO L226 Difference]: Without dead ends: 180 [2022-07-21 17:04:25,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:25,449 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:25,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 344 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:04:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-21 17:04:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-07-21 17:04:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 87 states have (on average 1.6781609195402298) internal successors, (146), 139 states have internal predecessors, (146), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:04:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2022-07-21 17:04:25,520 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 5 [2022-07-21 17:04:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:25,521 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2022-07-21 17:04:25,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2022-07-21 17:04:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 17:04:25,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:25,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 17:04:25,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:25,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:25,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 228226932, now seen corresponding path program 1 times [2022-07-21 17:04:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:25,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033779250] [2022-07-21 17:04:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:25,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:25,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:25,735 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) [2022-07-21 17:04:25,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:04:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:25,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:04:25,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:25,826 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 [2022-07-21 17:04:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:25,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:25,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033779250] [2022-07-21 17:04:25,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033779250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:25,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:25,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:04:25,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580850712] [2022-07-21 17:04:25,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:04:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:04:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:25,837 INFO L87 Difference]: Start difference. First operand 180 states and 216 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:26,129 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-07-21 17:04:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:04:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-21 17:04:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:26,132 INFO L225 Difference]: With dead ends: 184 [2022-07-21 17:04:26,132 INFO L226 Difference]: Without dead ends: 184 [2022-07-21 17:04:26,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:04:26,134 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 6 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:26,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:04:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-21 17:04:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2022-07-21 17:04:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 89 states have (on average 1.651685393258427) internal successors, (147), 140 states have internal predecessors, (147), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:04:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 217 transitions. [2022-07-21 17:04:26,147 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 217 transitions. Word has length 5 [2022-07-21 17:04:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:26,147 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 217 transitions. [2022-07-21 17:04:26,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 217 transitions. [2022-07-21 17:04:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:04:26,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:26,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:26,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:26,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting DUPFFnewErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash 282747829, now seen corresponding path program 1 times [2022-07-21 17:04:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:26,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518297906] [2022-07-21 17:04:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:26,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:26,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:26,364 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) [2022-07-21 17:04:26,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:04:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:04:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:26,468 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 [2022-07-21 17:04:26,473 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 [2022-07-21 17:04:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:26,545 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 [2022-07-21 17:04:26,559 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:04:26,560 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 [2022-07-21 17:04:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:26,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:26,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:26,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518297906] [2022-07-21 17:04:26,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518297906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:26,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:26,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:04:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111429827] [2022-07-21 17:04:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:26,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:04:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:04:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:04:26,581 INFO L87 Difference]: Start difference. First operand 181 states and 217 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:26,812 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2022-07-21 17:04:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:04:26,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:04:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:26,814 INFO L225 Difference]: With dead ends: 177 [2022-07-21 17:04:26,815 INFO L226 Difference]: Without dead ends: 177 [2022-07-21 17:04:26,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:04:26,816 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 33 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:26,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 342 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:04:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-21 17:04:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2022-07-21 17:04:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 87 states have (on average 1.6206896551724137) internal successors, (141), 134 states have internal predecessors, (141), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:04:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2022-07-21 17:04:26,831 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 7 [2022-07-21 17:04:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:26,831 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2022-07-21 17:04:26,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2022-07-21 17:04:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:04:26,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:26,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:26,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:27,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting DUPFFnewErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1865414411, now seen corresponding path program 1 times [2022-07-21 17:04:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:27,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925247884] [2022-07-21 17:04:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:27,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:27,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:27,042 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) [2022-07-21 17:04:27,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:04:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:27,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:04:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:27,124 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 [2022-07-21 17:04:27,134 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 [2022-07-21 17:04:27,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 17:04:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:27,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:27,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925247884] [2022-07-21 17:04:27,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925247884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:27,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:27,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:04:27,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179468379] [2022-07-21 17:04:27,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:27,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:04:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:27,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:04:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:04:27,174 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:27,725 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2022-07-21 17:04:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:04:27,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 17:04:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:27,730 INFO L225 Difference]: With dead ends: 186 [2022-07-21 17:04:27,730 INFO L226 Difference]: Without dead ends: 186 [2022-07-21 17:04:27,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:04:27,731 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 28 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:27,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 811 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:04:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-21 17:04:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-07-21 17:04:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 87 states have (on average 1.6091954022988506) internal successors, (140), 133 states have internal predecessors, (140), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:04:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2022-07-21 17:04:27,742 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 11 [2022-07-21 17:04:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:27,742 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2022-07-21 17:04:27,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2022-07-21 17:04:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:04:27,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:27,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:27,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:27,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:27,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1993271845, now seen corresponding path program 1 times [2022-07-21 17:04:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:27,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785113320] [2022-07-21 17:04:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:27,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:27,945 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) [2022-07-21 17:04:27,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:04:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:28,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:04:28,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:28,050 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 10 treesize of output 9 [2022-07-21 17:04:28,092 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 [2022-07-21 17:04:28,102 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 [2022-07-21 17:04:28,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:04:28,173 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 [2022-07-21 17:04:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:28,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:28,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:28,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785113320] [2022-07-21 17:04:28,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785113320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:28,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:28,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:04:28,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749304891] [2022-07-21 17:04:28,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:28,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:04:28,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:28,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:04:28,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:04:28,229 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:28,940 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2022-07-21 17:04:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:04:28,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:04:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:28,945 INFO L225 Difference]: With dead ends: 197 [2022-07-21 17:04:28,945 INFO L226 Difference]: Without dead ends: 197 [2022-07-21 17:04:28,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:04:28,946 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 50 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:28,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1053 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:04:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-21 17:04:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2022-07-21 17:04:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 102 states have (on average 1.5294117647058822) internal successors, (156), 148 states have internal predecessors, (156), 35 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:04:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2022-07-21 17:04:28,959 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 12 [2022-07-21 17:04:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:28,960 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2022-07-21 17:04:28,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2022-07-21 17:04:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 17:04:28,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:28,961 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] [2022-07-21 17:04:28,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:29,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash 335042805, now seen corresponding path program 1 times [2022-07-21 17:04:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:29,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937212700] [2022-07-21 17:04:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:29,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:29,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:29,170 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) [2022-07-21 17:04:29,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:04:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:04:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:29,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:29,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:29,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937212700] [2022-07-21 17:04:29,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937212700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:29,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:29,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:04:29,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316502571] [2022-07-21 17:04:29,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:04:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:04:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:04:29,368 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:04:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:29,542 INFO L93 Difference]: Finished difference Result 209 states and 253 transitions. [2022-07-21 17:04:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:04:29,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-21 17:04:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:29,546 INFO L225 Difference]: With dead ends: 209 [2022-07-21 17:04:29,546 INFO L226 Difference]: Without dead ends: 203 [2022-07-21 17:04:29,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:04:29,546 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 43 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:29,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 757 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:04:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-21 17:04:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2022-07-21 17:04:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 109 states have (on average 1.5045871559633028) internal successors, (164), 156 states have internal predecessors, (164), 35 states have call successors, (35), 9 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-07-21 17:04:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2022-07-21 17:04:29,562 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 21 [2022-07-21 17:04:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:29,562 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2022-07-21 17:04:29,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:04:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2022-07-21 17:04:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:04:29,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:29,566 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] [2022-07-21 17:04:29,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:29,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:29,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:29,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:29,772 INFO L85 PathProgramCache]: Analyzing trace with hash 370721495, now seen corresponding path program 1 times [2022-07-21 17:04:29,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:29,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850384566] [2022-07-21 17:04:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:29,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:29,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:29,774 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) [2022-07-21 17:04:29,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:04:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:29,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:04:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:29,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:30,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850384566] [2022-07-21 17:04:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850384566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:30,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:04:30,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-21 17:04:30,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53406092] [2022-07-21 17:04:30,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:30,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:04:30,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:04:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:04:30,180 INFO L87 Difference]: Start difference. First operand 198 states and 238 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:04:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:30,713 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2022-07-21 17:04:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:04:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-21 17:04:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:30,716 INFO L225 Difference]: With dead ends: 246 [2022-07-21 17:04:30,717 INFO L226 Difference]: Without dead ends: 234 [2022-07-21 17:04:30,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:04:30,718 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 153 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:30,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1351 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:04:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-21 17:04:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2022-07-21 17:04:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.4960629921259843) internal successors, (190), 173 states have internal predecessors, (190), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-07-21 17:04:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 264 transitions. [2022-07-21 17:04:30,727 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 264 transitions. Word has length 22 [2022-07-21 17:04:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:30,728 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 264 transitions. [2022-07-21 17:04:30,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:04:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 264 transitions. [2022-07-21 17:04:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:04:30,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:30,729 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:30,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:30,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:30,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash -843792011, now seen corresponding path program 2 times [2022-07-21 17:04:30,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:30,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270921305] [2022-07-21 17:04:30,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:04:30,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:30,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:30,941 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) [2022-07-21 17:04:30,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:04:31,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:04:31,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:04:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:04:31,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:31,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270921305] [2022-07-21 17:04:31,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270921305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:31,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:31,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:04:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808794819] [2022-07-21 17:04:31,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:31,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:04:31,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:04:31,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:04:31,080 INFO L87 Difference]: Start difference. First operand 216 states and 264 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:04:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:31,426 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2022-07-21 17:04:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:04:31,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-21 17:04:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:31,440 INFO L225 Difference]: With dead ends: 214 [2022-07-21 17:04:31,440 INFO L226 Difference]: Without dead ends: 214 [2022-07-21 17:04:31,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:04:31,441 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 23 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:31,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 756 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:04:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-21 17:04:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-07-21 17:04:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 127 states have (on average 1.4803149606299213) internal successors, (188), 171 states have internal predecessors, (188), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-07-21 17:04:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2022-07-21 17:04:31,454 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 25 [2022-07-21 17:04:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:31,454 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2022-07-21 17:04:31,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:04:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2022-07-21 17:04:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:04:31,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:31,456 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:31,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:31,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:31,666 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -843792010, now seen corresponding path program 1 times [2022-07-21 17:04:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841201918] [2022-07-21 17:04:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:31,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:31,669 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) [2022-07-21 17:04:31,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:04:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:04:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:31,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:04:32,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841201918] [2022-07-21 17:04:32,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841201918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:32,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:04:32,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-21 17:04:32,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001691293] [2022-07-21 17:04:32,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:32,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:04:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:04:32,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:04:32,306 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:04:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:33,574 INFO L93 Difference]: Finished difference Result 285 states and 358 transitions. [2022-07-21 17:04:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:04:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-21 17:04:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:33,577 INFO L225 Difference]: With dead ends: 285 [2022-07-21 17:04:33,577 INFO L226 Difference]: Without dead ends: 267 [2022-07-21 17:04:33,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:04:33,578 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 231 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:33,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1817 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:04:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-21 17:04:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 222. [2022-07-21 17:04:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 134 states have (on average 1.4402985074626866) internal successors, (193), 179 states have internal predecessors, (193), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-21 17:04:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 268 transitions. [2022-07-21 17:04:33,595 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 268 transitions. Word has length 25 [2022-07-21 17:04:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:33,596 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 268 transitions. [2022-07-21 17:04:33,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:04:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 268 transitions. [2022-07-21 17:04:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:04:33,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:33,598 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:33,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:33,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:33,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash 168356342, now seen corresponding path program 2 times [2022-07-21 17:04:33,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:33,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347990618] [2022-07-21 17:04:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:04:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:33,810 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) [2022-07-21 17:04:33,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:04:33,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:04:33,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:33,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:04:33,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 17:04:34,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:04:34,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347990618] [2022-07-21 17:04:34,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347990618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:04:34,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:04:34,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:04:34,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594429232] [2022-07-21 17:04:34,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:04:34,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:04:34,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:04:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:04:34,064 INFO L87 Difference]: Start difference. First operand 222 states and 268 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:04:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:34,439 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2022-07-21 17:04:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:04:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-07-21 17:04:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:34,441 INFO L225 Difference]: With dead ends: 220 [2022-07-21 17:04:34,441 INFO L226 Difference]: Without dead ends: 220 [2022-07-21 17:04:34,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:04:34,442 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:34,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 809 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:04:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-21 17:04:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-07-21 17:04:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 134 states have (on average 1.4253731343283582) internal successors, (191), 177 states have internal predecessors, (191), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-21 17:04:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 266 transitions. [2022-07-21 17:04:34,453 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 266 transitions. Word has length 29 [2022-07-21 17:04:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:34,453 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 266 transitions. [2022-07-21 17:04:34,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:04:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 266 transitions. [2022-07-21 17:04:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:04:34,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:34,456 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:34,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:34,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash 924079462, now seen corresponding path program 1 times [2022-07-21 17:04:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:34,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587262585] [2022-07-21 17:04:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:34,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:34,671 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) [2022-07-21 17:04:34,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:04:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:34,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:04:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:34,940 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 [2022-07-21 17:04:34,966 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:04:34,967 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 [2022-07-21 17:04:34,986 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 [2022-07-21 17:04:35,098 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,098 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 37 treesize of output 35 [2022-07-21 17:04:35,124 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,124 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 37 treesize of output 35 [2022-07-21 17:04:35,170 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,170 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 37 treesize of output 35 [2022-07-21 17:04:35,195 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,196 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 37 treesize of output 35 [2022-07-21 17:04:35,221 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,222 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 37 treesize of output 35 [2022-07-21 17:04:35,249 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,249 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 37 treesize of output 35 [2022-07-21 17:04:35,272 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,273 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 37 treesize of output 35 [2022-07-21 17:04:35,298 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:35,299 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 34 treesize of output 35 [2022-07-21 17:04:35,414 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-21 17:04:35,415 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 4 case distinctions, treesize of input 48 treesize of output 53 [2022-07-21 17:04:35,515 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-21 17:04:35,515 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 4 case distinctions, treesize of input 50 treesize of output 55 [2022-07-21 17:04:35,619 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 [2022-07-21 17:04:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:04:35,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:36,993 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_DUPFFnew_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_552) |c_DUPFFnew_~ans~0#1.base|) (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-21 17:04:37,092 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_~ans~0#1.base|) .cse0) v_ArrVal_552) |c_DUPFFnew_~ans~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2022-07-21 17:04:37,103 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:37,104 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-21 17:04:37,107 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 28 [2022-07-21 17:04:37,110 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 [2022-07-21 17:04:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 8 not checked. [2022-07-21 17:04:41,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:04:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587262585] [2022-07-21 17:04:41,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587262585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:41,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:04:41,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-21 17:04:41,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769365919] [2022-07-21 17:04:41,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:41,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:04:41,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:04:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:04:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=287, Unknown=4, NotChecked=70, Total=420 [2022-07-21 17:04:41,221 INFO L87 Difference]: Start difference. First operand 220 states and 266 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:04:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:42,409 INFO L93 Difference]: Finished difference Result 219 states and 265 transitions. [2022-07-21 17:04:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:04:42,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-21 17:04:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:42,412 INFO L225 Difference]: With dead ends: 219 [2022-07-21 17:04:42,412 INFO L226 Difference]: Without dead ends: 219 [2022-07-21 17:04:42,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=91, Invalid=419, Unknown=4, NotChecked=86, Total=600 [2022-07-21 17:04:42,413 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 30 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2138 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:42,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2138 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 394 Unchecked, 0.9s Time] [2022-07-21 17:04:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-21 17:04:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-07-21 17:04:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 134 states have (on average 1.4179104477611941) internal successors, (190), 176 states have internal predecessors, (190), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-21 17:04:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2022-07-21 17:04:42,423 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 30 [2022-07-21 17:04:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:42,424 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2022-07-21 17:04:42,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:04:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2022-07-21 17:04:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:04:42,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:42,429 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:42,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:42,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:04:42,643 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:04:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash 924079463, now seen corresponding path program 1 times [2022-07-21 17:04:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:04:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078743043] [2022-07-21 17:04:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:42,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:04:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:04:42,645 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) [2022-07-21 17:04:42,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:04:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:04:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:42,912 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:04:42,940 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:04:42,941 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 [2022-07-21 17:04:42,947 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 10 treesize of output 9 [2022-07-21 17:04:42,986 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 [2022-07-21 17:04:42,992 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 [2022-07-21 17:04:43,152 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:04:43,153 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 16 treesize of output 22 [2022-07-21 17:04:43,161 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 7 treesize of output 3 [2022-07-21 17:04:43,186 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,187 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 41 treesize of output 39 [2022-07-21 17:04:43,234 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,234 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 41 treesize of output 39 [2022-07-21 17:04:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,252 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 16 treesize of output 18 [2022-07-21 17:04:43,274 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,274 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 41 treesize of output 39 [2022-07-21 17:04:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,291 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 16 treesize of output 18 [2022-07-21 17:04:43,313 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,313 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 41 treesize of output 39 [2022-07-21 17:04:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,332 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 16 treesize of output 18 [2022-07-21 17:04:43,356 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:04:43,356 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 16 treesize of output 22 [2022-07-21 17:04:43,364 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 7 treesize of output 3 [2022-07-21 17:04:43,388 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,388 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 41 treesize of output 39 [2022-07-21 17:04:43,436 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,436 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 41 treesize of output 39 [2022-07-21 17:04:43,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,454 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 16 treesize of output 18 [2022-07-21 17:04:43,475 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,476 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 41 treesize of output 39 [2022-07-21 17:04:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,494 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 16 treesize of output 18 [2022-07-21 17:04:43,523 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:04:43,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-07-21 17:04:43,530 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 [2022-07-21 17:04:43,658 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-21 17:04:43,658 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 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-21 17:04:43,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 57 [2022-07-21 17:04:43,785 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-21 17:04:43,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-21 17:04:43,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:43,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-07-21 17:04:43,926 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 [2022-07-21 17:04:43,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-21 17:04:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:04:43,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:05:08,894 WARN L233 SmtUtils]: Spent 24.75s on a formula simplification that was a NOOP. DAG size: 194 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-07-21 17:05:13,557 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 17:05:13,558 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 1 [2022-07-21 17:05:13,566 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 17:05:13,566 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 1 [2022-07-21 17:05:14,689 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:05:14,689 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-07-21 17:05:14,692 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 54 treesize of output 36 [2022-07-21 17:05:14,698 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 19 treesize of output 11 [2022-07-21 17:05:14,716 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:05:14,716 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-07-21 17:05:14,726 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:05:14,727 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-21 17:05:14,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:05:14,735 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 33 treesize of output 21 [2022-07-21 17:05:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:05:14,741 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 24 treesize of output 12 [2022-07-21 17:05:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:05:14,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:05:14,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078743043] [2022-07-21 17:05:14,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078743043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:05:14,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:05:14,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-21 17:05:14,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685706529] [2022-07-21 17:05:14,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:05:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:05:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:05:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:05:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=358, Unknown=7, NotChecked=0, Total=420 [2022-07-21 17:05:14,986 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:05:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:17,745 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2022-07-21 17:05:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:05:17,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-21 17:05:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:17,747 INFO L225 Difference]: With dead ends: 220 [2022-07-21 17:05:17,747 INFO L226 Difference]: Without dead ends: 220 [2022-07-21 17:05:17,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=144, Invalid=841, Unknown=7, NotChecked=0, Total=992 [2022-07-21 17:05:17,748 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 37 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:17,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2237 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 688 Invalid, 0 Unknown, 137 Unchecked, 1.9s Time] [2022-07-21 17:05:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-21 17:05:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2022-07-21 17:05:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 134 states have (on average 1.4104477611940298) internal successors, (189), 175 states have internal predecessors, (189), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-21 17:05:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 264 transitions. [2022-07-21 17:05:17,755 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 264 transitions. Word has length 30 [2022-07-21 17:05:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:17,755 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 264 transitions. [2022-07-21 17:05:17,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:05:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 264 transitions. [2022-07-21 17:05:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:05:17,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:17,756 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:05:17,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:05:17,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:05:17,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:05:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2092985884, now seen corresponding path program 1 times [2022-07-21 17:05:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:05:17,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90962321] [2022-07-21 17:05:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:05:17,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:05:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:05:17,970 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) [2022-07-21 17:05:17,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 17:05:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:05:18,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:05:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:05:18,186 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 10 treesize of output 9 [2022-07-21 17:05:18,205 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 [2022-07-21 17:05:18,210 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 [2022-07-21 17:05:18,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:05:18,245 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 [2022-07-21 17:05:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 17:05:18,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:05:18,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:05:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90962321] [2022-07-21 17:05:18,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90962321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:05:18,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:05:18,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:05:18,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350156935] [2022-07-21 17:05:18,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:05:18,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:05:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:05:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:05:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:05:18,291 INFO L87 Difference]: Start difference. First operand 218 states and 264 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:05:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:18,953 INFO L93 Difference]: Finished difference Result 230 states and 271 transitions. [2022-07-21 17:05:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:05:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-07-21 17:05:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:18,955 INFO L225 Difference]: With dead ends: 230 [2022-07-21 17:05:18,955 INFO L226 Difference]: Without dead ends: 218 [2022-07-21 17:05:18,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:05:18,956 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 51 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:18,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 902 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:05:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-21 17:05:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2022-07-21 17:05:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 130 states have (on average 1.376923076923077) internal successors, (179), 170 states have internal predecessors, (179), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:05:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 249 transitions. [2022-07-21 17:05:18,962 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 249 transitions. Word has length 42 [2022-07-21 17:05:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:18,963 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 249 transitions. [2022-07-21 17:05:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:05:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 249 transitions. [2022-07-21 17:05:18,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:05:18,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:18,963 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:05:18,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:05:19,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:05:19,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:05:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:19,164 INFO L85 PathProgramCache]: Analyzing trace with hash -562772518, now seen corresponding path program 1 times [2022-07-21 17:05:19,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:05:19,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819613044] [2022-07-21 17:05:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:05:19,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:05:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:05:19,167 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) [2022-07-21 17:05:19,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:05:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:05:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:05:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:05:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 17:05:19,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:05:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 17:05:20,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:05:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819613044] [2022-07-21 17:05:20,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819613044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:05:20,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:05:20,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-21 17:05:20,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519257178] [2022-07-21 17:05:20,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:05:20,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 17:05:20,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:05:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 17:05:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:05:20,044 INFO L87 Difference]: Start difference. First operand 213 states and 249 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:05:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:21,732 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2022-07-21 17:05:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 17:05:21,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-07-21 17:05:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:21,734 INFO L225 Difference]: With dead ends: 291 [2022-07-21 17:05:21,734 INFO L226 Difference]: Without dead ends: 279 [2022-07-21 17:05:21,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=641, Invalid=1521, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 17:05:21,736 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 232 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:21,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 2355 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 17:05:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-21 17:05:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 220. [2022-07-21 17:05:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 177 states have internal predecessors, (186), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:05:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2022-07-21 17:05:21,744 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 56 [2022-07-21 17:05:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:21,744 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2022-07-21 17:05:21,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:05:21,744 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2022-07-21 17:05:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:05:21,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:21,745 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:05:21,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:05:21,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:05:21,959 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:05:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093162, now seen corresponding path program 2 times [2022-07-21 17:05:21,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:05:21,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722301615] [2022-07-21 17:05:21,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:05:21,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:05:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:05:21,962 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) [2022-07-21 17:05:21,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 17:05:22,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:05:22,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:05:22,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:05:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:05:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-07-21 17:05:22,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:05:22,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:05:22,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722301615] [2022-07-21 17:05:22,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722301615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:05:22,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:05:22,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:05:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616741013] [2022-07-21 17:05:22,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:05:22,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:05:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:05:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:05:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:05:22,179 INFO L87 Difference]: Start difference. First operand 220 states and 256 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:05:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:22,658 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2022-07-21 17:05:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:05:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-07-21 17:05:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:22,661 INFO L225 Difference]: With dead ends: 218 [2022-07-21 17:05:22,661 INFO L226 Difference]: Without dead ends: 218 [2022-07-21 17:05:22,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:05:22,662 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:22,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 738 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:05:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-21 17:05:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-07-21 17:05:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 175 states have internal predecessors, (184), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:05:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-07-21 17:05:22,673 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 63 [2022-07-21 17:05:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:22,673 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-07-21 17:05:22,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:05:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-07-21 17:05:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:05:22,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:22,674 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:05:22,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:05:22,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:05:22,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:05:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093161, now seen corresponding path program 1 times [2022-07-21 17:05:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:05:22,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204717593] [2022-07-21 17:05:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:05:22,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:05:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:05:22,887 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) [2022-07-21 17:05:22,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:05:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:05:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:05:23,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:05:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 17:05:23,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:05:23,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:05:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204717593] [2022-07-21 17:05:23,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204717593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:05:23,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:05:23,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:05:23,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166148430] [2022-07-21 17:05:23,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:05:23,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:05:23,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:05:23,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:05:23,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:05:23,350 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:05:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:23,793 INFO L93 Difference]: Finished difference Result 216 states and 252 transitions. [2022-07-21 17:05:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:05:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-07-21 17:05:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:23,795 INFO L225 Difference]: With dead ends: 216 [2022-07-21 17:05:23,795 INFO L226 Difference]: Without dead ends: 216 [2022-07-21 17:05:23,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:05:23,796 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 21 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:23,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 922 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:05:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-21 17:05:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-21 17:05:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 137 states have (on average 1.3284671532846715) internal successors, (182), 173 states have internal predecessors, (182), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:05:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 252 transitions. [2022-07-21 17:05:23,802 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 252 transitions. Word has length 63 [2022-07-21 17:05:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:23,810 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 252 transitions. [2022-07-21 17:05:23,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:05:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 252 transitions. [2022-07-21 17:05:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:05:23,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:23,811 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:05:23,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:05:24,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:05:24,012 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:05:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash -585378383, now seen corresponding path program 1 times [2022-07-21 17:05:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:05:24,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400244179] [2022-07-21 17:05:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:05:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:05:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:05:24,015 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) [2022-07-21 17:05:24,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 17:05:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:05:24,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:05:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:05:24,738 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 [2022-07-21 17:05:24,777 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:05:24,778 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 [2022-07-21 17:05:24,803 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 [2022-07-21 17:05:24,931 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:24,932 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 37 treesize of output 35 [2022-07-21 17:05:24,957 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:24,958 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 37 treesize of output 35 [2022-07-21 17:05:24,981 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:24,981 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-21 17:05:25,011 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,012 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 37 treesize of output 35 [2022-07-21 17:05:25,034 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-21 17:05:25,061 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,062 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 37 treesize of output 35 [2022-07-21 17:05:25,083 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,083 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 37 treesize of output 35 [2022-07-21 17:05:25,106 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-21 17:05:25,138 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,138 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 37 treesize of output 35 [2022-07-21 17:05:25,163 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-21 17:05:25,188 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,188 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 37 treesize of output 35 [2022-07-21 17:05:25,213 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:25,213 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 34 treesize of output 35 [2022-07-21 17:05:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2022-07-21 17:05:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:25,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 55 [2022-07-21 17:05:25,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:05:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-21 17:05:25,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:05:27,092 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1933 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_~ans~0#1.base|) .cse0) v_ArrVal_1933) |c_DUPFFnew_~ans~0#1.base|) .cse0))))) is different from false [2022-07-21 17:05:27,099 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:05:27,100 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-21 17:05:27,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-07-21 17:05:27,107 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 [2022-07-21 17:05:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-21 17:05:33,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:05:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400244179] [2022-07-21 17:05:33,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400244179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:05:33,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:05:33,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-21 17:05:33,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942766855] [2022-07-21 17:05:33,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:05:33,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:05:33,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:05:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:05:33,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=4, NotChecked=36, Total=420 [2022-07-21 17:05:33,453 INFO L87 Difference]: Start difference. First operand 216 states and 252 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:05:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:05:34,554 INFO L93 Difference]: Finished difference Result 220 states and 259 transitions. [2022-07-21 17:05:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:05:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-07-21 17:05:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:05:34,556 INFO L225 Difference]: With dead ends: 220 [2022-07-21 17:05:34,556 INFO L226 Difference]: Without dead ends: 220 [2022-07-21 17:05:34,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=4, NotChecked=44, Total=600 [2022-07-21 17:05:34,557 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 29 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:05:34,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2219 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 584 Invalid, 0 Unknown, 388 Unchecked, 1.0s Time] [2022-07-21 17:05:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-21 17:05:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2022-07-21 17:05:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 137 states have (on average 1.3211678832116789) internal successors, (181), 172 states have internal predecessors, (181), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:05:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 251 transitions. [2022-07-21 17:05:34,562 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 251 transitions. Word has length 64 [2022-07-21 17:05:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:05:34,563 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 251 transitions. [2022-07-21 17:05:34,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:05:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 251 transitions. [2022-07-21 17:05:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:05:34,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:05:34,564 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:05:34,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-21 17:05:34,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:05:34,781 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:05:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:05:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash -585378382, now seen corresponding path program 1 times [2022-07-21 17:05:34,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:05:34,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222473827] [2022-07-21 17:05:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:05:34,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:05:34,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:05:34,784 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) [2022-07-21 17:05:34,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 17:05:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:05:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 17:05:35,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:05:35,415 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 [2022-07-21 17:05:35,439 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 10 treesize of output 9 [2022-07-21 17:05:35,457 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:05:35,457 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 [2022-07-21 17:05:35,492 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 [2022-07-21 17:05:35,500 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 [2022-07-21 17:05:35,663 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:35,663 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 41 treesize of output 39 [2022-07-21 17:05:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:35,675 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 16 treesize of output 18 [2022-07-21 17:05:35,691 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:05:35,691 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 16 treesize of output 22 [2022-07-21 17:05:35,696 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 7 treesize of output 3 [2022-07-21 17:05:35,713 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:35,714 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 41 treesize of output 39 [2022-07-21 17:05:35,747 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:35,747 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 41 treesize of output 39 [2022-07-21 17:05:35,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:35,759 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 16 treesize of output 18 [2022-07-21 17:05:35,784 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:05:35,784 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 16 treesize of output 22 [2022-07-21 17:05:35,788 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 7 treesize of output 3 [2022-07-21 17:05:35,805 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:35,805 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 41 treesize of output 39 [2022-07-21 17:05:35,842 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:35,843 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 41 treesize of output 39 [2022-07-21 17:05:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:35,859 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 16 treesize of output 18 [2022-07-21 17:05:35,882 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:05:35,883 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 16 treesize of output 22 [2022-07-21 17:05:35,889 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 7 treesize of output 3 [2022-07-21 17:05:35,912 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:35,912 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 41 treesize of output 39 [2022-07-21 17:05:35,959 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:05:35,960 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 16 treesize of output 22 [2022-07-21 17:05:35,967 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 7 treesize of output 3 [2022-07-21 17:05:35,989 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:35,989 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 41 treesize of output 39 [2022-07-21 17:05:36,035 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:36,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-21 17:05:36,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,055 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 16 treesize of output 18 [2022-07-21 17:05:36,075 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:05:36,075 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 16 treesize of output 22 [2022-07-21 17:05:36,078 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 7 treesize of output 3 [2022-07-21 17:05:36,097 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:36,097 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 41 treesize of output 39 [2022-07-21 17:05:36,133 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:05:36,133 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 16 treesize of output 22 [2022-07-21 17:05:36,138 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 7 treesize of output 3 [2022-07-21 17:05:36,156 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:36,156 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 41 treesize of output 39 [2022-07-21 17:05:36,193 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:36,193 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 41 treesize of output 39 [2022-07-21 17:05:36,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,210 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 16 treesize of output 18 [2022-07-21 17:05:36,234 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:05:36,234 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 50 treesize of output 49 [2022-07-21 17:05:36,239 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 [2022-07-21 17:05:36,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-21 17:05:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 57 [2022-07-21 17:05:36,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2022-07-21 17:05:36,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:05:36,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-07-21 17:05:36,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:05:36,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:05:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-21 17:05:36,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:06:27,613 WARN L233 SmtUtils]: Spent 50.80s on a formula simplification that was a NOOP. DAG size: 227 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-07-21 17:06:32,654 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:06:32,654 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2022-07-21 17:06:32,661 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:06:32,661 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2022-07-21 17:06:33,878 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:06:33,878 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-07-21 17:06:33,880 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 54 treesize of output 36 [2022-07-21 17:06:33,886 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 19 treesize of output 11 [2022-07-21 17:06:33,904 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:06:33,904 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-07-21 17:06:33,914 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:06:33,914 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-21 17:06:33,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:06:33,921 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 33 treesize of output 21 [2022-07-21 17:06:33,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:06:33,927 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 24 treesize of output 12 [2022-07-21 17:06:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:06:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-21 17:06:34,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:06:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222473827] [2022-07-21 17:06:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222473827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:06:34,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:06:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-21 17:06:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711136972] [2022-07-21 17:06:34,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:06:34,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:06:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:06:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:06:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=358, Unknown=7, NotChecked=0, Total=420 [2022-07-21 17:06:34,169 INFO L87 Difference]: Start difference. First operand 215 states and 251 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:06:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:06:37,604 INFO L93 Difference]: Finished difference Result 221 states and 261 transitions. [2022-07-21 17:06:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:06:37,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-07-21 17:06:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:06:37,606 INFO L225 Difference]: With dead ends: 221 [2022-07-21 17:06:37,606 INFO L226 Difference]: Without dead ends: 221 [2022-07-21 17:06:37,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=104, Invalid=645, Unknown=7, NotChecked=0, Total=756 [2022-07-21 17:06:37,607 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 33 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:06:37,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1790 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 580 Invalid, 0 Unknown, 277 Unchecked, 2.4s Time] [2022-07-21 17:06:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-21 17:06:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2022-07-21 17:06:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 137 states have (on average 1.313868613138686) internal successors, (180), 171 states have internal predecessors, (180), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 17:06:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 250 transitions. [2022-07-21 17:06:37,618 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 250 transitions. Word has length 64 [2022-07-21 17:06:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:06:37,618 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 250 transitions. [2022-07-21 17:06:37,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:06:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 250 transitions. [2022-07-21 17:06:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 17:06:37,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:06:37,619 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:06:37,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:06:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:06:37,840 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:06:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:06:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1825741073, now seen corresponding path program 1 times [2022-07-21 17:06:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:06:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727395261] [2022-07-21 17:06:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:06:37,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:06:37,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:06:37,842 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) [2022-07-21 17:06:37,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 17:06:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:06:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:06:38,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:06:38,537 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 [2022-07-21 17:06:38,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:06:38,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:06:38,928 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-21 17:06:38,929 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 4 case distinctions, treesize of input 20 treesize of output 36 [2022-07-21 17:06:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 128 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-21 17:06:39,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:06:41,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:06:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727395261] [2022-07-21 17:06:41,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727395261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:06:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1944466304] [2022-07-21 17:06:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:06:41,215 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:06:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:06:41,217 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:06:41,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-21 17:06:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:06:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:06:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:06:49,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:06:49,142 INFO L356 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-07-21 17:06:49,143 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 2 case distinctions, treesize of input 15 treesize of output 29 [2022-07-21 17:06:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-21 17:06:49,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:06:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1944466304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:06:49,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:06:49,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [15] total 21 [2022-07-21 17:06:49,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730334862] [2022-07-21 17:06:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:06:49,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:06:49,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:06:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:06:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=445, Unknown=3, NotChecked=0, Total=506 [2022-07-21 17:06:49,212 INFO L87 Difference]: Start difference. First operand 214 states and 250 transitions. Second operand has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:06:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:06:50,265 INFO L93 Difference]: Finished difference Result 253 states and 304 transitions. [2022-07-21 17:06:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:06:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-07-21 17:06:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:06:50,267 INFO L225 Difference]: With dead ends: 253 [2022-07-21 17:06:50,267 INFO L226 Difference]: Without dead ends: 253 [2022-07-21 17:06:50,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=66, Invalid=531, Unknown=3, NotChecked=0, Total=600 [2022-07-21 17:06:50,268 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 72 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:06:50,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1377 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 706 Invalid, 0 Unknown, 524 Unchecked, 1.0s Time] [2022-07-21 17:06:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-21 17:06:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2022-07-21 17:06:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 152 states have (on average 1.3289473684210527) internal successors, (202), 187 states have internal predecessors, (202), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-21 17:06:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 282 transitions. [2022-07-21 17:06:50,276 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 282 transitions. Word has length 71 [2022-07-21 17:06:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:06:50,276 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 282 transitions. [2022-07-21 17:06:50,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:06:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 282 transitions. [2022-07-21 17:06:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 17:06:50,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:06:50,277 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:06:50,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:06:50,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:06:50,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:06:50,696 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:06:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:06:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1825741072, now seen corresponding path program 1 times [2022-07-21 17:06:50,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:06:50,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706951664] [2022-07-21 17:06:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:06:50,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:06:50,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:06:50,699 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) [2022-07-21 17:06:50,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 17:06:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:06:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 17:06:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:06:51,813 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 [2022-07-21 17:06:51,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-21 17:06:52,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:06:52,257 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-21 17:06:52,257 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-21 17:06:52,269 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:06:52,269 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 [2022-07-21 17:06:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-21 17:06:52,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:07:19,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706951664] [2022-07-21 17:07:19,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706951664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:07:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464557931] [2022-07-21 17:07:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:07:19,216 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:07:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:07:19,218 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:07:19,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-21 17:07:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:07:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 17:07:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:21,378 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 [2022-07-21 17:07:21,387 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 [2022-07-21 17:07:21,534 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:07:21,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 17:07:21,562 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:07:21,563 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 [2022-07-21 17:07:22,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:07:22,744 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-21 17:07:22,745 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-21 17:07:22,767 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:07:22,767 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 [2022-07-21 17:07:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-21 17:07:23,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:07:25,678 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_DUPFFnew_#t~malloc33#1.base_71| (_ BitVec 32)) (|v_DUPFFnew_~ans~0#1.base_63| (_ BitVec 32)) (v_ArrVal_3518 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~f~0#1.offset|))) (and (bvule (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~f~0#1.offset|) .cse0) (bvule .cse0 (select (store (store |c_#length| |v_DUPFFnew_~ans~0#1.base_63| v_ArrVal_3518) |v_DUPFFnew_#t~malloc33#1.base_71| (_ bv12 32)) |c_ULTIMATE.start_main_~f~0#1.base|)))) (not (= (select |c_#valid| |v_DUPFFnew_~ans~0#1.base_63|) (_ bv0 1))))) is different from false [2022-07-21 17:07:25,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1464557931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:07:25,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:07:25,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-07-21 17:07:25,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993198579] [2022-07-21 17:07:25,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:07:25,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 17:07:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 17:07:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1143, Unknown=11, NotChecked=68, Total=1332 [2022-07-21 17:07:25,688 INFO L87 Difference]: Start difference. First operand 236 states and 282 transitions. Second operand has 30 states, 27 states have (on average 2.962962962962963) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:07:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:07:28,999 INFO L93 Difference]: Finished difference Result 249 states and 298 transitions. [2022-07-21 17:07:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:07:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.962962962962963) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 71 [2022-07-21 17:07:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:07:29,002 INFO L225 Difference]: With dead ends: 249 [2022-07-21 17:07:29,003 INFO L226 Difference]: Without dead ends: 249 [2022-07-21 17:07:29,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=195, Invalid=1960, Unknown=11, NotChecked=90, Total=2256 [2022-07-21 17:07:29,004 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 71 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:07:29,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1472 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 840 Invalid, 0 Unknown, 768 Unchecked, 2.2s Time] [2022-07-21 17:07:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-21 17:07:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2022-07-21 17:07:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 156 states have (on average 1.3205128205128205) internal successors, (206), 191 states have internal predecessors, (206), 39 states have call successors, (39), 13 states have call predecessors, (39), 14 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-21 17:07:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 286 transitions. [2022-07-21 17:07:29,011 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 286 transitions. Word has length 71 [2022-07-21 17:07:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:07:29,011 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 286 transitions. [2022-07-21 17:07:29,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.962962962962963) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:07:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 286 transitions. [2022-07-21 17:07:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 17:07:29,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:07:29,013 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:07:29,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:07:29,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-07-21 17:07:29,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:07:29,428 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:07:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:07:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -242190254, now seen corresponding path program 1 times [2022-07-21 17:07:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:07:29,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049960244] [2022-07-21 17:07:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:07:29,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:07:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:07:29,430 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:07:29,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:07:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:07:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:07:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-21 17:07:30,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:07:30,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:30,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049960244] [2022-07-21 17:07:30,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049960244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:07:30,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:07:30,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:07:30,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756756189] [2022-07-21 17:07:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:07:30,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:07:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:07:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:07:30,195 INFO L87 Difference]: Start difference. First operand 241 states and 286 transitions. Second operand has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:07:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:07:30,896 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2022-07-21 17:07:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:07:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-07-21 17:07:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:07:30,898 INFO L225 Difference]: With dead ends: 247 [2022-07-21 17:07:30,898 INFO L226 Difference]: Without dead ends: 247 [2022-07-21 17:07:30,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:07:30,899 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 13 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:07:30,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 754 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 59 Unchecked, 0.6s Time] [2022-07-21 17:07:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-21 17:07:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-07-21 17:07:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 160 states have (on average 1.31875) internal successors, (211), 195 states have internal predecessors, (211), 39 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-21 17:07:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 291 transitions. [2022-07-21 17:07:30,905 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 291 transitions. Word has length 77 [2022-07-21 17:07:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:07:30,906 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 291 transitions. [2022-07-21 17:07:30,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:07:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 291 transitions. [2022-07-21 17:07:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 17:07:30,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:07:30,907 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:07:30,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:07:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:07:31,124 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:07:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:07:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash -242190253, now seen corresponding path program 1 times [2022-07-21 17:07:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:07:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276685958] [2022-07-21 17:07:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:07:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:07:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:07:31,126 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:07:31,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:07:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:07:31,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:07:31,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 17:07:32,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:07:32,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:32,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276685958] [2022-07-21 17:07:32,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276685958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:07:32,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:07:32,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:07:32,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287946259] [2022-07-21 17:07:32,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:07:32,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:07:32,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:32,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:07:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:07:32,209 INFO L87 Difference]: Start difference. First operand 246 states and 291 transitions. Second operand has 12 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:07:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:07:33,162 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2022-07-21 17:07:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:07:33,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-07-21 17:07:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:07:33,165 INFO L225 Difference]: With dead ends: 251 [2022-07-21 17:07:33,165 INFO L226 Difference]: Without dead ends: 251 [2022-07-21 17:07:33,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:07:33,165 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 37 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:07:33,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 826 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 56 Unchecked, 0.8s Time] [2022-07-21 17:07:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-21 17:07:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2022-07-21 17:07:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 160 states have (on average 1.3125) internal successors, (210), 195 states have internal predecessors, (210), 39 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-21 17:07:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 290 transitions. [2022-07-21 17:07:33,172 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 290 transitions. Word has length 77 [2022-07-21 17:07:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:07:33,172 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 290 transitions. [2022-07-21 17:07:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:07:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 290 transitions. [2022-07-21 17:07:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 17:07:33,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:07:33,173 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:07:33,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 17:07:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:07:33,374 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:07:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:07:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1668104532, now seen corresponding path program 1 times [2022-07-21 17:07:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:07:33,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90621409] [2022-07-21 17:07:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:07:33,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:07:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:07:33,378 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:07:33,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:07:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:07:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:07:34,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 17:07:34,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:07:34,959 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 8 treesize of output 6 [2022-07-21 17:07:35,213 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:07:35,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-07-21 17:07:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 3 proven. 136 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-21 17:07:36,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:36,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90621409] [2022-07-21 17:07:36,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90621409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:07:36,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:07:36,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-21 17:07:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584899915] [2022-07-21 17:07:36,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:07:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:07:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:07:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:07:36,019 INFO L87 Difference]: Start difference. First operand 246 states and 290 transitions. Second operand has 25 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 19 states have internal predecessors, (94), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:07:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:07:40,524 INFO L93 Difference]: Finished difference Result 345 states and 417 transitions. [2022-07-21 17:07:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:07:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 19 states have internal predecessors, (94), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 84 [2022-07-21 17:07:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:07:40,527 INFO L225 Difference]: With dead ends: 345 [2022-07-21 17:07:40,527 INFO L226 Difference]: Without dead ends: 345 [2022-07-21 17:07:40,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:07:40,528 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 313 mSDsluCounter, 2578 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:07:40,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 2770 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1135 Invalid, 0 Unknown, 102 Unchecked, 3.9s Time] [2022-07-21 17:07:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-21 17:07:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 313. [2022-07-21 17:07:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 199 states have (on average 1.3969849246231156) internal successors, (278), 235 states have internal predecessors, (278), 67 states have call successors, (67), 16 states have call predecessors, (67), 15 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-07-21 17:07:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 412 transitions. [2022-07-21 17:07:40,542 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 412 transitions. Word has length 84 [2022-07-21 17:07:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:07:40,543 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 412 transitions. [2022-07-21 17:07:40,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 19 states have internal predecessors, (94), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:07:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 412 transitions. [2022-07-21 17:07:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 17:07:40,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:07:40,544 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:07:40,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:07:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:07:40,760 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:07:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:07:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1112953710, now seen corresponding path program 1 times [2022-07-21 17:07:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:07:40,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305019716] [2022-07-21 17:07:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:07:40,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:07:40,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:07:40,763 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:07:40,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:07:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:07:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:07:41,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-21 17:07:41,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:07:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-21 17:07:41,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:41,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305019716] [2022-07-21 17:07:41,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305019716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:07:41,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:07:41,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2022-07-21 17:07:41,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057355535] [2022-07-21 17:07:41,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:07:41,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:07:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:07:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:07:41,670 INFO L87 Difference]: Start difference. First operand 313 states and 412 transitions. Second operand has 13 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 17:07:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:07:43,065 INFO L93 Difference]: Finished difference Result 340 states and 441 transitions. [2022-07-21 17:07:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:07:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2022-07-21 17:07:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:07:43,067 INFO L225 Difference]: With dead ends: 340 [2022-07-21 17:07:43,067 INFO L226 Difference]: Without dead ends: 340 [2022-07-21 17:07:43,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:07:43,068 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 51 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:07:43,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1562 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 734 Invalid, 0 Unknown, 56 Unchecked, 1.3s Time] [2022-07-21 17:07:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-21 17:07:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 325. [2022-07-21 17:07:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 208 states have (on average 1.3846153846153846) internal successors, (288), 244 states have internal predecessors, (288), 68 states have call successors, (68), 19 states have call predecessors, (68), 17 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 17:07:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 424 transitions. [2022-07-21 17:07:43,077 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 424 transitions. Word has length 86 [2022-07-21 17:07:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:07:43,077 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 424 transitions. [2022-07-21 17:07:43,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 17:07:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 424 transitions. [2022-07-21 17:07:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 17:07:43,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:07:43,078 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:07:43,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-21 17:07:43,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:07:43,298 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:07:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:07:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1112953709, now seen corresponding path program 1 times [2022-07-21 17:07:43,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:07:43,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127295106] [2022-07-21 17:07:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:07:43,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:07:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:07:43,300 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:07:43,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:07:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:07:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:07:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 17:07:44,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:07:45,696 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 24 treesize of output 20 [2022-07-21 17:07:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 17:07:45,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:45,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127295106] [2022-07-21 17:07:45,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127295106] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:07:45,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:07:45,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-21 17:07:45,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17920684] [2022-07-21 17:07:45,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:07:45,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:07:45,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:07:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:07:45,864 INFO L87 Difference]: Start difference. First operand 325 states and 424 transitions. Second operand has 25 states, 22 states have (on average 3.772727272727273) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 17:07:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:07:48,658 INFO L93 Difference]: Finished difference Result 330 states and 428 transitions. [2022-07-21 17:07:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:07:48,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.772727272727273) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 86 [2022-07-21 17:07:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:07:48,661 INFO L225 Difference]: With dead ends: 330 [2022-07-21 17:07:48,661 INFO L226 Difference]: Without dead ends: 330 [2022-07-21 17:07:48,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:07:48,662 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 47 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:07:48,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2320 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 738 Invalid, 0 Unknown, 53 Unchecked, 2.5s Time] [2022-07-21 17:07:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-21 17:07:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-07-21 17:07:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 212 states have (on average 1.3773584905660377) internal successors, (292), 248 states have internal predecessors, (292), 68 states have call successors, (68), 20 states have call predecessors, (68), 18 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 17:07:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 428 transitions. [2022-07-21 17:07:48,669 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 428 transitions. Word has length 86 [2022-07-21 17:07:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:07:48,670 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 428 transitions. [2022-07-21 17:07:48,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.772727272727273) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 17:07:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 428 transitions. [2022-07-21 17:07:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 17:07:48,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:07:48,671 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:07:48,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:07:48,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:07:48,888 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:07:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:07:48,889 INFO L85 PathProgramCache]: Analyzing trace with hash 194820021, now seen corresponding path program 2 times [2022-07-21 17:07:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:07:48,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235840636] [2022-07-21 17:07:48,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:07:48,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:07:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:07:48,890 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:07:48,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 17:07:49,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:07:49,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:07:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:07:49,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-07-21 17:07:49,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:07:49,799 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:07:49,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-21 17:07:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-21 17:07:49,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:49,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235840636] [2022-07-21 17:07:49,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235840636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:07:49,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:07:49,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2022-07-21 17:07:49,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708187674] [2022-07-21 17:07:49,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:07:49,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:07:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:07:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:07:49,811 INFO L87 Difference]: Start difference. First operand 330 states and 428 transitions. Second operand has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 17:07:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:07:50,573 INFO L93 Difference]: Finished difference Result 342 states and 438 transitions. [2022-07-21 17:07:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:07:50,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 92 [2022-07-21 17:07:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:07:50,575 INFO L225 Difference]: With dead ends: 342 [2022-07-21 17:07:50,575 INFO L226 Difference]: Without dead ends: 342 [2022-07-21 17:07:50,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 174 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:07:50,576 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 81 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:07:50,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 891 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 397 Invalid, 0 Unknown, 64 Unchecked, 0.7s Time] [2022-07-21 17:07:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-21 17:07:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 331. [2022-07-21 17:07:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 214 states have (on average 1.3691588785046729) internal successors, (293), 248 states have internal predecessors, (293), 68 states have call successors, (68), 21 states have call predecessors, (68), 18 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 17:07:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 429 transitions. [2022-07-21 17:07:50,585 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 429 transitions. Word has length 92 [2022-07-21 17:07:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:07:50,585 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 429 transitions. [2022-07-21 17:07:50,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 17:07:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 429 transitions. [2022-07-21 17:07:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 17:07:50,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:07:50,587 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:07:50,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:07:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:07:50,800 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:07:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:07:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash 194820022, now seen corresponding path program 2 times [2022-07-21 17:07:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:07:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133444592] [2022-07-21 17:07:50,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:07:50,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:07:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:07:50,803 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:07:50,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:07:51,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:07:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:07:51,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:07:51,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:07:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 7 proven. 143 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 17:07:52,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:07:52,591 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 8 treesize of output 6 [2022-07-21 17:07:52,820 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:07:52,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-07-21 17:07:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 5 proven. 143 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-21 17:07:53,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:07:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133444592] [2022-07-21 17:07:53,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133444592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:07:53,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:07:53,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2022-07-21 17:07:53,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796282274] [2022-07-21 17:07:53,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:07:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 17:07:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:07:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 17:07:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:07:53,523 INFO L87 Difference]: Start difference. First operand 331 states and 429 transitions. Second operand has 29 states, 24 states have (on average 4.0) internal successors, (96), 21 states have internal predecessors, (96), 9 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-21 17:08:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:01,295 INFO L93 Difference]: Finished difference Result 467 states and 609 transitions. [2022-07-21 17:08:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:08:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.0) internal successors, (96), 21 states have internal predecessors, (96), 9 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 92 [2022-07-21 17:08:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:01,299 INFO L225 Difference]: With dead ends: 467 [2022-07-21 17:08:01,299 INFO L226 Difference]: Without dead ends: 467 [2022-07-21 17:08:01,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 153 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 17:08:01,300 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 216 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 3976 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:01,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 3976 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1334 Invalid, 0 Unknown, 154 Unchecked, 5.9s Time] [2022-07-21 17:08:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-21 17:08:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 414. [2022-07-21 17:08:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 262 states have (on average 1.4351145038167938) internal successors, (376), 299 states have internal predecessors, (376), 101 states have call successors, (101), 23 states have call predecessors, (101), 20 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-21 17:08:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 578 transitions. [2022-07-21 17:08:01,313 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 578 transitions. Word has length 92 [2022-07-21 17:08:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:01,313 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 578 transitions. [2022-07-21 17:08:01,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.0) internal successors, (96), 21 states have internal predecessors, (96), 9 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-21 17:08:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 578 transitions. [2022-07-21 17:08:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 17:08:01,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:01,314 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:01,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-21 17:08:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:01,534 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting DUPFFexgcdErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1693134889, now seen corresponding path program 1 times [2022-07-21 17:08:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:01,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915112895] [2022-07-21 17:08:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:08:01,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:01,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:01,538 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:01,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 17:08:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:08:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 17:08:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:08:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-07-21 17:08:02,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:08:02,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:08:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915112895] [2022-07-21 17:08:02,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915112895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:08:02,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:08:02,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:08:02,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427120395] [2022-07-21 17:08:02,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:08:02,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:08:02,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:08:02,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:08:02,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:08:02,258 INFO L87 Difference]: Start difference. First operand 414 states and 578 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 17:08:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:02,270 INFO L93 Difference]: Finished difference Result 417 states and 578 transitions. [2022-07-21 17:08:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:08:02,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 91 [2022-07-21 17:08:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:02,273 INFO L225 Difference]: With dead ends: 417 [2022-07-21 17:08:02,273 INFO L226 Difference]: Without dead ends: 414 [2022-07-21 17:08:02,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:08:02,274 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:02,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 389 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:08:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-21 17:08:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-07-21 17:08:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 262 states have (on average 1.4236641221374047) internal successors, (373), 299 states have internal predecessors, (373), 101 states have call successors, (101), 23 states have call predecessors, (101), 20 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-21 17:08:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 575 transitions. [2022-07-21 17:08:02,288 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 575 transitions. Word has length 91 [2022-07-21 17:08:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:02,288 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 575 transitions. [2022-07-21 17:08:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 17:08:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 575 transitions. [2022-07-21 17:08:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 17:08:02,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:02,289 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:02,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:08:02,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:02,503 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash -947339606, now seen corresponding path program 1 times [2022-07-21 17:08:02,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:02,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479563106] [2022-07-21 17:08:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:08:02,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:02,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:02,507 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:02,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:08:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:08:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:08:03,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:08:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-21 17:08:03,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:08:03,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:08:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479563106] [2022-07-21 17:08:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479563106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:08:03,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:08:03,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:08:03,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6513310] [2022-07-21 17:08:03,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:08:03,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:08:03,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:08:03,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:08:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:08:03,826 INFO L87 Difference]: Start difference. First operand 414 states and 575 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 9 states have internal predecessors, (54), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 17:08:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:05,412 INFO L93 Difference]: Finished difference Result 414 states and 574 transitions. [2022-07-21 17:08:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:08:05,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 9 states have internal predecessors, (54), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2022-07-21 17:08:05,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:05,415 INFO L225 Difference]: With dead ends: 414 [2022-07-21 17:08:05,415 INFO L226 Difference]: Without dead ends: 414 [2022-07-21 17:08:05,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:08:05,416 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 34 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:05,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1537 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 514 Invalid, 0 Unknown, 52 Unchecked, 1.5s Time] [2022-07-21 17:08:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-21 17:08:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-07-21 17:08:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 262 states have (on average 1.4198473282442747) internal successors, (372), 299 states have internal predecessors, (372), 101 states have call successors, (101), 23 states have call predecessors, (101), 20 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-21 17:08:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 574 transitions. [2022-07-21 17:08:05,426 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 574 transitions. Word has length 92 [2022-07-21 17:08:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:05,427 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 574 transitions. [2022-07-21 17:08:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 9 states have internal predecessors, (54), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 17:08:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 574 transitions. [2022-07-21 17:08:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 17:08:05,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:05,428 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:05,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:08:05,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:05,646 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1134883697, now seen corresponding path program 3 times [2022-07-21 17:08:05,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:05,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500616950] [2022-07-21 17:08:05,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:08:05,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:05,648 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:05,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:08:06,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 17:08:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:08:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:08:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:08:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-07-21 17:08:06,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:08:06,821 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:08:06,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-21 17:08:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-07-21 17:08:06,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:08:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500616950] [2022-07-21 17:08:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500616950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:08:06,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:08:06,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 17:08:06,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152255461] [2022-07-21 17:08:06,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:08:06,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:08:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:08:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:08:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:08:06,840 INFO L87 Difference]: Start difference. First operand 414 states and 574 transitions. Second operand has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 17:08:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:08,056 INFO L93 Difference]: Finished difference Result 439 states and 599 transitions. [2022-07-21 17:08:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:08:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 101 [2022-07-21 17:08:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:08,058 INFO L225 Difference]: With dead ends: 439 [2022-07-21 17:08:08,058 INFO L226 Difference]: Without dead ends: 439 [2022-07-21 17:08:08,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:08:08,059 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 79 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:08,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 976 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 17:08:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-21 17:08:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 414. [2022-07-21 17:08:08,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 262 states have (on average 1.4198473282442747) internal successors, (372), 299 states have internal predecessors, (372), 101 states have call successors, (101), 23 states have call predecessors, (101), 20 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-21 17:08:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 574 transitions. [2022-07-21 17:08:08,071 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 574 transitions. Word has length 101 [2022-07-21 17:08:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:08,071 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 574 transitions. [2022-07-21 17:08:08,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 17:08:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 574 transitions. [2022-07-21 17:08:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 17:08:08,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:08,072 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:08,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-21 17:08:08,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:08,287 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1134883696, now seen corresponding path program 3 times [2022-07-21 17:08:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177943917] [2022-07-21 17:08:08,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:08:08,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:08,289 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:08,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 17:08:09,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 17:08:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:08:09,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:08:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:08:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 21 proven. 139 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-21 17:08:10,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:08:10,670 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 8 treesize of output 6 [2022-07-21 17:08:10,975 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:08:10,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-07-21 17:08:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 21 proven. 139 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-21 17:08:12,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:08:12,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177943917] [2022-07-21 17:08:12,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177943917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:08:12,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:08:12,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2022-07-21 17:08:12,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747885701] [2022-07-21 17:08:12,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:08:12,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 17:08:12,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:08:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 17:08:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:08:12,128 INFO L87 Difference]: Start difference. First operand 414 states and 574 transitions. Second operand has 32 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 22 states have internal predecessors, (96), 11 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-21 17:08:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:25,643 INFO L93 Difference]: Finished difference Result 581 states and 752 transitions. [2022-07-21 17:08:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:08:25,645 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 22 states have internal predecessors, (96), 11 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 101 [2022-07-21 17:08:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:25,646 INFO L225 Difference]: With dead ends: 581 [2022-07-21 17:08:25,647 INFO L226 Difference]: Without dead ends: 581 [2022-07-21 17:08:25,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=283, Invalid=2167, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 17:08:25,647 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 960 mSDsluCounter, 5928 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 6343 SdHoareTripleChecker+Invalid, 3632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:25,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 6343 Invalid, 3632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3095 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-07-21 17:08:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-07-21 17:08:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 501. [2022-07-21 17:08:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 314 states have (on average 1.4585987261146496) internal successors, (458), 354 states have internal predecessors, (458), 133 states have call successors, (133), 26 states have call predecessors, (133), 23 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2022-07-21 17:08:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 724 transitions. [2022-07-21 17:08:25,661 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 724 transitions. Word has length 101 [2022-07-21 17:08:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:25,661 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 724 transitions. [2022-07-21 17:08:25,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 22 states have internal predecessors, (96), 11 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-21 17:08:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 724 transitions. [2022-07-21 17:08:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 17:08:25,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:25,662 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:25,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:08:25,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:25,879 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting DUPFFexgcdErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash -485059473, now seen corresponding path program 1 times [2022-07-21 17:08:25,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:25,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278269506] [2022-07-21 17:08:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:08:25,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:25,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:25,885 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:25,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-21 17:08:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:08:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:08:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:08:27,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:08:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:08:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:08:27,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:08:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:08:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:08:27,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 38 [2022-07-21 17:08:27,821 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:08:27,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 18 [2022-07-21 17:08:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-21 17:08:27,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:08:27,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:08:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278269506] [2022-07-21 17:08:27,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278269506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:08:27,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:08:27,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 17:08:27,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405219633] [2022-07-21 17:08:27,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:08:27,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:08:27,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:08:27,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:08:27,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:08:27,908 INFO L87 Difference]: Start difference. First operand 501 states and 724 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 17:08:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:28,353 INFO L93 Difference]: Finished difference Result 433 states and 596 transitions. [2022-07-21 17:08:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:08:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 98 [2022-07-21 17:08:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:28,356 INFO L225 Difference]: With dead ends: 433 [2022-07-21 17:08:28,356 INFO L226 Difference]: Without dead ends: 417 [2022-07-21 17:08:28,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:08:28,357 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 13 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:28,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2046 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 177 Unchecked, 0.4s Time] [2022-07-21 17:08:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-21 17:08:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2022-07-21 17:08:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 262 states have (on average 1.4198473282442747) internal successors, (372), 299 states have internal predecessors, (372), 104 states have call successors, (104), 23 states have call predecessors, (104), 20 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2022-07-21 17:08:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 580 transitions. [2022-07-21 17:08:28,367 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 580 transitions. Word has length 98 [2022-07-21 17:08:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:28,368 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 580 transitions. [2022-07-21 17:08:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 17:08:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 580 transitions. [2022-07-21 17:08:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-21 17:08:28,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:28,369 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:28,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:08:28,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:28,583 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash 957572595, now seen corresponding path program 4 times [2022-07-21 17:08:28,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:28,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768700790] [2022-07-21 17:08:28,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:08:28,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:28,585 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:28,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 17:08:29,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:08:29,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:08:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 17:08:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:08:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-21 17:08:30,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:08:31,817 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 24 treesize of output 20 [2022-07-21 17:08:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-21 17:08:32,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:08:32,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768700790] [2022-07-21 17:08:32,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768700790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:08:32,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:08:32,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-21 17:08:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703947905] [2022-07-21 17:08:32,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:08:32,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:08:32,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:08:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:08:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:08:32,017 INFO L87 Difference]: Start difference. First operand 417 states and 580 transitions. Second operand has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 17 states have internal predecessors, (85), 7 states have call successors, (18), 8 states have call predecessors, (18), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 17:08:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:36,592 INFO L93 Difference]: Finished difference Result 434 states and 592 transitions. [2022-07-21 17:08:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:08:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 17 states have internal predecessors, (85), 7 states have call successors, (18), 8 states have call predecessors, (18), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 107 [2022-07-21 17:08:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:36,595 INFO L225 Difference]: With dead ends: 434 [2022-07-21 17:08:36,595 INFO L226 Difference]: Without dead ends: 434 [2022-07-21 17:08:36,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-07-21 17:08:36,596 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 77 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:36,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 2524 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1033 Invalid, 0 Unknown, 76 Unchecked, 4.1s Time] [2022-07-21 17:08:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-21 17:08:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 422. [2022-07-21 17:08:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 267 states have (on average 1.408239700374532) internal successors, (376), 305 states have internal predecessors, (376), 102 states have call successors, (102), 23 states have call predecessors, (102), 22 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2022-07-21 17:08:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 580 transitions. [2022-07-21 17:08:36,610 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 580 transitions. Word has length 107 [2022-07-21 17:08:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:36,610 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 580 transitions. [2022-07-21 17:08:36,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 17 states have internal predecessors, (85), 7 states have call successors, (18), 8 states have call predecessors, (18), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 17:08:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 580 transitions. [2022-07-21 17:08:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-21 17:08:36,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:36,611 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:36,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:08:36,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:36,829 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting DUPFFexgcdErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:36,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1221664532, now seen corresponding path program 1 times [2022-07-21 17:08:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:36,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635857861] [2022-07-21 17:08:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:08:36,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:36,831 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:36,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 17:08:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:08:37,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:08:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:08:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 131 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-21 17:08:38,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:08:39,898 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 8 treesize of output 6 [2022-07-21 17:08:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 131 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-21 17:08:40,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:08:40,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635857861] [2022-07-21 17:08:40,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635857861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:08:40,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:08:40,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-21 17:08:40,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255286997] [2022-07-21 17:08:40,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:08:40,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:08:40,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:08:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:08:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:08:40,002 INFO L87 Difference]: Start difference. First operand 422 states and 580 transitions. Second operand has 21 states, 20 states have (on average 4.55) internal successors, (91), 15 states have internal predecessors, (91), 7 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-21 17:08:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:08:44,181 INFO L93 Difference]: Finished difference Result 440 states and 593 transitions. [2022-07-21 17:08:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:08:44,182 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.55) internal successors, (91), 15 states have internal predecessors, (91), 7 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 113 [2022-07-21 17:08:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:08:44,184 INFO L225 Difference]: With dead ends: 440 [2022-07-21 17:08:44,184 INFO L226 Difference]: Without dead ends: 440 [2022-07-21 17:08:44,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 194 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:08:44,185 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 125 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:08:44,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1942 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1056 Invalid, 0 Unknown, 66 Unchecked, 3.9s Time] [2022-07-21 17:08:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-21 17:08:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 432. [2022-07-21 17:08:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 275 states have (on average 1.3890909090909092) internal successors, (382), 313 states have internal predecessors, (382), 102 states have call successors, (102), 25 states have call predecessors, (102), 24 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2022-07-21 17:08:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 586 transitions. [2022-07-21 17:08:44,195 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 586 transitions. Word has length 113 [2022-07-21 17:08:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:08:44,195 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 586 transitions. [2022-07-21 17:08:44,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.55) internal successors, (91), 15 states have internal predecessors, (91), 7 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-21 17:08:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 586 transitions. [2022-07-21 17:08:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-21 17:08:44,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:08:44,196 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:08:44,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-21 17:08:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:08:44,415 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting DUPFFexgcdErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-21 17:08:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:08:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 783105185, now seen corresponding path program 1 times [2022-07-21 17:08:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:08:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181661460] [2022-07-21 17:08:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:08:44,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:08:44,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:08:44,418 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:08:44,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process