./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/uthash-2.0.2/uthash_SAX_test10-1.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 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 13:15:55,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 13:15:55,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 13:15:55,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 13:15:55,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 13:15:55,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 13:15:55,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 13:15:55,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 13:15:55,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 13:15:55,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 13:15:55,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 13:15:55,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 13:15:55,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 13:15:55,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 13:15:55,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 13:15:55,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 13:15:55,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 13:15:55,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 13:15:55,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 13:15:55,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 13:15:55,901 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 13:15:55,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 13:15:55,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 13:15:55,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 13:15:55,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 13:15:55,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 13:15:55,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 13:15:55,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 13:15:55,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 13:15:55,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 13:15:55,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 13:15:55,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 13:15:55,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 13:15:55,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 13:15:55,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 13:15:55,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 13:15:55,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 13:15:55,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 13:15:55,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 13:15:55,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 13:15:55,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 13:15:55,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 13:15:55,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 13:15:55,946 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 13:15:55,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 13:15:55,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 13:15:55,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 13:15:55,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 13:15:55,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 13:15:55,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 13:15:55,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 13:15:55,949 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 13:15:55,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 13:15:55,949 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 13:15:55,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 13:15:55,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 13:15:55,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 13:15:55,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 13:15:55,950 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 13:15:55,950 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 13:15:55,950 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 13:15:55,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 13:15:55,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 13:15:55,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 13:15:55,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 13:15:55,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 13:15:55,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 13:15:55,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 13:15:55,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 13:15:55,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 13:15:55,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 13:15:55,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 13:15:55,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 13:15:55,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 [2022-07-20 13:15:56,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 13:15:56,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 13:15:56,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 13:15:56,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 13:15:56,132 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 13:15:56,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2022-07-20 13:15:56,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40606b197/3f0f52b799ab406cbae936633c5b6065/FLAG5d0295af2 [2022-07-20 13:15:56,668 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 13:15:56,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2022-07-20 13:15:56,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40606b197/3f0f52b799ab406cbae936633c5b6065/FLAG5d0295af2 [2022-07-20 13:15:56,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40606b197/3f0f52b799ab406cbae936633c5b6065 [2022-07-20 13:15:56,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 13:15:56,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 13:15:56,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 13:15:56,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 13:15:56,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 13:15:56,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:15:56" (1/1) ... [2022-07-20 13:15:56,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17de9beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:15:56, skipping insertion in model container [2022-07-20 13:15:56,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:15:56" (1/1) ... [2022-07-20 13:15:56,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 13:15:57,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 13:15:57,327 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i[33022,33035] [2022-07-20 13:15:57,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:15:57,517 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) [2022-07-20 13:15:57,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4eb8b8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:15:57, skipping insertion in model container [2022-07-20 13:15:57,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 13:15:57,518 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-20 13:15:57,520 INFO L158 Benchmark]: Toolchain (without parser) took 554.86ms. Allocated memory is still 90.2MB. Free memory was 52.7MB in the beginning and 47.6MB in the end (delta: 5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 13:15:57,521 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 90.2MB. Free memory was 61.8MB in the beginning and 61.8MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 13:15:57,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 538.88ms. Allocated memory is still 90.2MB. Free memory was 52.5MB in the beginning and 48.0MB in the end (delta: 4.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 13:15:57,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 90.2MB. Free memory was 61.8MB in the beginning and 61.8MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 538.88ms. Allocated memory is still 90.2MB. Free memory was 52.5MB in the beginning and 48.0MB in the end (delta: 4.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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/uthash-2.0.2/uthash_SAX_test10-1.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 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 13:15:58,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 13:15:58,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 13:15:58,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 13:15:58,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 13:15:58,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 13:15:58,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 13:15:59,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 13:15:59,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 13:15:59,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 13:15:59,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 13:15:59,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 13:15:59,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 13:15:59,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 13:15:59,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 13:15:59,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 13:15:59,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 13:15:59,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 13:15:59,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 13:15:59,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 13:15:59,021 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 13:15:59,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 13:15:59,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 13:15:59,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 13:15:59,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 13:15:59,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 13:15:59,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 13:15:59,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 13:15:59,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 13:15:59,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 13:15:59,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 13:15:59,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 13:15:59,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 13:15:59,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 13:15:59,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 13:15:59,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 13:15:59,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 13:15:59,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 13:15:59,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 13:15:59,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 13:15:59,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 13:15:59,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 13:15:59,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 13:15:59,076 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 13:15:59,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 13:15:59,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 13:15:59,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 13:15:59,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 13:15:59,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 13:15:59,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 13:15:59,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 13:15:59,079 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 13:15:59,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 13:15:59,080 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 13:15:59,080 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 13:15:59,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 13:15:59,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 13:15:59,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 13:15:59,081 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 13:15:59,081 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 13:15:59,081 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 13:15:59,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 13:15:59,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 13:15:59,081 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 13:15:59,082 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 13:15:59,082 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 13:15:59,082 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 13:15:59,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 13:15:59,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 13:15:59,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 13:15:59,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 13:15:59,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 13:15:59,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 13:15:59,083 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 13:15:59,083 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 13:15:59,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 13:15:59,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 [2022-07-20 13:15:59,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 13:15:59,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 13:15:59,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 13:15:59,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 13:15:59,368 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 13:15:59,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2022-07-20 13:15:59,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaa42bea/de55bc39ff6041e7a0a72a398d0cb3b5/FLAG06d880ecd [2022-07-20 13:15:59,870 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 13:15:59,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2022-07-20 13:15:59,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaa42bea/de55bc39ff6041e7a0a72a398d0cb3b5/FLAG06d880ecd [2022-07-20 13:16:00,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaa42bea/de55bc39ff6041e7a0a72a398d0cb3b5 [2022-07-20 13:16:00,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 13:16:00,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 13:16:00,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 13:16:00,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 13:16:00,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 13:16:00,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:00,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e816075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00, skipping insertion in model container [2022-07-20 13:16:00,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:00,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 13:16:00,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 13:16:00,526 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i[33022,33035] [2022-07-20 13:16:00,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:16:00,726 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-20 13:16:00,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 13:16:00,743 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i[33022,33035] [2022-07-20 13:16:00,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:16:00,840 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 13:16:00,862 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i[33022,33035] [2022-07-20 13:16:00,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:16:00,936 INFO L208 MainTranslator]: Completed translation [2022-07-20 13:16:00,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00 WrapperNode [2022-07-20 13:16:00,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 13:16:00,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 13:16:00,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 13:16:00,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 13:16:00,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:00,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,062 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2022-07-20 13:16:01,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 13:16:01,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 13:16:01,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 13:16:01,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 13:16:01,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 13:16:01,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 13:16:01,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 13:16:01,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 13:16:01,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (1/1) ... [2022-07-20 13:16:01,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 13:16:01,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 13:16:01,219 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) [2022-07-20 13:16:01,226 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 [2022-07-20 13:16:01,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-20 13:16:01,247 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-20 13:16:01,247 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-20 13:16:01,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 13:16:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 13:16:01,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 13:16:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-20 13:16:01,248 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-20 13:16:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 13:16:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 13:16:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 13:16:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 13:16:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-20 13:16:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 13:16:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 13:16:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 13:16:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 13:16:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 13:16:01,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 13:16:01,506 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 13:16:01,507 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 13:16:01,510 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 13:16:07,267 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 13:16:07,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 13:16:07,287 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2022-07-20 13:16:07,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:16:07 BoogieIcfgContainer [2022-07-20 13:16:07,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 13:16:07,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 13:16:07,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 13:16:07,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 13:16:07,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:16:00" (1/3) ... [2022-07-20 13:16:07,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f2594c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:16:07, skipping insertion in model container [2022-07-20 13:16:07,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:00" (2/3) ... [2022-07-20 13:16:07,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f2594c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:16:07, skipping insertion in model container [2022-07-20 13:16:07,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:16:07" (3/3) ... [2022-07-20 13:16:07,298 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-1.i [2022-07-20 13:16:07,308 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 13:16:07,309 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2022-07-20 13:16:07,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 13:16:07,364 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@513004bd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b3e20f1 [2022-07-20 13:16:07,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2022-07-20 13:16:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 13:16:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-20 13:16:07,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:07,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-20 13:16:07,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-07-20 13:16:07,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:07,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341300412] [2022-07-20 13:16:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:07,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:07,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:07,390 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) [2022-07-20 13:16:07,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 13:16:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:07,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:07,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:07,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:07,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:07,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341300412] [2022-07-20 13:16:07,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341300412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:07,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:07,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:07,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895310821] [2022-07-20 13:16:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:07,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:07,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:07,681 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:10,176 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2022-07-20 13:16:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-20 13:16:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:10,195 INFO L225 Difference]: With dead ends: 2558 [2022-07-20 13:16:10,195 INFO L226 Difference]: Without dead ends: 2556 [2022-07-20 13:16:10,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:10,198 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:10,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 13:16:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-07-20 13:16:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2022-07-20 13:16:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 13:16:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2022-07-20 13:16:10,287 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2022-07-20 13:16:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:10,287 INFO L495 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2022-07-20 13:16:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2022-07-20 13:16:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-20 13:16:10,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:10,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-20 13:16:10,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:10,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:10,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-07-20 13:16:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:10,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823513951] [2022-07-20 13:16:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:10,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:10,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:10,499 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) [2022-07-20 13:16:10,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 13:16:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:10,642 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 [2022-07-20 13:16:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:10,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:10,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823513951] [2022-07-20 13:16:10,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823513951] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:10,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:10,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884127747] [2022-07-20 13:16:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:10,661 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:14,032 INFO L93 Difference]: Finished difference Result 2973 states and 3378 transitions. [2022-07-20 13:16:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-20 13:16:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:14,040 INFO L225 Difference]: With dead ends: 2973 [2022-07-20 13:16:14,040 INFO L226 Difference]: Without dead ends: 2973 [2022-07-20 13:16:14,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:14,041 INFO L413 NwaCegarLoop]: 1837 mSDtfsCounter, 844 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:14,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 3017 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-20 13:16:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-07-20 13:16:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2651. [2022-07-20 13:16:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1671 states have (on average 1.9970077797725914) internal successors, (3337), 2632 states have internal predecessors, (3337), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 13:16:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3375 transitions. [2022-07-20 13:16:14,089 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3375 transitions. Word has length 3 [2022-07-20 13:16:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:14,089 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 3375 transitions. [2022-07-20 13:16:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3375 transitions. [2022-07-20 13:16:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 13:16:14,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:14,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:14,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:14,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:14,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-07-20 13:16:14,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898171572] [2022-07-20 13:16:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:14,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:14,308 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) [2022-07-20 13:16:14,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 13:16:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 13:16:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:14,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:14,483 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 [2022-07-20 13:16:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 13:16:14,533 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 [2022-07-20 13:16:14,541 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 13:16:14,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 13:16:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:14,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:14,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898171572] [2022-07-20 13:16:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898171572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:14,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:14,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845774076] [2022-07-20 13:16:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:14,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:14,562 INFO L87 Difference]: Start difference. First operand 2651 states and 3375 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:20,319 INFO L93 Difference]: Finished difference Result 4906 states and 5782 transitions. [2022-07-20 13:16:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 13:16:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:20,332 INFO L225 Difference]: With dead ends: 4906 [2022-07-20 13:16:20,332 INFO L226 Difference]: Without dead ends: 4906 [2022-07-20 13:16:20,333 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 [2022-07-20 13:16:20,333 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 4307 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4317 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:20,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4317 Valid, 2067 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-20 13:16:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2022-07-20 13:16:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3370. [2022-07-20 13:16:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 2390 states have (on average 2.0351464435146442) internal successors, (4864), 3345 states have internal predecessors, (4864), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4914 transitions. [2022-07-20 13:16:20,388 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4914 transitions. Word has length 7 [2022-07-20 13:16:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:20,389 INFO L495 AbstractCegarLoop]: Abstraction has 3370 states and 4914 transitions. [2022-07-20 13:16:20,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4914 transitions. [2022-07-20 13:16:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 13:16:20,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:20,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:20,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-20 13:16:20,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:20,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-07-20 13:16:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:20,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375033424] [2022-07-20 13:16:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:20,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:20,602 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) [2022-07-20 13:16:20,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 13:16:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:20,759 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 [2022-07-20 13:16:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:20,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:20,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375033424] [2022-07-20 13:16:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375033424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:20,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212355055] [2022-07-20 13:16:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:20,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:20,774 INFO L87 Difference]: Start difference. First operand 3370 states and 4914 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:23,002 INFO L93 Difference]: Finished difference Result 4574 states and 6431 transitions. [2022-07-20 13:16:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 13:16:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:23,014 INFO L225 Difference]: With dead ends: 4574 [2022-07-20 13:16:23,014 INFO L226 Difference]: Without dead ends: 4574 [2022-07-20 13:16:23,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:23,015 INFO L413 NwaCegarLoop]: 1967 mSDtfsCounter, 1998 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:23,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 2622 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 13:16:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2022-07-20 13:16:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3279. [2022-07-20 13:16:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 2390 states have (on average 1.9460251046025105) internal successors, (4651), 3254 states have internal predecessors, (4651), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4701 transitions. [2022-07-20 13:16:23,067 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4701 transitions. Word has length 8 [2022-07-20 13:16:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:23,067 INFO L495 AbstractCegarLoop]: Abstraction has 3279 states and 4701 transitions. [2022-07-20 13:16:23,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4701 transitions. [2022-07-20 13:16:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 13:16:23,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:23,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:23,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:23,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:23,274 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:23,275 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-07-20 13:16:23,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:23,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178686390] [2022-07-20 13:16:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:23,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:23,277 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) [2022-07-20 13:16:23,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 13:16:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:23,427 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 [2022-07-20 13:16:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:23,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:23,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178686390] [2022-07-20 13:16:23,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178686390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:23,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:23,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:23,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347747351] [2022-07-20 13:16:23,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:23,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:23,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:23,448 INFO L87 Difference]: Start difference. First operand 3279 states and 4701 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:26,700 INFO L93 Difference]: Finished difference Result 4996 states and 7060 transitions. [2022-07-20 13:16:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:26,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 13:16:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:26,712 INFO L225 Difference]: With dead ends: 4996 [2022-07-20 13:16:26,713 INFO L226 Difference]: Without dead ends: 4996 [2022-07-20 13:16:26,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:26,713 INFO L413 NwaCegarLoop]: 2347 mSDtfsCounter, 1371 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:26,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 3335 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 13:16:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2022-07-20 13:16:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3601. [2022-07-20 13:16:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 2722 states have (on average 1.9335047759000734) internal successors, (5263), 3576 states have internal predecessors, (5263), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5313 transitions. [2022-07-20 13:16:26,783 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5313 transitions. Word has length 8 [2022-07-20 13:16:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:26,784 INFO L495 AbstractCegarLoop]: Abstraction has 3601 states and 5313 transitions. [2022-07-20 13:16:26,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5313 transitions. [2022-07-20 13:16:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 13:16:26,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:26,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:26,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-20 13:16:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:26,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-07-20 13:16:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:26,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296146649] [2022-07-20 13:16:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:26,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:26,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:26,993 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) [2022-07-20 13:16:26,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 13:16:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 13:16:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:27,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:27,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:27,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296146649] [2022-07-20 13:16:27,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296146649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:27,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:27,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563246610] [2022-07-20 13:16:27,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:27,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:27,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:27,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:27,150 INFO L87 Difference]: Start difference. First operand 3601 states and 5313 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:27,182 INFO L93 Difference]: Finished difference Result 3541 states and 5227 transitions. [2022-07-20 13:16:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 13:16:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:27,198 INFO L225 Difference]: With dead ends: 3541 [2022-07-20 13:16:27,198 INFO L226 Difference]: Without dead ends: 3541 [2022-07-20 13:16:27,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:27,200 INFO L413 NwaCegarLoop]: 2011 mSDtfsCounter, 801 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 3227 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:27,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 3227 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2022-07-20 13:16:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3541. [2022-07-20 13:16:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2686 states have (on average 1.9274013402829486) internal successors, (5177), 3516 states have internal predecessors, (5177), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5227 transitions. [2022-07-20 13:16:27,248 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5227 transitions. Word has length 11 [2022-07-20 13:16:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:27,248 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5227 transitions. [2022-07-20 13:16:27,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5227 transitions. [2022-07-20 13:16:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 13:16:27,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:27,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:27,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:27,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:27,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-07-20 13:16:27,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:27,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614788459] [2022-07-20 13:16:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:27,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:27,460 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) [2022-07-20 13:16:27,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 13:16:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:27,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:27,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:27,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:27,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614788459] [2022-07-20 13:16:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614788459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:27,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525814599] [2022-07-20 13:16:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:27,605 INFO L87 Difference]: Start difference. First operand 3541 states and 5227 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:27,673 INFO L93 Difference]: Finished difference Result 3513 states and 5171 transitions. [2022-07-20 13:16:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:27,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 13:16:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:27,696 INFO L225 Difference]: With dead ends: 3513 [2022-07-20 13:16:27,697 INFO L226 Difference]: Without dead ends: 3513 [2022-07-20 13:16:27,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:27,698 INFO L413 NwaCegarLoop]: 1966 mSDtfsCounter, 772 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 5141 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:27,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 5141 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-07-20 13:16:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2022-07-20 13:16:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2670 states have (on average 1.9172284644194757) internal successors, (5119), 3486 states have internal predecessors, (5119), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5169 transitions. [2022-07-20 13:16:27,736 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5169 transitions. Word has length 13 [2022-07-20 13:16:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:27,737 INFO L495 AbstractCegarLoop]: Abstraction has 3511 states and 5169 transitions. [2022-07-20 13:16:27,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5169 transitions. [2022-07-20 13:16:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 13:16:27,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:27,738 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] [2022-07-20 13:16:27,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:27,946 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:27,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:27,946 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-07-20 13:16:27,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:27,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085325478] [2022-07-20 13:16:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:27,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:27,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:27,948 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) [2022-07-20 13:16:27,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 13:16:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 13:16:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:28,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:28,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:28,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085325478] [2022-07-20 13:16:28,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085325478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:28,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:28,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:28,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562453542] [2022-07-20 13:16:28,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:28,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:28,135 INFO L87 Difference]: Start difference. First operand 3511 states and 5169 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:28,166 INFO L93 Difference]: Finished difference Result 4760 states and 6526 transitions. [2022-07-20 13:16:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:28,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 13:16:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:28,176 INFO L225 Difference]: With dead ends: 4760 [2022-07-20 13:16:28,176 INFO L226 Difference]: Without dead ends: 4760 [2022-07-20 13:16:28,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:28,177 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 1892 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 4705 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:28,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 4705 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-07-20 13:16:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3451. [2022-07-20 13:16:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2634 states have (on average 1.910782080485953) internal successors, (5033), 3426 states have internal predecessors, (5033), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 5083 transitions. [2022-07-20 13:16:28,222 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 5083 transitions. Word has length 20 [2022-07-20 13:16:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:28,222 INFO L495 AbstractCegarLoop]: Abstraction has 3451 states and 5083 transitions. [2022-07-20 13:16:28,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 5083 transitions. [2022-07-20 13:16:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 13:16:28,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:28,223 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] [2022-07-20 13:16:28,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:28,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:28,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-07-20 13:16:28,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:28,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126941642] [2022-07-20 13:16:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:28,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:28,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:28,434 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) [2022-07-20 13:16:28,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 13:16:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 13:16:28,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:28,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:28,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:28,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126941642] [2022-07-20 13:16:28,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126941642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:28,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:28,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486299237] [2022-07-20 13:16:28,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:28,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:28,609 INFO L87 Difference]: Start difference. First operand 3451 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:28,640 INFO L93 Difference]: Finished difference Result 4593 states and 6235 transitions. [2022-07-20 13:16:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 13:16:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:28,648 INFO L225 Difference]: With dead ends: 4593 [2022-07-20 13:16:28,649 INFO L226 Difference]: Without dead ends: 4593 [2022-07-20 13:16:28,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:28,651 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 1849 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 4566 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:28,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1859 Valid, 4566 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2022-07-20 13:16:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3319. [2022-07-20 13:16:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2526 states have (on average 1.8903404592240696) internal successors, (4775), 3294 states have internal predecessors, (4775), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4825 transitions. [2022-07-20 13:16:28,695 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4825 transitions. Word has length 20 [2022-07-20 13:16:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:28,695 INFO L495 AbstractCegarLoop]: Abstraction has 3319 states and 4825 transitions. [2022-07-20 13:16:28,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4825 transitions. [2022-07-20 13:16:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 13:16:28,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:28,698 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] [2022-07-20 13:16:28,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:28,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:28,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-07-20 13:16:28,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:28,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808824548] [2022-07-20 13:16:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:28,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:28,909 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) [2022-07-20 13:16:28,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 13:16:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:29,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:29,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:29,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:29,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808824548] [2022-07-20 13:16:29,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808824548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:29,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:29,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:29,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385942] [2022-07-20 13:16:29,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:29,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:29,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:29,080 INFO L87 Difference]: Start difference. First operand 3319 states and 4825 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:29,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:29,154 INFO L93 Difference]: Finished difference Result 4558 states and 6169 transitions. [2022-07-20 13:16:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:29,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 13:16:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:29,175 INFO L225 Difference]: With dead ends: 4558 [2022-07-20 13:16:29,175 INFO L226 Difference]: Without dead ends: 4558 [2022-07-20 13:16:29,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:29,176 INFO L413 NwaCegarLoop]: 3168 mSDtfsCounter, 1820 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 7692 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:29,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1830 Valid, 7692 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2022-07-20 13:16:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3289. [2022-07-20 13:16:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2510 states have (on average 1.8792828685258964) internal successors, (4717), 3264 states have internal predecessors, (4717), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4767 transitions. [2022-07-20 13:16:29,215 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4767 transitions. Word has length 22 [2022-07-20 13:16:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:29,215 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4767 transitions. [2022-07-20 13:16:29,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4767 transitions. [2022-07-20 13:16:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 13:16:29,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:29,218 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] [2022-07-20 13:16:29,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:29,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:29,426 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-07-20 13:16:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:29,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791246751] [2022-07-20 13:16:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:29,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:29,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:29,429 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) [2022-07-20 13:16:29,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 13:16:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:29,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:29,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:29,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791246751] [2022-07-20 13:16:29,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791246751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:29,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:29,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735607387] [2022-07-20 13:16:29,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:29,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:29,612 INFO L87 Difference]: Start difference. First operand 3289 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:29,676 INFO L93 Difference]: Finished difference Result 4485 states and 5980 transitions. [2022-07-20 13:16:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 13:16:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:29,683 INFO L225 Difference]: With dead ends: 4485 [2022-07-20 13:16:29,684 INFO L226 Difference]: Without dead ends: 4485 [2022-07-20 13:16:29,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:29,684 INFO L413 NwaCegarLoop]: 3093 mSDtfsCounter, 1785 mSDsluCounter, 4409 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 7502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:29,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 7502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2022-07-20 13:16:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3227. [2022-07-20 13:16:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 2462 states have (on average 1.8452477660438669) internal successors, (4543), 3202 states have internal predecessors, (4543), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4593 transitions. [2022-07-20 13:16:29,765 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4593 transitions. Word has length 22 [2022-07-20 13:16:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:29,765 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 4593 transitions. [2022-07-20 13:16:29,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4593 transitions. [2022-07-20 13:16:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 13:16:29,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:29,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:29,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:29,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:29,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-07-20 13:16:29,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617600257] [2022-07-20 13:16:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:29,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:29,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:29,968 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) [2022-07-20 13:16:29,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 13:16:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:30,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:30,129 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 [2022-07-20 13:16:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:30,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:30,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617600257] [2022-07-20 13:16:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617600257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:30,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:30,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:30,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867408109] [2022-07-20 13:16:30,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:30,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:30,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:30,180 INFO L87 Difference]: Start difference. First operand 3227 states and 4593 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:32,305 INFO L93 Difference]: Finished difference Result 3502 states and 4766 transitions. [2022-07-20 13:16:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:32,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 13:16:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:32,311 INFO L225 Difference]: With dead ends: 3502 [2022-07-20 13:16:32,311 INFO L226 Difference]: Without dead ends: 3502 [2022-07-20 13:16:32,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:32,311 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 2363 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:32,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2369 Valid, 2017 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 13:16:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-07-20 13:16:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3223. [2022-07-20 13:16:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2462 states have (on average 1.8419983753046303) internal successors, (4535), 3198 states have internal predecessors, (4535), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4585 transitions. [2022-07-20 13:16:32,342 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4585 transitions. Word has length 27 [2022-07-20 13:16:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:32,342 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 4585 transitions. [2022-07-20 13:16:32,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4585 transitions. [2022-07-20 13:16:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 13:16:32,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:32,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:32,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-20 13:16:32,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:32,550 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:32,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-07-20 13:16:32,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:32,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366797183] [2022-07-20 13:16:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:32,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:32,552 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) [2022-07-20 13:16:32,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 13:16:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:32,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 13:16:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:32,723 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 [2022-07-20 13:16:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:32,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:32,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:32,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366797183] [2022-07-20 13:16:32,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366797183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:32,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:32,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:32,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076271082] [2022-07-20 13:16:32,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:32,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:32,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:32,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:32,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:32,827 INFO L87 Difference]: Start difference. First operand 3223 states and 4585 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:36,260 INFO L93 Difference]: Finished difference Result 3925 states and 5359 transitions. [2022-07-20 13:16:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 13:16:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 13:16:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:36,266 INFO L225 Difference]: With dead ends: 3925 [2022-07-20 13:16:36,266 INFO L226 Difference]: Without dead ends: 3925 [2022-07-20 13:16:36,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:36,267 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1487 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:36,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 3475 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-20 13:16:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2022-07-20 13:16:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3259. [2022-07-20 13:16:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2498 states have (on average 1.831865492393915) internal successors, (4576), 3234 states have internal predecessors, (4576), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4626 transitions. [2022-07-20 13:16:36,301 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4626 transitions. Word has length 27 [2022-07-20 13:16:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:36,301 INFO L495 AbstractCegarLoop]: Abstraction has 3259 states and 4626 transitions. [2022-07-20 13:16:36,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4626 transitions. [2022-07-20 13:16:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:16:36,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:36,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:36,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-20 13:16:36,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:36,510 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-07-20 13:16:36,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:36,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177289845] [2022-07-20 13:16:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:36,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:36,512 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) [2022-07-20 13:16:36,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 13:16:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:36,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:36,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:36,683 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 [2022-07-20 13:16:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:36,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:36,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:36,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177289845] [2022-07-20 13:16:36,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177289845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:36,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:36,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677041611] [2022-07-20 13:16:36,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:36,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:36,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:36,727 INFO L87 Difference]: Start difference. First operand 3259 states and 4626 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:40,182 INFO L93 Difference]: Finished difference Result 6304 states and 8790 transitions. [2022-07-20 13:16:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:40,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:16:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:40,191 INFO L225 Difference]: With dead ends: 6304 [2022-07-20 13:16:40,192 INFO L226 Difference]: Without dead ends: 6304 [2022-07-20 13:16:40,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:40,192 INFO L413 NwaCegarLoop]: 2393 mSDtfsCounter, 3502 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:40,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 4226 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-20 13:16:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2022-07-20 13:16:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3255. [2022-07-20 13:16:40,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2498 states have (on average 1.8286629303442754) internal successors, (4568), 3230 states have internal predecessors, (4568), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4618 transitions. [2022-07-20 13:16:40,235 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4618 transitions. Word has length 36 [2022-07-20 13:16:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:40,235 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 4618 transitions. [2022-07-20 13:16:40,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4618 transitions. [2022-07-20 13:16:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:16:40,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:40,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:40,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-20 13:16:40,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:40,445 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-07-20 13:16:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:40,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106548227] [2022-07-20 13:16:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:40,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:40,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:40,448 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) [2022-07-20 13:16:40,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 13:16:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:40,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 13:16:40,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:40,640 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 [2022-07-20 13:16:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:40,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:40,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:40,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106548227] [2022-07-20 13:16:40,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106548227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:40,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:40,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:40,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935586845] [2022-07-20 13:16:40,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:40,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:40,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:40,740 INFO L87 Difference]: Start difference. First operand 3255 states and 4618 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:45,430 INFO L93 Difference]: Finished difference Result 5973 states and 8166 transitions. [2022-07-20 13:16:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:16:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:45,436 INFO L225 Difference]: With dead ends: 5973 [2022-07-20 13:16:45,436 INFO L226 Difference]: Without dead ends: 5973 [2022-07-20 13:16:45,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:45,437 INFO L413 NwaCegarLoop]: 2332 mSDtfsCounter, 2860 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 4625 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:45,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2864 Valid, 4625 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-20 13:16:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2022-07-20 13:16:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 3251. [2022-07-20 13:16:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2498 states have (on average 1.8254603682946358) internal successors, (4560), 3226 states have internal predecessors, (4560), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4610 transitions. [2022-07-20 13:16:45,504 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4610 transitions. Word has length 36 [2022-07-20 13:16:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:45,505 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 4610 transitions. [2022-07-20 13:16:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4610 transitions. [2022-07-20 13:16:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:16:45,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:45,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:45,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:45,714 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-07-20 13:16:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523500913] [2022-07-20 13:16:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:45,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:45,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:45,717 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) [2022-07-20 13:16:45,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 13:16:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:45,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:45,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:45,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:45,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:45,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:45,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523500913] [2022-07-20 13:16:45,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523500913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:45,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:45,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:45,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186107438] [2022-07-20 13:16:45,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:45,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:45,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:45,931 INFO L87 Difference]: Start difference. First operand 3251 states and 4610 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:49,622 INFO L93 Difference]: Finished difference Result 6748 states and 9302 transitions. [2022-07-20 13:16:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 13:16:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:16:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:49,629 INFO L225 Difference]: With dead ends: 6748 [2022-07-20 13:16:49,630 INFO L226 Difference]: Without dead ends: 6748 [2022-07-20 13:16:49,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:49,630 INFO L413 NwaCegarLoop]: 1965 mSDtfsCounter, 4494 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:49,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4504 Valid, 3990 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-20 13:16:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2022-07-20 13:16:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 3248. [2022-07-20 13:16:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8166533226581265) internal successors, (4538), 3223 states have internal predecessors, (4538), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4588 transitions. [2022-07-20 13:16:49,680 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4588 transitions. Word has length 36 [2022-07-20 13:16:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:49,680 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4588 transitions. [2022-07-20 13:16:49,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4588 transitions. [2022-07-20 13:16:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:16:49,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:49,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:49,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:49,891 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-07-20 13:16:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:49,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809860377] [2022-07-20 13:16:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:49,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:49,893 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) [2022-07-20 13:16:49,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 13:16:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 13:16:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:50,063 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 [2022-07-20 13:16:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:50,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:50,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809860377] [2022-07-20 13:16:50,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809860377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:50,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:50,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:50,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502197658] [2022-07-20 13:16:50,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:50,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:50,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:50,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:50,171 INFO L87 Difference]: Start difference. First operand 3248 states and 4588 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:54,117 INFO L93 Difference]: Finished difference Result 4807 states and 6551 transitions. [2022-07-20 13:16:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:16:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:54,123 INFO L225 Difference]: With dead ends: 4807 [2022-07-20 13:16:54,123 INFO L226 Difference]: Without dead ends: 4807 [2022-07-20 13:16:54,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:54,123 INFO L413 NwaCegarLoop]: 2238 mSDtfsCounter, 2208 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:54,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2208 Valid, 4103 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-20 13:16:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-07-20 13:16:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3248. [2022-07-20 13:16:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8134507606084869) internal successors, (4530), 3223 states have internal predecessors, (4530), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4580 transitions. [2022-07-20 13:16:54,166 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4580 transitions. Word has length 36 [2022-07-20 13:16:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:54,166 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4580 transitions. [2022-07-20 13:16:54,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4580 transitions. [2022-07-20 13:16:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 13:16:54,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:54,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:54,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:54,375 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-07-20 13:16:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:54,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674313633] [2022-07-20 13:16:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:54,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:54,378 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) [2022-07-20 13:16:54,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 13:16:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:54,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:54,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674313633] [2022-07-20 13:16:54,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674313633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:54,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:54,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:54,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065690373] [2022-07-20 13:16:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:54,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:54,570 INFO L87 Difference]: Start difference. First operand 3248 states and 4580 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:54,612 INFO L93 Difference]: Finished difference Result 3236 states and 4556 transitions. [2022-07-20 13:16:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 13:16:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:54,615 INFO L225 Difference]: With dead ends: 3236 [2022-07-20 13:16:54,615 INFO L226 Difference]: Without dead ends: 3236 [2022-07-20 13:16:54,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:54,615 INFO L413 NwaCegarLoop]: 1797 mSDtfsCounter, 756 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 4622 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:54,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 4622 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2022-07-20 13:16:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3236. [2022-07-20 13:16:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 2486 states have (on average 1.8125502815768302) internal successors, (4506), 3211 states have internal predecessors, (4506), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 4556 transitions. [2022-07-20 13:16:54,645 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 4556 transitions. Word has length 40 [2022-07-20 13:16:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:54,645 INFO L495 AbstractCegarLoop]: Abstraction has 3236 states and 4556 transitions. [2022-07-20 13:16:54,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 4556 transitions. [2022-07-20 13:16:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 13:16:54,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:54,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:54,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:54,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:54,853 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:54,854 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-07-20 13:16:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:54,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517147489] [2022-07-20 13:16:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:54,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:54,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:54,856 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) [2022-07-20 13:16:54,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 13:16:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:55,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:55,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517147489] [2022-07-20 13:16:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517147489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:55,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:55,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660866527] [2022-07-20 13:16:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:55,135 INFO L87 Difference]: Start difference. First operand 3236 states and 4556 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:55,243 INFO L93 Difference]: Finished difference Result 4684 states and 6375 transitions. [2022-07-20 13:16:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-20 13:16:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:55,248 INFO L225 Difference]: With dead ends: 4684 [2022-07-20 13:16:55,248 INFO L226 Difference]: Without dead ends: 4684 [2022-07-20 13:16:55,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:55,248 INFO L413 NwaCegarLoop]: 1820 mSDtfsCounter, 1180 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:55,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 3502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 13:16:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-07-20 13:16:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4020. [2022-07-20 13:16:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 3266 states have (on average 1.7988364972443356) internal successors, (5875), 3988 states have internal predecessors, (5875), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-20 13:16:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5939 transitions. [2022-07-20 13:16:55,300 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5939 transitions. Word has length 48 [2022-07-20 13:16:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:55,301 INFO L495 AbstractCegarLoop]: Abstraction has 4020 states and 5939 transitions. [2022-07-20 13:16:55,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5939 transitions. [2022-07-20 13:16:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 13:16:55,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:55,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:55,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-20 13:16:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:55,510 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-07-20 13:16:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:55,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501184137] [2022-07-20 13:16:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:55,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:55,512 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:55,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 13:16:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:55,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:55,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:55,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501184137] [2022-07-20 13:16:55,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501184137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:55,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:55,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:55,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462606457] [2022-07-20 13:16:55,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:55,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:55,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:55,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:55,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:55,738 INFO L87 Difference]: Start difference. First operand 4020 states and 5939 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:55,836 INFO L93 Difference]: Finished difference Result 4959 states and 6922 transitions. [2022-07-20 13:16:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:55,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-20 13:16:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:55,841 INFO L225 Difference]: With dead ends: 4959 [2022-07-20 13:16:55,842 INFO L226 Difference]: Without dead ends: 4959 [2022-07-20 13:16:55,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:55,843 INFO L413 NwaCegarLoop]: 2867 mSDtfsCounter, 1755 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 6826 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:55,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 6826 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2022-07-20 13:16:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3978. [2022-07-20 13:16:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3224 states have (on average 1.8005583126550868) internal successors, (5805), 3946 states have internal predecessors, (5805), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-20 13:16:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5869 transitions. [2022-07-20 13:16:55,896 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5869 transitions. Word has length 51 [2022-07-20 13:16:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:55,897 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5869 transitions. [2022-07-20 13:16:55,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5869 transitions. [2022-07-20 13:16:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 13:16:55,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:55,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:55,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:56,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:56,108 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-07-20 13:16:56,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855475536] [2022-07-20 13:16:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:56,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:56,110 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) [2022-07-20 13:16:56,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 13:16:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:56,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:56,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:56,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:56,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855475536] [2022-07-20 13:16:56,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855475536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:56,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:56,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:56,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529937613] [2022-07-20 13:16:56,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:56,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:56,377 INFO L87 Difference]: Start difference. First operand 3978 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:56,428 INFO L93 Difference]: Finished difference Result 4695 states and 6408 transitions. [2022-07-20 13:16:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-20 13:16:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:56,434 INFO L225 Difference]: With dead ends: 4695 [2022-07-20 13:16:56,434 INFO L226 Difference]: Without dead ends: 4695 [2022-07-20 13:16:56,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:56,435 INFO L413 NwaCegarLoop]: 2907 mSDtfsCounter, 1746 mSDsluCounter, 4048 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 6955 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:56,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 6955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-07-20 13:16:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 3960. [2022-07-20 13:16:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3206 states have (on average 1.8013100436681222) internal successors, (5775), 3928 states have internal predecessors, (5775), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-20 13:16:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5839 transitions. [2022-07-20 13:16:56,506 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5839 transitions. Word has length 54 [2022-07-20 13:16:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:56,507 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 5839 transitions. [2022-07-20 13:16:56,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5839 transitions. [2022-07-20 13:16:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 13:16:56,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:56,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:56,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:56,718 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2022-07-20 13:16:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:56,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777713917] [2022-07-20 13:16:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:56,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:56,720 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:56,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 13:16:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:16:56,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:57,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 13:16:57,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 13:16:57,038 INFO L356 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2022-07-20 13:16:57,039 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 3 case distinctions, treesize of input 29 treesize of output 36 [2022-07-20 13:16:57,066 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-20 13:16:57,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 20 [2022-07-20 13:16:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:57,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:57,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777713917] [2022-07-20 13:16:57,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777713917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:57,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:57,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041201989] [2022-07-20 13:16:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:57,092 INFO L87 Difference]: Start difference. First operand 3960 states and 5839 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:58,199 INFO L93 Difference]: Finished difference Result 3926 states and 5804 transitions. [2022-07-20 13:16:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-20 13:16:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:58,205 INFO L225 Difference]: With dead ends: 3926 [2022-07-20 13:16:58,205 INFO L226 Difference]: Without dead ends: 3926 [2022-07-20 13:16:58,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:58,205 INFO L413 NwaCegarLoop]: 1695 mSDtfsCounter, 759 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:58,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 4259 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 112 Unchecked, 1.1s Time] [2022-07-20 13:16:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2022-07-20 13:16:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3926. [2022-07-20 13:16:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3172 states have (on average 1.8095838587641866) internal successors, (5740), 3894 states have internal predecessors, (5740), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-20 13:16:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 5804 transitions. [2022-07-20 13:16:58,264 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 5804 transitions. Word has length 57 [2022-07-20 13:16:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:58,265 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 5804 transitions. [2022-07-20 13:16:58,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 5804 transitions. [2022-07-20 13:16:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 13:16:58,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:58,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:58,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:58,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:58,477 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-07-20 13:16:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224089407] [2022-07-20 13:16:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:58,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:58,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:58,479 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) [2022-07-20 13:16:58,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-20 13:16:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:58,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:58,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:58,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224089407] [2022-07-20 13:16:58,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224089407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:58,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:58,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:58,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451424204] [2022-07-20 13:16:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:58,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:58,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:58,883 INFO L87 Difference]: Start difference. First operand 3926 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:59,023 INFO L93 Difference]: Finished difference Result 5186 states and 7398 transitions. [2022-07-20 13:16:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-20 13:16:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:59,029 INFO L225 Difference]: With dead ends: 5186 [2022-07-20 13:16:59,029 INFO L226 Difference]: Without dead ends: 5186 [2022-07-20 13:16:59,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:59,029 INFO L413 NwaCegarLoop]: 1948 mSDtfsCounter, 870 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:59,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 3621 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 13:16:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2022-07-20 13:16:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4843. [2022-07-20 13:16:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4083 states have (on average 1.7891256429096252) internal successors, (7305), 4802 states have internal predecessors, (7305), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-20 13:16:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 7387 transitions. [2022-07-20 13:16:59,078 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 7387 transitions. Word has length 59 [2022-07-20 13:16:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:59,078 INFO L495 AbstractCegarLoop]: Abstraction has 4843 states and 7387 transitions. [2022-07-20 13:16:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 7387 transitions. [2022-07-20 13:16:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 13:16:59,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:59,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:59,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:59,289 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:16:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-07-20 13:16:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:59,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994450576] [2022-07-20 13:16:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:59,291 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) [2022-07-20 13:16:59,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-20 13:16:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 13:16:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:59,645 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 [2022-07-20 13:16:59,648 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 [2022-07-20 13:16:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 13:16:59,945 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 [2022-07-20 13:16:59,951 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 13:16:59,951 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 [2022-07-20 13:16:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:59,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:59,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:59,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994450576] [2022-07-20 13:16:59,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994450576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:59,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:59,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:59,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122165586] [2022-07-20 13:16:59,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:59,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:59,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:59,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:59,961 INFO L87 Difference]: Start difference. First operand 4843 states and 7387 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:03,005 INFO L93 Difference]: Finished difference Result 6874 states and 10400 transitions. [2022-07-20 13:17:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:03,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 13:17:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:03,013 INFO L225 Difference]: With dead ends: 6874 [2022-07-20 13:17:03,013 INFO L226 Difference]: Without dead ends: 6874 [2022-07-20 13:17:03,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:03,014 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 4069 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:03,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4083 Valid, 1047 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 13:17:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2022-07-20 13:17:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 4603. [2022-07-20 13:17:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 3927 states have (on average 1.7122485357779476) internal successors, (6724), 4562 states have internal predecessors, (6724), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-20 13:17:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 6806 transitions. [2022-07-20 13:17:03,064 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 6806 transitions. Word has length 62 [2022-07-20 13:17:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:03,065 INFO L495 AbstractCegarLoop]: Abstraction has 4603 states and 6806 transitions. [2022-07-20 13:17:03,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 6806 transitions. [2022-07-20 13:17:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:03,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:03,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:03,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:03,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:03,270 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-07-20 13:17:03,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:03,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874449898] [2022-07-20 13:17:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:03,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:03,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:03,273 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) [2022-07-20 13:17:03,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 13:17:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:17:03,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:03,544 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 [2022-07-20 13:17:03,556 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 [2022-07-20 13:17:03,577 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 [2022-07-20 13:17:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:03,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:03,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:03,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874449898] [2022-07-20 13:17:03,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874449898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:03,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:03,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680510162] [2022-07-20 13:17:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:03,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:03,586 INFO L87 Difference]: Start difference. First operand 4603 states and 6806 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:06,210 INFO L93 Difference]: Finished difference Result 4602 states and 6803 transitions. [2022-07-20 13:17:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:06,215 INFO L225 Difference]: With dead ends: 4602 [2022-07-20 13:17:06,215 INFO L226 Difference]: Without dead ends: 4602 [2022-07-20 13:17:06,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:06,215 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 4 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:06,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4589 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 13:17:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-20 13:17:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-20 13:17:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3927 states have (on average 1.711484593837535) internal successors, (6721), 4561 states have internal predecessors, (6721), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-20 13:17:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6803 transitions. [2022-07-20 13:17:06,252 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6803 transitions. Word has length 67 [2022-07-20 13:17:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:06,252 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6803 transitions. [2022-07-20 13:17:06,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6803 transitions. [2022-07-20 13:17:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:06,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:06,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:06,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:06,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:06,457 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:06,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:06,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-07-20 13:17:06,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:06,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061213349] [2022-07-20 13:17:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:06,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:06,459 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) [2022-07-20 13:17:06,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-20 13:17:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 13:17:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:06,737 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 [2022-07-20 13:17:06,750 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 [2022-07-20 13:17:06,755 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 [2022-07-20 13:17:06,798 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 [2022-07-20 13:17:06,800 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 [2022-07-20 13:17:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:06,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:06,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:06,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061213349] [2022-07-20 13:17:06,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061213349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:06,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:06,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:06,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535819779] [2022-07-20 13:17:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:06,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:06,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:06,812 INFO L87 Difference]: Start difference. First operand 4602 states and 6803 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:10,424 INFO L93 Difference]: Finished difference Result 4601 states and 6800 transitions. [2022-07-20 13:17:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:10,430 INFO L225 Difference]: With dead ends: 4601 [2022-07-20 13:17:10,430 INFO L226 Difference]: Without dead ends: 4601 [2022-07-20 13:17:10,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:10,431 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 2 mSDsluCounter, 2846 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4562 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:10,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4562 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-20 13:17:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-07-20 13:17:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4601. [2022-07-20 13:17:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 3924 states have (on average 1.7120285423037718) internal successors, (6718), 4560 states have internal predecessors, (6718), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-20 13:17:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 6800 transitions. [2022-07-20 13:17:10,465 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 6800 transitions. Word has length 67 [2022-07-20 13:17:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:10,466 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 6800 transitions. [2022-07-20 13:17:10,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 6800 transitions. [2022-07-20 13:17:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:10,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:10,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:10,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:10,676 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-07-20 13:17:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:10,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747836117] [2022-07-20 13:17:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:10,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:10,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:10,678 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) [2022-07-20 13:17:10,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 13:17:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:17:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:10,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-20 13:17:10,955 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 [2022-07-20 13:17:10,971 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 [2022-07-20 13:17:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:10,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:10,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747836117] [2022-07-20 13:17:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747836117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:10,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:10,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444327702] [2022-07-20 13:17:10,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:10,979 INFO L87 Difference]: Start difference. First operand 4601 states and 6800 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:13,494 INFO L93 Difference]: Finished difference Result 4600 states and 6796 transitions. [2022-07-20 13:17:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:13,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:13,499 INFO L225 Difference]: With dead ends: 4600 [2022-07-20 13:17:13,499 INFO L226 Difference]: Without dead ends: 4600 [2022-07-20 13:17:13,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:13,500 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 4 mSDsluCounter, 2870 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4584 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:13,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4584 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 13:17:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2022-07-20 13:17:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4600. [2022-07-20 13:17:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 3924 states have (on average 1.7110091743119267) internal successors, (6714), 4559 states have internal predecessors, (6714), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-20 13:17:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 6796 transitions. [2022-07-20 13:17:13,538 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 6796 transitions. Word has length 67 [2022-07-20 13:17:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:13,538 INFO L495 AbstractCegarLoop]: Abstraction has 4600 states and 6796 transitions. [2022-07-20 13:17:13,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 6796 transitions. [2022-07-20 13:17:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:13,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:13,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:13,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:13,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:13,749 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:13,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-07-20 13:17:13,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:13,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378418422] [2022-07-20 13:17:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:13,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:13,751 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) [2022-07-20 13:17:13,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-20 13:17:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:14,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 13:17:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:14,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:14,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:17:14,031 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 [2022-07-20 13:17:14,057 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 [2022-07-20 13:17:14,060 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 [2022-07-20 13:17:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:14,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:14,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378418422] [2022-07-20 13:17:14,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378418422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:14,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:14,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112093008] [2022-07-20 13:17:14,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:14,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:14,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:14,072 INFO L87 Difference]: Start difference. First operand 4600 states and 6796 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:17,613 INFO L93 Difference]: Finished difference Result 4599 states and 6792 transitions. [2022-07-20 13:17:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:17,618 INFO L225 Difference]: With dead ends: 4599 [2022-07-20 13:17:17,618 INFO L226 Difference]: Without dead ends: 4599 [2022-07-20 13:17:17,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:17,619 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 2 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4557 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:17,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4557 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-20 13:17:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2022-07-20 13:17:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4599. [2022-07-20 13:17:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 3920 states have (on average 1.711734693877551) internal successors, (6710), 4558 states have internal predecessors, (6710), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-20 13:17:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 6792 transitions. [2022-07-20 13:17:17,654 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 6792 transitions. Word has length 67 [2022-07-20 13:17:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:17,654 INFO L495 AbstractCegarLoop]: Abstraction has 4599 states and 6792 transitions. [2022-07-20 13:17:17,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 6792 transitions. [2022-07-20 13:17:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 13:17:17,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:17,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:17,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:17,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:17,865 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2062362287, now seen corresponding path program 1 times [2022-07-20 13:17:17,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:17,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161593456] [2022-07-20 13:17:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:17,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:17,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:17,867 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) [2022-07-20 13:17:17,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-20 13:17:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:17:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:18,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:18,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:18,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161593456] [2022-07-20 13:17:18,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161593456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:18,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:18,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12433366] [2022-07-20 13:17:18,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:18,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:18,158 INFO L87 Difference]: Start difference. First operand 4599 states and 6792 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-20 13:17:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:18,216 INFO L93 Difference]: Finished difference Result 4602 states and 6801 transitions. [2022-07-20 13:17:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 75 [2022-07-20 13:17:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:18,234 INFO L225 Difference]: With dead ends: 4602 [2022-07-20 13:17:18,234 INFO L226 Difference]: Without dead ends: 4602 [2022-07-20 13:17:18,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:18,235 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 2 mSDsluCounter, 3418 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:18,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:17:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-20 13:17:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-20 13:17:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3922 states have (on average 1.7116267210606833) internal successors, (6713), 4561 states have internal predecessors, (6713), 41 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-20 13:17:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6801 transitions. [2022-07-20 13:17:18,284 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6801 transitions. Word has length 75 [2022-07-20 13:17:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:18,284 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6801 transitions. [2022-07-20 13:17:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-20 13:17:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6801 transitions. [2022-07-20 13:17:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 13:17:18,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:18,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:18,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:18,499 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1092552202, now seen corresponding path program 1 times [2022-07-20 13:17:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366097786] [2022-07-20 13:17:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:18,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:18,501 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) [2022-07-20 13:17:18,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-20 13:17:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:17:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:18,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:18,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366097786] [2022-07-20 13:17:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366097786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:18,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:18,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 13:17:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506811404] [2022-07-20 13:17:18,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 13:17:18,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 13:17:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 13:17:18,869 INFO L87 Difference]: Start difference. First operand 4602 states and 6801 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2022-07-20 13:17:19,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:19,024 INFO L93 Difference]: Finished difference Result 4614 states and 6823 transitions. [2022-07-20 13:17:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 13:17:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 76 [2022-07-20 13:17:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:19,033 INFO L225 Difference]: With dead ends: 4614 [2022-07-20 13:17:19,033 INFO L226 Difference]: Without dead ends: 4614 [2022-07-20 13:17:19,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-07-20 13:17:19,034 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 15 mSDsluCounter, 6827 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8540 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:19,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8540 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 13:17:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2022-07-20 13:17:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4612. [2022-07-20 13:17:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 3931 states have (on average 1.7115237852963623) internal successors, (6728), 4570 states have internal predecessors, (6728), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-20 13:17:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 6816 transitions. [2022-07-20 13:17:19,075 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 6816 transitions. Word has length 76 [2022-07-20 13:17:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:19,075 INFO L495 AbstractCegarLoop]: Abstraction has 4612 states and 6816 transitions. [2022-07-20 13:17:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2022-07-20 13:17:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 6816 transitions. [2022-07-20 13:17:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 13:17:19,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:19,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:19,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:19,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:19,284 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1024769937, now seen corresponding path program 2 times [2022-07-20 13:17:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514940341] [2022-07-20 13:17:19,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 13:17:19,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:19,286 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) [2022-07-20 13:17:19,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-20 13:17:19,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 13:17:19,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:17:19,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:17:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:19,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:20,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:20,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514940341] [2022-07-20 13:17:20,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514940341] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:20,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:20,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 13:17:20,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226202647] [2022-07-20 13:17:20,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:20,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 13:17:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 13:17:20,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-20 13:17:20,005 INFO L87 Difference]: Start difference. First operand 4612 states and 6816 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2022-07-20 13:17:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:20,545 INFO L93 Difference]: Finished difference Result 4633 states and 6864 transitions. [2022-07-20 13:17:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 13:17:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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 79 [2022-07-20 13:17:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:20,554 INFO L225 Difference]: With dead ends: 4633 [2022-07-20 13:17:20,554 INFO L226 Difference]: Without dead ends: 4629 [2022-07-20 13:17:20,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2022-07-20 13:17:20,555 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 50 mSDsluCounter, 10264 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 11980 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:20,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 11980 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 13:17:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2022-07-20 13:17:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4621. [2022-07-20 13:17:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 3940 states have (on average 1.7106598984771573) internal successors, (6740), 4579 states have internal predecessors, (6740), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-20 13:17:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 6828 transitions. [2022-07-20 13:17:20,609 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 6828 transitions. Word has length 79 [2022-07-20 13:17:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:20,610 INFO L495 AbstractCegarLoop]: Abstraction has 4621 states and 6828 transitions. [2022-07-20 13:17:20,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2022-07-20 13:17:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 6828 transitions. [2022-07-20 13:17:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 13:17:20,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:20,613 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:20,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:20,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:20,826 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:20,827 INFO L85 PathProgramCache]: Analyzing trace with hash 876217103, now seen corresponding path program 3 times [2022-07-20 13:17:20,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:20,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525981653] [2022-07-20 13:17:20,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 13:17:20,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:20,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:20,828 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) [2022-07-20 13:17:20,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-20 13:17:21,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 13:17:21,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:17:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 13:17:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:21,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:22,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525981653] [2022-07-20 13:17:22,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525981653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:22,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:22,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 13:17:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210607679] [2022-07-20 13:17:22,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 13:17:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 13:17:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-20 13:17:22,169 INFO L87 Difference]: Start difference. First operand 4621 states and 6828 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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) [2022-07-20 13:17:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:24,936 INFO L93 Difference]: Finished difference Result 4663 states and 6965 transitions. [2022-07-20 13:17:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 13:17:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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 85 [2022-07-20 13:17:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:24,943 INFO L225 Difference]: With dead ends: 4663 [2022-07-20 13:17:24,943 INFO L226 Difference]: Without dead ends: 4657 [2022-07-20 13:17:24,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 13:17:24,944 INFO L413 NwaCegarLoop]: 1720 mSDtfsCounter, 125 mSDsluCounter, 20567 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 22287 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:24,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 22287 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 13:17:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2022-07-20 13:17:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 4639. [2022-07-20 13:17:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 3958 states have (on average 1.7086912582112177) internal successors, (6763), 4597 states have internal predecessors, (6763), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-20 13:17:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 6851 transitions. [2022-07-20 13:17:24,987 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 6851 transitions. Word has length 85 [2022-07-20 13:17:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:24,987 INFO L495 AbstractCegarLoop]: Abstraction has 4639 states and 6851 transitions. [2022-07-20 13:17:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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) [2022-07-20 13:17:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 6851 transitions. [2022-07-20 13:17:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 13:17:24,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:24,988 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:24,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:25,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:25,200 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash -990633905, now seen corresponding path program 4 times [2022-07-20 13:17:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:25,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518712748] [2022-07-20 13:17:25,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 13:17:25,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:25,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:25,202 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) [2022-07-20 13:17:25,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-20 13:17:25,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 13:17:25,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:17:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 13:17:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:25,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:27,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518712748] [2022-07-20 13:17:27,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518712748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:27,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:27,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-20 13:17:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698270324] [2022-07-20 13:17:27,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:27,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 13:17:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 13:17:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 13:17:27,145 INFO L87 Difference]: Start difference. First operand 4639 states and 6851 transitions. Second operand has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 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) [2022-07-20 13:17:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:37,407 INFO L93 Difference]: Finished difference Result 4719 states and 7068 transitions. [2022-07-20 13:17:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-20 13:17:37,417 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 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 97 [2022-07-20 13:17:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:37,424 INFO L225 Difference]: With dead ends: 4719 [2022-07-20 13:17:37,424 INFO L226 Difference]: Without dead ends: 4715 [2022-07-20 13:17:37,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-07-20 13:17:37,427 INFO L413 NwaCegarLoop]: 1733 mSDtfsCounter, 419 mSDsluCounter, 41453 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 43186 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:37,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 43186 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 3046 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 13:17:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2022-07-20 13:17:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4673. [2022-07-20 13:17:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 3992 states have (on average 1.7056613226452906) internal successors, (6809), 4631 states have internal predecessors, (6809), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-20 13:17:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 6897 transitions. [2022-07-20 13:17:37,473 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 6897 transitions. Word has length 97 [2022-07-20 13:17:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 4673 states and 6897 transitions. [2022-07-20 13:17:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 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) [2022-07-20 13:17:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 6897 transitions. [2022-07-20 13:17:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 13:17:37,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:37,475 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:37,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-20 13:17:37,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:37,686 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:17:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357521, now seen corresponding path program 5 times [2022-07-20 13:17:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:37,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296807324] [2022-07-20 13:17:37,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 13:17:37,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:37,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:37,689 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) [2022-07-20 13:17:37,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-20 13:17:38,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-20 13:17:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:17:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 13:17:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:39,026 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 [2022-07-20 13:17:39,110 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 13:17:39,110 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 [2022-07-20 13:17:39,147 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 [2022-07-20 13:17:39,206 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 22 treesize of output 10 [2022-07-20 13:17:40,217 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 13:17:40,217 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 [2022-07-20 13:17:40,239 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 [2022-07-20 13:17:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-20 13:17:40,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:40,464 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2712 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_2712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-20 13:17:40,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:40,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296807324] [2022-07-20 13:17:40,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296807324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 13:17:40,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [253325129] [2022-07-20 13:17:40,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 13:17:40,466 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 13:17:40,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 13:17:40,468 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 13:17:40,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-20 13:19:03,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-20 13:19:03,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:19:03,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 13:19:03,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:19:03,546 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 [2022-07-20 13:19:03,612 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 13:19:03,612 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 [2022-07-20 13:19:03,621 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 [2022-07-20 13:19:03,657 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 22 treesize of output 10 [2022-07-20 13:19:04,627 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 13:19:04,627 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 [2022-07-20 13:19:04,645 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 [2022-07-20 13:19:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-20 13:19:04,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:19:04,804 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3175 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3175) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-20 13:19:04,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [253325129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 13:19:04,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:19:04,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-20 13:19:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143021382] [2022-07-20 13:19:04,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:19:04,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 13:19:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:19:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 13:19:04,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=10, NotChecked=38, Total=156 [2022-07-20 13:19:04,807 INFO L87 Difference]: Start difference. First operand 4673 states and 6897 transitions. Second operand has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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) [2022-07-20 13:19:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:19:07,845 INFO L93 Difference]: Finished difference Result 6840 states and 10243 transitions. [2022-07-20 13:19:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 13:19:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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 119 [2022-07-20 13:19:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:19:07,854 INFO L225 Difference]: With dead ends: 6840 [2022-07-20 13:19:07,855 INFO L226 Difference]: Without dead ends: 6836 [2022-07-20 13:19:07,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 141 SyntacticMatches, 92 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=109, Unknown=12, NotChecked=46, Total=210 [2022-07-20 13:19:07,855 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 1589 mSDsluCounter, 4270 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 5916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3303 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 13:19:07,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 5242 Invalid, 5916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2601 Invalid, 0 Unknown, 3303 Unchecked, 2.9s Time] [2022-07-20 13:19:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2022-07-20 13:19:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 4721. [2022-07-20 13:19:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4040 states have (on average 1.6967821782178218) internal successors, (6855), 4678 states have internal predecessors, (6855), 41 states have call successors, (41), 5 states have call predecessors, (41), 6 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-20 13:19:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 6943 transitions. [2022-07-20 13:19:07,896 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 6943 transitions. Word has length 119 [2022-07-20 13:19:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:19:07,896 INFO L495 AbstractCegarLoop]: Abstraction has 4721 states and 6943 transitions. [2022-07-20 13:19:07,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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) [2022-07-20 13:19:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 6943 transitions. [2022-07-20 13:19:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 13:19:07,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:19:07,897 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:19:07,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-20 13:19:08,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-20 13:19:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:19:08,311 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-20 13:19:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:19:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357520, now seen corresponding path program 1 times [2022-07-20 13:19:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:19:08,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069760322] [2022-07-20 13:19:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:19:08,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:19:08,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:19:08,313 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) [2022-07-20 13:19:08,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-20 13:19:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:19:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-20 13:19:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:19:09,026 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 [2022-07-20 13:19:09,091 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 13:19:09,091 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 [2022-07-20 13:19:09,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-20 13:19:09,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-20 13:19:09,113 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 [2022-07-20 13:19:09,171 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 22 treesize of output 10 [2022-07-20 13:19:09,174 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 9 treesize of output 3 [2022-07-20 13:19:09,282 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3560 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3560))) (exists ((v_ArrVal_3559 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3559)))) is different from true [2022-07-20 13:19:09,288 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3561 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3561))) (exists ((v_ArrVal_3562 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3562))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-20 13:19:09,294 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3564 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3564) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3563 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3563) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:09,382 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3575 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3575) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3576 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3576)))) is different from true [2022-07-20 13:19:09,420 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3581 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3581))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3582 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3582)))) is different from true [2022-07-20 13:19:09,427 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3583 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3583))) (exists ((v_ArrVal_3584 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3584)))) is different from true [2022-07-20 13:19:09,433 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3585 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3585) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3586 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3586)))) is different from true [2022-07-20 13:19:09,457 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3589 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3589))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3590 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3590)))) is different from true [2022-07-20 13:19:09,496 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3595 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3595))) (exists ((v_ArrVal_3596 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3596) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:09,519 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3599 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3599))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3600 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3600) |c_#memory_$Pointer$.base|))) is different from true [2022-07-20 13:19:09,542 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3604 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3604) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3603 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3603) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:09,548 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3605 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3605) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3606 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3606)))) is different from true [2022-07-20 13:19:09,555 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3608 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3608) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3607 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3607) |c_#memory_$Pointer$.base|))) is different from true [2022-07-20 13:19:09,561 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3609 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3609) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3610)))) is different from true [2022-07-20 13:19:09,586 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3614 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3614) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3613 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3613) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:09,592 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3615 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3615) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3616 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3616)))) is different from true [2022-07-20 13:19:09,599 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3617) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_3618 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3618)))) is different from true [2022-07-20 13:19:09,622 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3621))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3622 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3622)))) is different from true [2022-07-20 13:19:09,669 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3625 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3625))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3626 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3626)))) is different from true [2022-07-20 13:19:09,677 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3627 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3627))) (exists ((v_ArrVal_3628 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3628)))) is different from true [2022-07-20 13:19:09,719 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3633 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3633))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3634 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3634)))) is different from true [2022-07-20 13:19:09,727 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3636 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3636))) (exists ((v_ArrVal_3635 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3635) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-20 13:19:09,733 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3637 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3637))) (exists ((v_ArrVal_3638 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3638)))) is different from true [2022-07-20 13:19:09,759 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 13:19:09,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-20 13:19:09,763 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 [2022-07-20 13:19:09,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-20 13:19:09,792 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 [2022-07-20 13:19:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 210 trivial. 759 not checked. [2022-07-20 13:19:09,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:19:10,372 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3729) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2022-07-20 13:19:10,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:19:10,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069760322] [2022-07-20 13:19:10,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069760322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 13:19:10,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [357789732] [2022-07-20 13:19:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:19:10,377 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 13:19:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 13:19:10,378 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 13:19:10,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process