./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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/ldv-memsafety/memleaks_test11.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:52:32,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:52:32,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:52:32,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:52:32,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:52:32,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:52:32,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:52:32,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:52:32,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:52:32,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:52:32,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:52:32,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:52:32,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:52:32,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:52:32,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:52:32,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:52:32,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:52:32,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:52:32,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:52:32,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:52:32,940 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:52:32,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:52:32,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:52:32,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:52:32,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:52:32,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:52:32,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:52:32,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:52:32,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:52:32,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:52:32,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:52:32,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:52:32,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:52:32,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:52:32,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:52:32,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:52:32,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:52:32,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:52:32,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:52:32,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:52:32,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:52:32,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:52:32,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:52:32,989 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:52:32,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:52:32,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:52:32,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:52:32,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:52:32,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:52:32,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:52:32,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:52:32,991 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:52:32,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:52:32,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:52:32,992 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:52:32,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:52:32,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:52:32,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:52:32,992 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:52:32,993 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:52:32,993 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:52:32,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:52:32,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:52:32,993 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:52:32,993 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:52:32,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:52:32,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:52:32,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:52:32,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:52:32,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:52:32,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:52:32,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:52:33,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:52:33,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc [2022-07-20 05:52:33,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:52:33,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:52:33,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:52:33,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:52:33,185 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:52:33,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-20 05:52:33,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c3af736/a0d9707261b744b9ab402d013a5d7e99/FLAGe12315411 [2022-07-20 05:52:33,609 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:52:33,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-20 05:52:33,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c3af736/a0d9707261b744b9ab402d013a5d7e99/FLAGe12315411 [2022-07-20 05:52:33,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c3af736/a0d9707261b744b9ab402d013a5d7e99 [2022-07-20 05:52:33,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:52:33,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:52:33,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:33,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:52:33,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:52:33,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:33" (1/1) ... [2022-07-20 05:52:33,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435dcd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:33, skipping insertion in model container [2022-07-20 05:52:33,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:33" (1/1) ... [2022-07-20 05:52:33,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:52:34,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:52:34,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:34,301 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 05:52:34,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27dd6f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:34, skipping insertion in model container [2022-07-20 05:52:34,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:34,302 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-20 05:52:34,304 INFO L158 Benchmark]: Toolchain (without parser) took 340.97ms. Allocated memory is still 98.6MB. Free memory was 75.2MB in the beginning and 61.7MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-20 05:52:34,305 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 75.5MB. Free memory was 49.6MB in the beginning and 49.5MB in the end (delta: 37.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 05:52:34,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.54ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 61.7MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-20 05:52:34,307 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 75.5MB. Free memory was 49.6MB in the beginning and 49.5MB in the end (delta: 37.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.54ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 61.7MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:52:35,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:52:35,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:52:35,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:52:35,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:52:35,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:52:35,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:52:35,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:52:35,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:52:35,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:52:35,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:52:35,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:52:35,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:52:35,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:52:35,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:52:35,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:52:35,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:52:35,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:52:35,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:52:35,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:52:35,688 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:52:35,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:52:35,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:52:35,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:52:35,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:52:35,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:52:35,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:52:35,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:52:35,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:52:35,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:52:35,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:52:35,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:52:35,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:52:35,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:52:35,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:52:35,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:52:35,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:52:35,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:52:35,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:52:35,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:52:35,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:52:35,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:52:35,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 05:52:35,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:52:35,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:52:35,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:52:35,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:52:35,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:52:35,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:52:35,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:52:35,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:52:35,720 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:52:35,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:52:35,720 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:52:35,720 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:52:35,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:52:35,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:52:35,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:52:35,721 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:52:35,721 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:52:35,721 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:52:35,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:52:35,721 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:52:35,721 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 05:52:35,721 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 05:52:35,722 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:52:35,722 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:52:35,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:52:35,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:52:35,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:52:35,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:52:35,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:52:35,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:52:35,723 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 05:52:35,723 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 05:52:35,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 05:52:35,723 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d286f1bc6bef2af97aa9bf8e95cd227fcca3bcb186ca467ee6b24a6fc8e433bc [2022-07-20 05:52:35,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:52:35,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:52:36,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:52:36,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:52:36,003 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:52:36,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-20 05:52:36,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a122796/f581f39765ce42718c1e0de54fcb69ae/FLAGb5f3a6706 [2022-07-20 05:52:36,521 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:52:36,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test11.i [2022-07-20 05:52:36,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a122796/f581f39765ce42718c1e0de54fcb69ae/FLAGb5f3a6706 [2022-07-20 05:52:37,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a122796/f581f39765ce42718c1e0de54fcb69ae [2022-07-20 05:52:37,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:52:37,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:52:37,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:37,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:52:37,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:52:37,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3bb899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37, skipping insertion in model container [2022-07-20 05:52:37,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:52:37,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:52:37,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:37,394 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-20 05:52:37,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:52:37,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:37,461 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:52:37,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:37,523 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:52:37,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37 WrapperNode [2022-07-20 05:52:37,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:37,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:52:37,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:52:37,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:52:37,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,582 INFO L137 Inliner]: procedures = 169, calls = 87, calls flagged for inlining = 26, calls inlined = 8, statements flattened = 92 [2022-07-20 05:52:37,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:52:37,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:52:37,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:52:37,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:52:37,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:52:37,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:52:37,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:52:37,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:52:37,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (1/1) ... [2022-07-20 05:52:37,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:52:37,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:37,646 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 05:52:37,653 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 05:52:37,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-20 05:52:37,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-20 05:52:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2022-07-20 05:52:37,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2022-07-20 05:52:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 05:52:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:52:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 05:52:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 05:52:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:52:37,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 05:52:37,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:52:37,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:52:37,810 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:52:37,824 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:52:38,102 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:52:38,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:52:38,106 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-20 05:52:38,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:52:38 BoogieIcfgContainer [2022-07-20 05:52:38,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:52:38,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:52:38,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:52:38,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:52:38,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:52:37" (1/3) ... [2022-07-20 05:52:38,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8e8ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:52:38, skipping insertion in model container [2022-07-20 05:52:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:37" (2/3) ... [2022-07-20 05:52:38,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8e8ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:52:38, skipping insertion in model container [2022-07-20 05:52:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:52:38" (3/3) ... [2022-07-20 05:52:38,113 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11.i [2022-07-20 05:52:38,127 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:52:38,128 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-07-20 05:52:38,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:52:38,158 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@53479a20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f57ce69 [2022-07-20 05:52:38,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2022-07-20 05:52:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:52:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:52:38,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:38,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:38,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1738627509, now seen corresponding path program 1 times [2022-07-20 05:52:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815245147] [2022-07-20 05:52:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:38,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:38,186 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 05:52:38,189 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 05:52:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:52:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:38,288 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 05:52:38,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:38,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:38,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815245147] [2022-07-20 05:52:38,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815245147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:38,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:38,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:52:38,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901250936] [2022-07-20 05:52:38,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:38,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:52:38,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:52:38,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:38,311 INFO L87 Difference]: Start difference. First operand has 85 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:52:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:38,389 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2022-07-20 05:52:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-20 05:52:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:38,397 INFO L225 Difference]: With dead ends: 157 [2022-07-20 05:52:38,397 INFO L226 Difference]: Without dead ends: 153 [2022-07-20 05:52:38,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:38,400 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 68 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:38,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 350 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-20 05:52:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 87. [2022-07-20 05:52:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 77 states have internal predecessors, (83), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-20 05:52:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2022-07-20 05:52:38,433 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 11 [2022-07-20 05:52:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:38,434 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2022-07-20 05:52:38,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:52:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2022-07-20 05:52:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:52:38,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:38,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:38,449 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 05:52:38,641 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 05:52:38,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash -851123828, now seen corresponding path program 1 times [2022-07-20 05:52:38,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:38,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488074788] [2022-07-20 05:52:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:38,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:38,644 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 05:52:38,645 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 05:52:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:52:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:38,697 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 05:52:38,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:38,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488074788] [2022-07-20 05:52:38,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488074788] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:38,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:38,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132949668] [2022-07-20 05:52:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:38,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:38,709 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:52:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:38,859 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2022-07-20 05:52:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-20 05:52:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:38,861 INFO L225 Difference]: With dead ends: 153 [2022-07-20 05:52:38,861 INFO L226 Difference]: Without dead ends: 151 [2022-07-20 05:52:38,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:38,862 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 66 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:38,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 304 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-20 05:52:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 83. [2022-07-20 05:52:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 74 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:52:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-07-20 05:52:38,887 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 11 [2022-07-20 05:52:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:38,887 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-07-20 05:52:38,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:52:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-07-20 05:52:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:38,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:38,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:38,897 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 05:52:39,095 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 05:52:39,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:39,097 INFO L85 PathProgramCache]: Analyzing trace with hash -470294884, now seen corresponding path program 1 times [2022-07-20 05:52:39,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:39,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72240431] [2022-07-20 05:52:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:39,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:39,100 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 05:52:39,102 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 05:52:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:39,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:52:39,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:52:39,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:39,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:39,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72240431] [2022-07-20 05:52:39,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72240431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:39,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:39,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:52:39,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370639267] [2022-07-20 05:52:39,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:39,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:52:39,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:52:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:39,170 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 05:52:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:39,223 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2022-07-20 05:52:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:39,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-20 05:52:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:39,224 INFO L225 Difference]: With dead ends: 150 [2022-07-20 05:52:39,224 INFO L226 Difference]: Without dead ends: 150 [2022-07-20 05:52:39,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:39,225 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 63 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:39,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 444 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-20 05:52:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 87. [2022-07-20 05:52:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.607843137254902) internal successors, (82), 77 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-20 05:52:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2022-07-20 05:52:39,231 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 17 [2022-07-20 05:52:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:39,232 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2022-07-20 05:52:39,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 05:52:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2022-07-20 05:52:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:39,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:39,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:39,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:39,439 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 05:52:39,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -470294895, now seen corresponding path program 1 times [2022-07-20 05:52:39,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:39,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896477429] [2022-07-20 05:52:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:39,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:39,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:39,442 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 05:52:39,444 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 05:52:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:39,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:52:39,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:39,511 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 05:52:39,612 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:52:39,612 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 18 treesize of output 25 [2022-07-20 05:52:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:39,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:41,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:41,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896477429] [2022-07-20 05:52:41,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896477429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:41,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:52:41,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-20 05:52:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644066248] [2022-07-20 05:52:41,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:52:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:52:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2022-07-20 05:52:41,798 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:52:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:41,930 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-07-20 05:52:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:52:41,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2022-07-20 05:52:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:41,931 INFO L225 Difference]: With dead ends: 107 [2022-07-20 05:52:41,932 INFO L226 Difference]: Without dead ends: 107 [2022-07-20 05:52:41,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-07-20 05:52:41,932 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:41,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 313 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-07-20 05:52:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-20 05:52:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-07-20 05:52:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 90 states have internal predecessors, (101), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-20 05:52:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2022-07-20 05:52:41,937 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 17 [2022-07-20 05:52:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:41,937 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2022-07-20 05:52:41,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:52:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2022-07-20 05:52:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:41,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:41,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:41,946 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 05:52:42,138 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 05:52:42,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:42,139 INFO L85 PathProgramCache]: Analyzing trace with hash -470294894, now seen corresponding path program 1 times [2022-07-20 05:52:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:42,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131506891] [2022-07-20 05:52:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:42,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:42,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:42,141 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 05:52:42,142 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 05:52:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:42,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:42,200 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 05:52:42,205 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 05:52:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:52:42,325 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 05:52:42,334 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:52:42,334 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 05:52:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:42,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:44,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131506891] [2022-07-20 05:52:44,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131506891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886411766] [2022-07-20 05:52:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:44,596 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:52:44,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:52:44,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:52:44,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-07-20 05:52:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:44,699 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 05:52:44,708 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 05:52:44,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:52:44,817 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 05:52:44,826 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:52:44,826 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 05:52:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:44,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:47,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [886411766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:47,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:52:47,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-20 05:52:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392999300] [2022-07-20 05:52:47,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:47,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:52:47,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:52:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-20 05:52:47,043 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 05:52:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:49,642 INFO L93 Difference]: Finished difference Result 179 states and 200 transitions. [2022-07-20 05:52:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:52:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-20 05:52:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:49,653 INFO L225 Difference]: With dead ends: 179 [2022-07-20 05:52:49,653 INFO L226 Difference]: Without dead ends: 179 [2022-07-20 05:52:49,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2022-07-20 05:52:49,661 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 139 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:49,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 559 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 391 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2022-07-20 05:52:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-20 05:52:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2022-07-20 05:52:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 95 states have (on average 1.5894736842105264) internal successors, (151), 120 states have internal predecessors, (151), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-20 05:52:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2022-07-20 05:52:49,681 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 17 [2022-07-20 05:52:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:49,681 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2022-07-20 05:52:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 05:52:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2022-07-20 05:52:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:49,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:49,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:49,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:49,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:50,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:52:50,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash -763697902, now seen corresponding path program 1 times [2022-07-20 05:52:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:50,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927865573] [2022-07-20 05:52:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:50,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:50,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:50,090 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 05:52:50,090 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 05:52:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:50,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:52:50,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:50,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:50,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:50,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927865573] [2022-07-20 05:52:50,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927865573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:50,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:50,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:52:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567786175] [2022-07-20 05:52:50,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:50,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:52:50,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:50,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:52:50,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:50,194 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 05:52:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:50,230 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2022-07-20 05:52:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-20 05:52:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:50,232 INFO L225 Difference]: With dead ends: 129 [2022-07-20 05:52:50,232 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 05:52:50,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:50,233 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:50,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 354 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 05:52:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-20 05:52:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 88 states have (on average 1.6022727272727273) internal successors, (141), 112 states have internal predecessors, (141), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-20 05:52:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-07-20 05:52:50,238 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 17 [2022-07-20 05:52:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:50,238 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-07-20 05:52:50,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 05:52:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-07-20 05:52:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:52:50,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:50,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:50,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-20 05:52:50,444 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 05:52:50,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:50,445 INFO L85 PathProgramCache]: Analyzing trace with hash -806735705, now seen corresponding path program 1 times [2022-07-20 05:52:50,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:50,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583800563] [2022-07-20 05:52:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:50,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:50,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:50,446 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 05:52:50,448 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 05:52:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:52:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:50,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:52:50,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:50,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583800563] [2022-07-20 05:52:50,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583800563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:50,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:52:50,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-20 05:52:50,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756220964] [2022-07-20 05:52:50,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:50,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:52:50,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:52:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:52:50,731 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:52:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:50,943 INFO L93 Difference]: Finished difference Result 126 states and 161 transitions. [2022-07-20 05:52:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:52:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2022-07-20 05:52:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:50,945 INFO L225 Difference]: With dead ends: 126 [2022-07-20 05:52:50,945 INFO L226 Difference]: Without dead ends: 126 [2022-07-20 05:52:50,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:52:50,945 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 138 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:50,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 274 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-07-20 05:52:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-20 05:52:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-20 05:52:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 88 states have (on average 1.5795454545454546) internal successors, (139), 111 states have internal predecessors, (139), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-20 05:52:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2022-07-20 05:52:50,950 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 18 [2022-07-20 05:52:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:50,951 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2022-07-20 05:52:50,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:52:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2022-07-20 05:52:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 05:52:50,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:50,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:50,957 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 05:52:51,157 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 05:52:51,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:52:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1173731936, now seen corresponding path program 1 times [2022-07-20 05:52:51,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:52:51,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903254118] [2022-07-20 05:52:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:51,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:52:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:52:51,159 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 05:52:51,160 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 05:52:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:52:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:52:51,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:55,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:52:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903254118] [2022-07-20 05:52:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903254118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1242723846] [2022-07-20 05:52:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:55,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:52:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:52:55,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:52:55,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-07-20 05:52:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:55,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 05:52:55,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:52:55,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:59,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1242723846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:59,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:52:59,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-20 05:52:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817870917] [2022-07-20 05:52:59,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:52:59,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:52:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:52:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-20 05:52:59,905 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:53:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:00,081 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2022-07-20 05:53:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:53:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-07-20 05:53:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:00,082 INFO L225 Difference]: With dead ends: 135 [2022-07-20 05:53:00,082 INFO L226 Difference]: Without dead ends: 128 [2022-07-20 05:53:00,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-20 05:53:00,083 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 14 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:00,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 519 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 164 Unchecked, 0.1s Time] [2022-07-20 05:53:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-20 05:53:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-07-20 05:53:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 85 states have (on average 1.588235294117647) internal successors, (135), 108 states have internal predecessors, (135), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-20 05:53:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-07-20 05:53:00,088 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 21 [2022-07-20 05:53:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:00,088 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-07-20 05:53:00,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:53:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-07-20 05:53:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:53:00,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:00,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:00,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:00,295 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 05:53:00,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:53:00,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:00,489 INFO L85 PathProgramCache]: Analyzing trace with hash -624729604, now seen corresponding path program 1 times [2022-07-20 05:53:00,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:00,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436364693] [2022-07-20 05:53:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:00,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:00,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:00,491 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 05:53:00,491 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 05:53:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:53:00,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:00,553 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 05:53:00,621 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 05:53:00,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-20 05:53:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:53:00,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:53:00,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:00,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436364693] [2022-07-20 05:53:00,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436364693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:00,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:53:00,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-20 05:53:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202143848] [2022-07-20 05:53:00,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:53:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:53:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:53:00,786 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:53:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:00,951 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2022-07-20 05:53:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:53:00,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-20 05:53:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:00,952 INFO L225 Difference]: With dead ends: 150 [2022-07-20 05:53:00,952 INFO L226 Difference]: Without dead ends: 150 [2022-07-20 05:53:00,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:53:00,953 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 19 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:00,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 285 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-07-20 05:53:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-20 05:53:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-07-20 05:53:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 105 states have (on average 1.561904761904762) internal successors, (164), 128 states have internal predecessors, (164), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-20 05:53:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-07-20 05:53:00,958 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 25 [2022-07-20 05:53:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:00,958 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-07-20 05:53:00,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:53:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-07-20 05:53:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:53:00,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:00,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:00,967 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 05:53:01,167 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 05:53:01,168 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash -624729603, now seen corresponding path program 1 times [2022-07-20 05:53:01,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679694209] [2022-07-20 05:53:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:01,170 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 05:53:01,170 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 05:53:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:53:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:01,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:53:05,433 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:53:05,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:53:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:53:05,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:05,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679694209] [2022-07-20 05:53:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679694209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [805097747] [2022-07-20 05:53:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:53:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:53:05,667 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:53:05,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-20 05:53:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:05,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:53:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:05,783 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 05:53:05,788 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 05:53:10,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:53:10,041 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 05:53:10,052 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:53:10,053 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 05:53:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:53:10,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:12,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [805097747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:12,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:53:12,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-20 05:53:12,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135408711] [2022-07-20 05:53:12,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:12,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:53:12,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:53:12,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=224, Unknown=5, NotChecked=0, Total=272 [2022-07-20 05:53:12,571 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:53:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:15,164 INFO L93 Difference]: Finished difference Result 242 states and 309 transitions. [2022-07-20 05:53:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:53:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-07-20 05:53:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:15,166 INFO L225 Difference]: With dead ends: 242 [2022-07-20 05:53:15,166 INFO L226 Difference]: Without dead ends: 242 [2022-07-20 05:53:15,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=56, Invalid=280, Unknown=6, NotChecked=0, Total=342 [2022-07-20 05:53:15,167 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 113 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:15,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 659 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 374 Invalid, 0 Unknown, 136 Unchecked, 0.5s Time] [2022-07-20 05:53:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-20 05:53:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 201. [2022-07-20 05:53:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.5686274509803921) internal successors, (240), 176 states have internal predecessors, (240), 16 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (23), 19 states have call predecessors, (23), 16 states have call successors, (23) [2022-07-20 05:53:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 279 transitions. [2022-07-20 05:53:15,172 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 279 transitions. Word has length 25 [2022-07-20 05:53:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:15,172 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 279 transitions. [2022-07-20 05:53:15,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:53:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 279 transitions. [2022-07-20 05:53:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:53:15,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:15,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:15,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:15,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:15,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:53:15,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:15,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1130288229, now seen corresponding path program 1 times [2022-07-20 05:53:15,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:15,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566182355] [2022-07-20 05:53:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:15,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:15,577 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 05:53:15,577 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 05:53:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:15,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:53:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:53:15,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:53:15,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566182355] [2022-07-20 05:53:15,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566182355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:53:15,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:53:15,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:53:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746325835] [2022-07-20 05:53:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:53:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:53:15,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:53:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:53:15,664 INFO L87 Difference]: Start difference. First operand 201 states and 279 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:53:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:15,701 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-07-20 05:53:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:53:15,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-20 05:53:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:15,702 INFO L225 Difference]: With dead ends: 158 [2022-07-20 05:53:15,702 INFO L226 Difference]: Without dead ends: 154 [2022-07-20 05:53:15,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:53:15,703 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:15,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 336 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:53:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-20 05:53:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-07-20 05:53:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 135 states have internal predecessors, (173), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-20 05:53:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2022-07-20 05:53:15,707 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 25 [2022-07-20 05:53:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:15,707 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2022-07-20 05:53:15,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:53:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2022-07-20 05:53:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:53:15,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:15,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:15,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:15,908 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 05:53:15,909 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2108218693, now seen corresponding path program 1 times [2022-07-20 05:53:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411707668] [2022-07-20 05:53:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:15,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:15,911 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 05:53:15,912 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 05:53:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:15,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:53:15,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:53:15,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:53:15,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:15,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411707668] [2022-07-20 05:53:15,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411707668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:53:15,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:53:15,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:53:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090648184] [2022-07-20 05:53:15,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:53:15,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:53:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:53:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:53:15,983 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:53:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:16,025 INFO L93 Difference]: Finished difference Result 198 states and 240 transitions. [2022-07-20 05:53:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:53:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-20 05:53:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:16,026 INFO L225 Difference]: With dead ends: 198 [2022-07-20 05:53:16,026 INFO L226 Difference]: Without dead ends: 198 [2022-07-20 05:53:16,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:53:16,027 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 53 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:16,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 422 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:53:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-20 05:53:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 151. [2022-07-20 05:53:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.5135135135135136) internal successors, (168), 132 states have internal predecessors, (168), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-20 05:53:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2022-07-20 05:53:16,030 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 26 [2022-07-20 05:53:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:16,031 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2022-07-20 05:53:16,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 05:53:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2022-07-20 05:53:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:53:16,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:16,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:16,038 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 05:53:16,237 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 05:53:16,238 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:16,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1299244922, now seen corresponding path program 1 times [2022-07-20 05:53:16,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:16,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661288780] [2022-07-20 05:53:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:16,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:16,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:16,240 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 05:53:16,240 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 05:53:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:53:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:53:16,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:53:16,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661288780] [2022-07-20 05:53:16,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661288780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:16,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:53:16,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-20 05:53:16,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851601141] [2022-07-20 05:53:16,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:16,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:53:16,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:53:16,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:53:16,671 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:53:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:16,743 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2022-07-20 05:53:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:53:16,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-07-20 05:53:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:16,744 INFO L225 Difference]: With dead ends: 172 [2022-07-20 05:53:16,744 INFO L226 Difference]: Without dead ends: 172 [2022-07-20 05:53:16,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:53:16,745 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 61 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:16,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 494 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-07-20 05:53:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-20 05:53:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2022-07-20 05:53:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.5043478260869565) internal successors, (173), 136 states have internal predecessors, (173), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-20 05:53:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2022-07-20 05:53:16,749 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 26 [2022-07-20 05:53:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:16,749 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2022-07-20 05:53:16,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:53:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2022-07-20 05:53:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:53:16,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:16,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:16,756 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 05:53:16,956 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 05:53:16,956 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash 930272189, now seen corresponding path program 1 times [2022-07-20 05:53:16,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:16,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977815805] [2022-07-20 05:53:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:16,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:16,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:16,958 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 05:53:16,959 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 05:53:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:53:17,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:17,069 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 05:53:17,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-20 05:53:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:53:17,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:53:17,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977815805] [2022-07-20 05:53:17,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977815805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:53:17,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:53:17,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:53:17,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169619333] [2022-07-20 05:53:17,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:53:17,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:53:17,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:17,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:53:17,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:53:17,111 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:53:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:17,260 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2022-07-20 05:53:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:53:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-20 05:53:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:17,262 INFO L225 Difference]: With dead ends: 173 [2022-07-20 05:53:17,262 INFO L226 Difference]: Without dead ends: 173 [2022-07-20 05:53:17,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:53:17,262 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 82 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:17,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 300 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-07-20 05:53:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-20 05:53:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-07-20 05:53:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 115 states have (on average 1.4869565217391305) internal successors, (171), 135 states have internal predecessors, (171), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-20 05:53:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 196 transitions. [2022-07-20 05:53:17,265 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 196 transitions. Word has length 27 [2022-07-20 05:53:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:17,265 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 196 transitions. [2022-07-20 05:53:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 05:53:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 196 transitions. [2022-07-20 05:53:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:53:17,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:17,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:17,272 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 05:53:17,471 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 05:53:17,471 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 930272190, now seen corresponding path program 1 times [2022-07-20 05:53:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:17,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232942880] [2022-07-20 05:53:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:17,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:17,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:17,473 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 05:53:17,474 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 05:53:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:53:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:17,550 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 05:53:17,555 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 05:53:17,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:53:17,696 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 05:53:17,705 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:53:17,705 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 05:53:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:53:17,792 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 05:53:17,804 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:53:17,804 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 05:53:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:53:17,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:20,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232942880] [2022-07-20 05:53:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232942880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1639987951] [2022-07-20 05:53:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:20,252 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:53:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:53:20,253 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:53:20,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-20 05:53:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:20,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 05:53:20,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:20,362 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 05:53:20,367 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 05:53:20,461 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:53:20,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:53:20,477 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:53:20,477 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 05:53:22,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:53:22,602 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 05:53:22,612 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:53:22,612 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 05:53:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:53:22,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:26,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1639987951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:26,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:53:26,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2022-07-20 05:53:26,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615438409] [2022-07-20 05:53:26,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:26,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:53:26,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:53:26,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2022-07-20 05:53:26,894 INFO L87 Difference]: Start difference. First operand 155 states and 196 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:53:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:27,561 INFO L93 Difference]: Finished difference Result 198 states and 217 transitions. [2022-07-20 05:53:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:53:27,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-07-20 05:53:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:27,562 INFO L225 Difference]: With dead ends: 198 [2022-07-20 05:53:27,562 INFO L226 Difference]: Without dead ends: 198 [2022-07-20 05:53:27,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=60, Invalid=281, Unknown=1, NotChecked=0, Total=342 [2022-07-20 05:53:27,563 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 152 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:27,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 751 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 515 Invalid, 0 Unknown, 65 Unchecked, 0.6s Time] [2022-07-20 05:53:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-20 05:53:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 126. [2022-07-20 05:53:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 109 states have internal predecessors, (130), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-20 05:53:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2022-07-20 05:53:27,567 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 27 [2022-07-20 05:53:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:27,567 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2022-07-20 05:53:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:53:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2022-07-20 05:53:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:53:27,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:27,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:27,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:27,776 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 05:53:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:53:27,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash 638376382, now seen corresponding path program 1 times [2022-07-20 05:53:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:27,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18708409] [2022-07-20 05:53:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:27,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:27,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:27,971 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 05:53:27,979 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 05:53:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:28,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:53:28,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:28,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:53:28,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:53:28,226 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-20 05:53:28,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-07-20 05:53:28,328 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:53:28,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-20 05:53:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:53:28,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:28,637 INFO L356 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-07-20 05:53:28,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 66 [2022-07-20 05:53:28,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:28,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18708409] [2022-07-20 05:53:28,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18708409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:28,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1851195625] [2022-07-20 05:53:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:28,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:53:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:53:28,703 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:53:28,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-07-20 05:53:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 05:53:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:28,819 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 05:53:28,971 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:53:28,971 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 05:53:29,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:53:31,109 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_18| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_18| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_18|) (_ bv0 32))))) is different from true [2022-07-20 05:53:31,193 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:53:31,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-20 05:53:31,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 05:53:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-20 05:53:31,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:31,349 INFO L356 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-07-20 05:53:31,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 05:53:31,356 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_252 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_252) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) is different from false [2022-07-20 05:53:31,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1851195625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:31,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:53:31,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-20 05:53:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737119593] [2022-07-20 05:53:31,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:31,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:53:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:53:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=783, Unknown=2, NotChecked=114, Total=992 [2022-07-20 05:53:31,372 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 21 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:53:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:41,678 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2022-07-20 05:53:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:53:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 21 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-07-20 05:53:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:41,680 INFO L225 Difference]: With dead ends: 181 [2022-07-20 05:53:41,680 INFO L226 Difference]: Without dead ends: 181 [2022-07-20 05:53:41,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=356, Invalid=2000, Unknown=4, NotChecked=190, Total=2550 [2022-07-20 05:53:41,681 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 397 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:41,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1087 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1156 Invalid, 0 Unknown, 144 Unchecked, 1.2s Time] [2022-07-20 05:53:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-20 05:53:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 95. [2022-07-20 05:53:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 82 states have internal predecessors, (87), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:53:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2022-07-20 05:53:41,684 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 29 [2022-07-20 05:53:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:41,684 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2022-07-20 05:53:41,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 21 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:53:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2022-07-20 05:53:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:53:41,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:41,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:41,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:41,893 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 05:53:42,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:53:42,087 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash 638376383, now seen corresponding path program 1 times [2022-07-20 05:53:42,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:42,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050771883] [2022-07-20 05:53:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:42,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:42,089 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 05:53:42,090 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 05:53:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:42,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:53:42,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:42,170 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 05:53:42,231 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:53:42,231 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 05:53:42,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:53:42,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:53:42,425 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:53:42,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-20 05:53:42,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 05:53:42,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 05:53:42,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:53:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:53:42,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:42,854 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:53:42,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-07-20 05:53:42,929 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_277 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_277) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset|))) (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (or (forall ((v_ArrVal_276 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_276) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (forall ((v_ArrVal_277 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_277) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (_ bv0 32))))) is different from false [2022-07-20 05:53:42,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:53:42,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050771883] [2022-07-20 05:53:42,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050771883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:42,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982695333] [2022-07-20 05:53:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:42,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:53:42,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:53:43,000 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:53:43,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-20 05:53:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 05:53:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:43,138 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 05:53:43,304 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 05:53:45,387 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:53:45,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-20 05:53:45,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:53:45,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:53:45,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-20 05:53:45,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 05:53:49,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:53:49,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:53:49,890 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:53:49,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 05:53:50,011 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:53:50,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-20 05:53:50,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 05:53:50,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:53:50,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 05:53:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:53:50,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:50,293 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_304 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_305 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_304) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_305) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) (forall ((v_ArrVal_304 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_304) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2022-07-20 05:53:52,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982695333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:52,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:53:52,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2022-07-20 05:53:52,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390109104] [2022-07-20 05:53:52,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:52,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 05:53:52,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:53:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 05:53:52,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1068, Unknown=13, NotChecked=134, Total=1332 [2022-07-20 05:53:52,745 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:53:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:58,287 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-07-20 05:53:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:53:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-07-20 05:53:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:58,289 INFO L225 Difference]: With dead ends: 106 [2022-07-20 05:53:58,289 INFO L226 Difference]: Without dead ends: 106 [2022-07-20 05:53:58,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=255, Invalid=1809, Unknown=14, NotChecked=178, Total=2256 [2022-07-20 05:53:58,290 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 136 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:58,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 730 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 717 Invalid, 0 Unknown, 113 Unchecked, 0.7s Time] [2022-07-20 05:53:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-20 05:53:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2022-07-20 05:53:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.303030303030303) internal successors, (86), 81 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:53:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2022-07-20 05:53:58,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 29 [2022-07-20 05:53:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:58,292 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2022-07-20 05:53:58,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 26 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:53:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2022-07-20 05:53:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 05:53:58,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:58,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:53:58,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-07-20 05:53:58,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-20 05:53:58,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:53:58,696 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:53:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1844886222, now seen corresponding path program 1 times [2022-07-20 05:53:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:53:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324664686] [2022-07-20 05:53:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:58,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:53:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:53:58,698 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 05:53:58,699 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 05:53:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:53:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:54:01,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:03,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:54:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324664686] [2022-07-20 05:54:03,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324664686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1158167286] [2022-07-20 05:54:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:03,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:54:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:54:03,357 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:54:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-20 05:54:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 05:54:03,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:54:19,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:23,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-20 05:54:25,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1158167286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:25,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:54:25,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2022-07-20 05:54:25,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414513389] [2022-07-20 05:54:25,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:54:25,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:54:25,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:54:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:54:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=784, Unknown=10, NotChecked=0, Total=930 [2022-07-20 05:54:25,795 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:54:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:54:25,975 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2022-07-20 05:54:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:54:25,975 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2022-07-20 05:54:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:54:25,976 INFO L225 Difference]: With dead ends: 99 [2022-07-20 05:54:25,976 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 05:54:25,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=145, Invalid=901, Unknown=10, NotChecked=0, Total=1056 [2022-07-20 05:54:25,977 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 13 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:54:25,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 477 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 216 Unchecked, 0.1s Time] [2022-07-20 05:54:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 05:54:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-07-20 05:54:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 72 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:54:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-07-20 05:54:25,979 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 32 [2022-07-20 05:54:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:54:25,979 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-07-20 05:54:25,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:54:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-07-20 05:54:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 05:54:25,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:54:25,979 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:54:25,988 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 05:54:26,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:54:26,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:54:26,387 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:54:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:54:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash -316571990, now seen corresponding path program 1 times [2022-07-20 05:54:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:54:26,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453576506] [2022-07-20 05:54:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:54:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:54:26,388 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 05:54:26,390 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 05:54:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:54:26,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:26,488 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 05:54:26,537 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:54:26,537 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 05:54:26,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:54:26,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:54:28,609 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17|)))) is different from true [2022-07-20 05:54:28,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:54:32,787 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-20 05:54:32,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-07-20 05:54:32,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-07-20 05:54:32,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-20 05:54:32,961 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 05:54:32,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-07-20 05:54:33,149 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 05:54:33,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-07-20 05:54:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-20 05:54:33,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:34,075 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_375 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |c_ULTIMATE.start_entry_point_~fe~1#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_375) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-07-20 05:54:36,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 77 [2022-07-20 05:54:36,285 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret45#1.base_34| (_ BitVec 32)) (v_ArrVal_375 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret45#1.base_34| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_34|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_375) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) is different from false [2022-07-20 05:54:36,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:54:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453576506] [2022-07-20 05:54:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453576506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [73641265] [2022-07-20 05:54:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:36,288 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:54:36,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:54:36,289 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:54:36,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-20 05:54:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-20 05:54:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:36,430 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 05:54:38,630 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:54:38,630 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 05:54:38,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:54:38,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:54:40,932 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 05:54:41,261 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 05:54:41,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-07-20 05:54:41,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2022-07-20 05:54:41,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-07-20 05:54:41,611 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 05:54:41,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-07-20 05:54:45,766 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:54:45,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-20 05:54:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:54:45,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:46,040 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_408 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |c_ULTIMATE.start_entry_point_~fe~1#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_408) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-07-20 05:54:47,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 77 [2022-07-20 05:54:47,313 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret45#1.base_37| (_ BitVec 32)) (v_ArrVal_375 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret45#1.base_37| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_37|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_375) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) is different from false [2022-07-20 05:54:47,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [73641265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:47,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:54:47,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2022-07-20 05:54:47,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677487277] [2022-07-20 05:54:47,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:54:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:54:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:54:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:54:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1581, Unknown=20, NotChecked=420, Total=2162 [2022-07-20 05:54:47,317 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 05:55:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:04,438 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2022-07-20 05:55:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 05:55:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2022-07-20 05:55:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:04,439 INFO L225 Difference]: With dead ends: 124 [2022-07-20 05:55:04,439 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 05:55:04,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=225, Invalid=2123, Unknown=24, NotChecked=490, Total=2862 [2022-07-20 05:55:04,440 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 55 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:04,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 925 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 634 Invalid, 0 Unknown, 449 Unchecked, 0.6s Time] [2022-07-20 05:55:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 05:55:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2022-07-20 05:55:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 84 states have internal predecessors, (90), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-07-20 05:55:04,443 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 38 [2022-07-20 05:55:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:04,443 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-07-20 05:55:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 05:55:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-07-20 05:55:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 05:55:04,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:04,444 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:04,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:04,653 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 05:55:04,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:55:04,847 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash -316571989, now seen corresponding path program 1 times [2022-07-20 05:55:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:04,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743830261] [2022-07-20 05:55:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:04,852 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 05:55:04,852 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 05:55:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:55:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:04,952 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 05:55:04,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:04,997 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 05:55:05,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:55:05,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:55:07,058 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_34| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_34|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_20|) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_34|))) is different from true [2022-07-20 05:55:09,090 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 05:55:09,098 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 05:55:11,299 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-20 05:55:11,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-07-20 05:55:11,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-07-20 05:55:11,522 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-20 05:55:11,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2022-07-20 05:55:11,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-07-20 05:55:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:13,765 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 05:55:13,774 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:13,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:55:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-20 05:55:13,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:16,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:16,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743830261] [2022-07-20 05:55:16,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743830261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:16,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1501140308] [2022-07-20 05:55:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:16,307 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:55:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:55:16,311 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:55:16,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-20 05:55:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:16,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-20 05:55:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:16,476 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 05:55:16,690 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:16,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:55:16,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:55:16,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:55:19,055 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 05:55:19,064 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 05:55:19,464 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 05:55:19,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-07-20 05:55:19,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 54 [2022-07-20 05:55:19,953 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 05:55:19,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2022-07-20 05:55:19,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-07-20 05:55:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:22,114 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 05:55:22,125 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:22,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:55:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:55:22,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:24,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1501140308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:24,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:55:24,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2022-07-20 05:55:24,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870735764] [2022-07-20 05:55:24,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:24,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:55:24,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:24,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:55:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=4, NotChecked=78, Total=1722 [2022-07-20 05:55:24,568 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:55:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:28,392 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2022-07-20 05:55:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:55:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2022-07-20 05:55:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:28,394 INFO L225 Difference]: With dead ends: 163 [2022-07-20 05:55:28,394 INFO L226 Difference]: Without dead ends: 163 [2022-07-20 05:55:28,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=211, Invalid=2140, Unknown=5, NotChecked=94, Total=2450 [2022-07-20 05:55:28,395 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 103 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 591 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:28,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 2431 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1082 Invalid, 0 Unknown, 591 Unchecked, 1.1s Time] [2022-07-20 05:55:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-20 05:55:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 98. [2022-07-20 05:55:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.289855072463768) internal successors, (89), 84 states have internal predecessors, (89), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2022-07-20 05:55:28,397 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 38 [2022-07-20 05:55:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:28,397 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2022-07-20 05:55:28,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 32 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:55:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2022-07-20 05:55:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 05:55:28,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:28,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:28,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:28,610 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 05:55:28,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:55:28,804 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1161043861, now seen corresponding path program 1 times [2022-07-20 05:55:28,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108403598] [2022-07-20 05:55:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:28,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:28,805 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 05:55:28,806 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 05:55:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:55:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:55:28,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:55:28,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108403598] [2022-07-20 05:55:28,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108403598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:55:28,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:55:28,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:55:28,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663224834] [2022-07-20 05:55:28,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:55:28,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:55:28,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:55:28,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:55:28,927 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:55:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:28,953 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-07-20 05:55:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:55:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-07-20 05:55:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:28,954 INFO L225 Difference]: With dead ends: 88 [2022-07-20 05:55:28,954 INFO L226 Difference]: Without dead ends: 84 [2022-07-20 05:55:28,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:55:28,954 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:28,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:55:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-20 05:55:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-07-20 05:55:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.280701754385965) internal successors, (73), 70 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:55:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-07-20 05:55:28,956 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 38 [2022-07-20 05:55:28,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:28,957 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-07-20 05:55:28,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:55:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-07-20 05:55:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 05:55:28,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:28,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:28,964 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 05:55:29,163 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 05:55:29,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash 717010680, now seen corresponding path program 1 times [2022-07-20 05:55:29,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:29,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877745384] [2022-07-20 05:55:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:29,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:29,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:29,165 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 05:55:29,166 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 05:55:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:55:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:55:29,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:55:29,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877745384] [2022-07-20 05:55:29,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877745384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:55:29,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:55:29,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:55:29,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019989854] [2022-07-20 05:55:29,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:55:29,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:55:29,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:29,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:55:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:55:29,267 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:55:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:29,298 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-07-20 05:55:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:55:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-07-20 05:55:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:29,299 INFO L225 Difference]: With dead ends: 122 [2022-07-20 05:55:29,299 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 05:55:29,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:55:29,299 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 36 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:29,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 283 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:55:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 05:55:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2022-07-20 05:55:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:55:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-07-20 05:55:29,302 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 40 [2022-07-20 05:55:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:29,302 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-07-20 05:55:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:55:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-07-20 05:55:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 05:55:29,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:29,303 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:29,312 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 05:55:29,509 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 05:55:29,509 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1835146281, now seen corresponding path program 1 times [2022-07-20 05:55:29,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:29,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147024903] [2022-07-20 05:55:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:29,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:29,511 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 05:55:29,511 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 05:55:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:55:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:55:29,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:55:29,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147024903] [2022-07-20 05:55:29,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147024903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:55:29,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:55:29,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:55:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392167381] [2022-07-20 05:55:29,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:55:29,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:55:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:55:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:55:29,649 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:55:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:29,846 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-07-20 05:55:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:55:29,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-07-20 05:55:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:29,847 INFO L225 Difference]: With dead ends: 116 [2022-07-20 05:55:29,847 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 05:55:29,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:55:29,848 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 46 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:29,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 254 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:55:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 05:55:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2022-07-20 05:55:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 79 states have internal predecessors, (82), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-20 05:55:29,850 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 40 [2022-07-20 05:55:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:29,851 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-20 05:55:29,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:55:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-20 05:55:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 05:55:29,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:29,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:29,860 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 05:55:30,058 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 05:55:30,058 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:30,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:30,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1835146280, now seen corresponding path program 1 times [2022-07-20 05:55:30,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:30,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618497674] [2022-07-20 05:55:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:30,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:30,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:30,060 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 05:55:30,060 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 05:55:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 05:55:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:30,164 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 05:55:30,169 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 05:55:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:30,308 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 05:55:30,316 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:30,316 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 05:55:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:30,414 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 05:55:30,425 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:30,425 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 05:55:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 4 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:55:32,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:35,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618497674] [2022-07-20 05:55:35,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618497674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1075652477] [2022-07-20 05:55:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:35,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:55:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:55:35,478 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:55:35,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-20 05:55:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-20 05:55:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:35,652 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 05:55:35,659 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 05:55:35,773 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:55:35,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:55:35,786 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:35,787 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 05:55:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:35,914 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 05:55:35,923 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:35,923 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 05:55:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:55:35,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1075652477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:41,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:55:41,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2022-07-20 05:55:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667165758] [2022-07-20 05:55:41,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:41,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:55:41,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:55:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=402, Unknown=3, NotChecked=0, Total=462 [2022-07-20 05:55:41,554 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:55:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:44,168 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2022-07-20 05:55:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:55:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-07-20 05:55:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:44,169 INFO L225 Difference]: With dead ends: 127 [2022-07-20 05:55:44,170 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 05:55:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=95, Invalid=603, Unknown=4, NotChecked=0, Total=702 [2022-07-20 05:55:44,170 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 105 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:44,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 588 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 387 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-07-20 05:55:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 05:55:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2022-07-20 05:55:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 79 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-07-20 05:55:44,173 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 40 [2022-07-20 05:55:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:44,173 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-07-20 05:55:44,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:55:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-07-20 05:55:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 05:55:44,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:44,174 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:44,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:44,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-20 05:55:44,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:55:44,581 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash 752121782, now seen corresponding path program 1 times [2022-07-20 05:55:44,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:44,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454338412] [2022-07-20 05:55:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:44,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:44,584 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:55:44,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-20 05:55:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:55:44,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:44,718 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 05:55:44,767 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 05:55:44,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-20 05:55:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:55:44,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:55:44,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:44,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454338412] [2022-07-20 05:55:44,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454338412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:55:44,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:55:44,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:55:44,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563622060] [2022-07-20 05:55:44,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:55:44,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:55:44,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:55:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:55:44,802 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:55:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:44,981 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2022-07-20 05:55:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:55:44,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-07-20 05:55:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:44,982 INFO L225 Difference]: With dead ends: 99 [2022-07-20 05:55:44,982 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 05:55:44,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:55:44,982 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 44 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:44,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 247 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-07-20 05:55:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 05:55:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-07-20 05:55:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 78 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-07-20 05:55:44,985 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 41 [2022-07-20 05:55:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:44,985 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-07-20 05:55:44,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:55:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-07-20 05:55:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 05:55:44,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:44,986 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:45,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:45,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:55:45,202 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash 752121783, now seen corresponding path program 1 times [2022-07-20 05:55:45,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:45,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444019077] [2022-07-20 05:55:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:45,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:45,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:45,203 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 05:55:45,207 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 05:55:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:45,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 05:55:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:45,334 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 05:55:45,340 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 05:55:45,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:45,463 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 05:55:45,472 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:45,472 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 05:55:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:45,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:55:45,583 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:45,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:55:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:45,720 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 05:55:45,727 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:45,728 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 05:55:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:55:45,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:48,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:48,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444019077] [2022-07-20 05:55:48,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444019077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:48,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [874818063] [2022-07-20 05:55:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:48,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:55:48,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:55:48,705 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 05:55:48,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-20 05:55:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 05:55:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:48,905 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 05:55:48,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:55:49,022 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:49,022 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 05:55:49,030 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 05:55:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:51,144 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 05:55:51,154 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:51,154 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 05:55:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:51,258 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 05:55:51,268 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:55:51,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:55:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:55:51,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:53,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [874818063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:53,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:55:53,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2022-07-20 05:55:53,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506045470] [2022-07-20 05:55:53,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:55:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:55:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=297, Unknown=1, NotChecked=0, Total=342 [2022-07-20 05:55:53,816 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:55:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:54,586 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2022-07-20 05:55:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:55:54,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-07-20 05:55:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:54,587 INFO L225 Difference]: With dead ends: 132 [2022-07-20 05:55:54,587 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 05:55:54,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=80, Invalid=519, Unknown=1, NotChecked=0, Total=600 [2022-07-20 05:55:54,588 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 142 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:54,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 500 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 372 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-07-20 05:55:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 05:55:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 91. [2022-07-20 05:55:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 77 states have internal predecessors, (79), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-07-20 05:55:54,590 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 41 [2022-07-20 05:55:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:54,590 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-07-20 05:55:54,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:55:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-07-20 05:55:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:55:54,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:54,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:54,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:54,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-07-20 05:55:54,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:55:54,999 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1833421355, now seen corresponding path program 1 times [2022-07-20 05:55:55,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:55,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153655532] [2022-07-20 05:55:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:55,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:55,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:55,002 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:55:55,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-20 05:55:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 05:55:55,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:55:55,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:55,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:55:55,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-07-20 05:55:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:55:56,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:56,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153655532] [2022-07-20 05:55:56,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153655532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:55:56,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:55:56,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-20 05:55:56,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392144428] [2022-07-20 05:55:56,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:56,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 05:55:56,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:56,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 05:55:56,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:55:56,314 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-20 05:55:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:57,045 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-07-20 05:55:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:55:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 46 [2022-07-20 05:55:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:57,046 INFO L225 Difference]: With dead ends: 90 [2022-07-20 05:55:57,046 INFO L226 Difference]: Without dead ends: 90 [2022-07-20 05:55:57,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-07-20 05:55:57,047 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 169 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:57,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 443 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:55:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-20 05:55:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-20 05:55:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.2) internal successors, (78), 76 states have internal predecessors, (78), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-07-20 05:55:57,049 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 46 [2022-07-20 05:55:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:57,049 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-07-20 05:55:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-20 05:55:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-07-20 05:55:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:55:57,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:57,050 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:57,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-07-20 05:55:57,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:55:57,258 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:57,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1833421356, now seen corresponding path program 1 times [2022-07-20 05:55:57,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:57,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799708601] [2022-07-20 05:55:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:57,259 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:55:57,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-20 05:55:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:55:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:55:57,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:55:57,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:57,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799708601] [2022-07-20 05:55:57,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799708601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:55:57,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:55:57,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:55:57,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062223940] [2022-07-20 05:55:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:55:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:55:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:55:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:55:57,433 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:55:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:57,706 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2022-07-20 05:55:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:55:57,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-07-20 05:55:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:57,707 INFO L225 Difference]: With dead ends: 160 [2022-07-20 05:55:57,707 INFO L226 Difference]: Without dead ends: 160 [2022-07-20 05:55:57,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:55:57,707 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 109 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:57,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 354 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 169 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-07-20 05:55:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-20 05:55:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 98. [2022-07-20 05:55:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 82 states have internal predecessors, (85), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:55:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-07-20 05:55:57,710 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 46 [2022-07-20 05:55:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:57,710 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-07-20 05:55:57,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:55:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-07-20 05:55:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 05:55:57,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:57,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:57,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-20 05:55:57,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:55:57,918 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:57,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1963012722, now seen corresponding path program 1 times [2022-07-20 05:55:57,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:57,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905348622] [2022-07-20 05:55:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:57,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:57,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:57,920 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:55:57,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-20 05:55:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 05:55:58,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:55:58,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:55:58,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:58,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905348622] [2022-07-20 05:55:58,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905348622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:55:58,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:55:58,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:55:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813356818] [2022-07-20 05:55:58,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:55:58,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:55:58,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:55:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:55:58,086 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:55:58,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:58,264 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-07-20 05:55:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:55:58,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-07-20 05:55:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:58,265 INFO L225 Difference]: With dead ends: 104 [2022-07-20 05:55:58,265 INFO L226 Difference]: Without dead ends: 104 [2022-07-20 05:55:58,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:55:58,266 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 81 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:58,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 235 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:55:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-20 05:55:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2022-07-20 05:55:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.1875) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:55:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-07-20 05:55:58,268 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 47 [2022-07-20 05:55:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:58,268 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-07-20 05:55:58,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:55:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-07-20 05:55:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 05:55:58,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:58,269 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:55:58,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:58,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:55:58,476 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:55:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1021505201, now seen corresponding path program 1 times [2022-07-20 05:55:58,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:55:58,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524688738] [2022-07-20 05:55:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:58,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:55:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:55:58,478 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:55:58,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-20 05:55:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:55:58,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:58,731 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 05:55:58,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:55:58,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:55:58,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:55:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:55:58,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:59,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-07-20 05:55:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:59,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:59,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 05:55:59,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:59,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:55:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:55:59,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:55:59,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524688738] [2022-07-20 05:55:59,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524688738] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:59,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:55:59,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 19 [2022-07-20 05:55:59,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670154393] [2022-07-20 05:55:59,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:55:59,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:55:59,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:55:59,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:55:59,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:55:59,843 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:00,687 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2022-07-20 05:56:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:56:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-07-20 05:56:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:00,688 INFO L225 Difference]: With dead ends: 131 [2022-07-20 05:56:00,688 INFO L226 Difference]: Without dead ends: 131 [2022-07-20 05:56:00,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:56:00,689 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 202 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:00,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 503 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:56:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-20 05:56:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2022-07-20 05:56:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 79 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-20 05:56:00,691 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 51 [2022-07-20 05:56:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:00,692 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-20 05:56:00,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-20 05:56:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 05:56:00,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:00,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:00,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:00,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:00,901 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1703598893, now seen corresponding path program 1 times [2022-07-20 05:56:00,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:00,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594118337] [2022-07-20 05:56:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:00,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:00,904 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:00,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-20 05:56:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 05:56:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:01,276 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 05:56:01,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:56:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 05:56:01,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:01,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 05:56:01,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 05:56:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:02,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:02,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594118337] [2022-07-20 05:56:02,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594118337] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:02,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:56:02,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 22 [2022-07-20 05:56:02,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921168806] [2022-07-20 05:56:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:56:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:56:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:56:02,088 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:56:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:02,864 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-07-20 05:56:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:56:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-07-20 05:56:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:02,866 INFO L225 Difference]: With dead ends: 92 [2022-07-20 05:56:02,866 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 05:56:02,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:56:02,867 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 172 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:02,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 456 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:56:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 05:56:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-20 05:56:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 78 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-07-20 05:56:02,869 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 52 [2022-07-20 05:56:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:02,869 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-07-20 05:56:02,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:56:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-07-20 05:56:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 05:56:02,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:02,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:02,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-07-20 05:56:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:03,078 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1601898209, now seen corresponding path program 1 times [2022-07-20 05:56:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:03,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929792106] [2022-07-20 05:56:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:03,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:03,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:03,079 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:03,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-20 05:56:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:03,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:56:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:03,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:03,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:03,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929792106] [2022-07-20 05:56:03,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929792106] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:03,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:03,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-20 05:56:03,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740812365] [2022-07-20 05:56:03,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:03,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:56:03,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:56:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:56:03,312 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:03,349 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-07-20 05:56:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:56:03,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-07-20 05:56:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:03,350 INFO L225 Difference]: With dead ends: 91 [2022-07-20 05:56:03,350 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 05:56:03,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:56:03,351 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 25 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:03,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 212 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:56:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 05:56:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-20 05:56:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-07-20 05:56:03,354 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 52 [2022-07-20 05:56:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:03,354 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-07-20 05:56:03,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-07-20 05:56:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:56:03,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:03,355 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:03,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:03,564 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1271958025, now seen corresponding path program 1 times [2022-07-20 05:56:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:03,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446522102] [2022-07-20 05:56:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:03,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:03,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:03,566 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:03,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-20 05:56:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 05:56:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:04,370 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 05:56:04,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:56:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:56:04,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:05,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 05:56:05,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 05:56:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:05,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:05,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446522102] [2022-07-20 05:56:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446522102] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:05,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:56:05,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 30 [2022-07-20 05:56:05,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856717042] [2022-07-20 05:56:05,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:05,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:56:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:56:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:56:05,968 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:56:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:07,868 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2022-07-20 05:56:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:56:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2022-07-20 05:56:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:07,869 INFO L225 Difference]: With dead ends: 140 [2022-07-20 05:56:07,869 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 05:56:07,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:56:07,870 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 207 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:07,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 558 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 05:56:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 05:56:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 102. [2022-07-20 05:56:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.1375) internal successors, (91), 87 states have internal predecessors, (91), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:56:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-07-20 05:56:07,872 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 53 [2022-07-20 05:56:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:07,872 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-07-20 05:56:07,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:56:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-07-20 05:56:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:56:07,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:07,873 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:07,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:08,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:08,089 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1880762957, now seen corresponding path program 1 times [2022-07-20 05:56:08,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:08,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689361823] [2022-07-20 05:56:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:08,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:08,091 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:08,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-20 05:56:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:56:08,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:56:08,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:08,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:08,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689361823] [2022-07-20 05:56:08,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689361823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:08,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:08,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-20 05:56:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540918259] [2022-07-20 05:56:08,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:08,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:56:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:56:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:08,831 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:08,880 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-07-20 05:56:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:56:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 53 [2022-07-20 05:56:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:08,881 INFO L225 Difference]: With dead ends: 109 [2022-07-20 05:56:08,881 INFO L226 Difference]: Without dead ends: 109 [2022-07-20 05:56:08,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:08,882 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 46 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:08,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 311 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 80 Unchecked, 0.0s Time] [2022-07-20 05:56:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-20 05:56:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2022-07-20 05:56:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 90 states have internal predecessors, (94), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 05:56:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-20 05:56:08,884 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 53 [2022-07-20 05:56:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:08,884 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-20 05:56:08,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-20 05:56:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:56:08,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:08,885 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:08,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:09,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:09,093 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1060607112, now seen corresponding path program 1 times [2022-07-20 05:56:09,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:09,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38483758] [2022-07-20 05:56:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:09,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:09,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:09,094 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:09,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-20 05:56:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:09,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:56:09,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:09,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:56:09,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:09,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38483758] [2022-07-20 05:56:09,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38483758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:56:09,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:56:09,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:56:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673552749] [2022-07-20 05:56:09,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:09,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:56:09,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:56:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:56:09,238 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:09,259 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-07-20 05:56:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:56:09,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-07-20 05:56:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:09,260 INFO L225 Difference]: With dead ends: 107 [2022-07-20 05:56:09,260 INFO L226 Difference]: Without dead ends: 107 [2022-07-20 05:56:09,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:56:09,261 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 24 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:09,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 266 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:56:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-20 05:56:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-07-20 05:56:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 79 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-20 05:56:09,262 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 53 [2022-07-20 05:56:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:09,263 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-20 05:56:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:56:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-20 05:56:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 05:56:09,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:09,263 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:09,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:09,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:09,471 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash -775746731, now seen corresponding path program 1 times [2022-07-20 05:56:09,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:09,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024433125] [2022-07-20 05:56:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:09,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:09,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:09,473 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:09,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-20 05:56:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 05:56:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:09,777 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 05:56:09,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 05:56:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:56:09,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:10,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-07-20 05:56:10,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-07-20 05:56:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:10,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024433125] [2022-07-20 05:56:10,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024433125] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:10,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:56:10,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 24 [2022-07-20 05:56:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735047474] [2022-07-20 05:56:10,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:56:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:56:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:56:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-20 05:56:10,596 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:56:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:11,357 INFO L93 Difference]: Finished difference Result 107 states and 106 transitions. [2022-07-20 05:56:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:56:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-07-20 05:56:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:11,358 INFO L225 Difference]: With dead ends: 107 [2022-07-20 05:56:11,358 INFO L226 Difference]: Without dead ends: 107 [2022-07-20 05:56:11,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:56:11,359 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 177 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:11,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 628 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:56:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-20 05:56:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-07-20 05:56:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.095890410958904) internal successors, (80), 79 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-07-20 05:56:11,361 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 54 [2022-07-20 05:56:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:11,361 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-07-20 05:56:11,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 05:56:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-07-20 05:56:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 05:56:11,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:11,362 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:11,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:11,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:11,570 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash -775993003, now seen corresponding path program 1 times [2022-07-20 05:56:11,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:11,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235174519] [2022-07-20 05:56:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:11,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:11,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:11,572 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:11,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-20 05:56:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 05:56:11,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:11,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:56:11,890 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 05:56:12,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-20 05:56:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:56:12,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:12,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2022-07-20 05:56:12,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235174519] [2022-07-20 05:56:12,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235174519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1589497282] [2022-07-20 05:56:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:12,448 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:12,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:56:12,449 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:56:12,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-07-20 05:56:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:12,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 05:56:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:12,685 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 05:56:12,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:56:12,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-20 05:56:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:56:12,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:13,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2022-07-20 05:56:13,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1589497282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:13,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:13,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2022-07-20 05:56:13,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655135877] [2022-07-20 05:56:13,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:13,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:56:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:56:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:56:13,073 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 05:56:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:13,328 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-07-20 05:56:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:56:13,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2022-07-20 05:56:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:13,328 INFO L225 Difference]: With dead ends: 92 [2022-07-20 05:56:13,329 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 05:56:13,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:56:13,329 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 23 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:13,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 343 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-07-20 05:56:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 05:56:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-20 05:56:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.082191780821918) internal successors, (79), 78 states have internal predecessors, (79), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-07-20 05:56:13,331 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 54 [2022-07-20 05:56:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:13,331 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-07-20 05:56:13,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 05:56:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-07-20 05:56:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 05:56:13,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:13,332 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:13,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:13,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:13,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:13,740 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1825890595, now seen corresponding path program 1 times [2022-07-20 05:56:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:13,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68394867] [2022-07-20 05:56:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:13,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:13,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:13,742 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:13,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-20 05:56:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:13,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:56:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:13,861 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 05:56:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:56:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:56:14,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:14,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68394867] [2022-07-20 05:56:14,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68394867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:14,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:14,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-20 05:56:14,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473422519] [2022-07-20 05:56:14,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:14,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:56:14,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:56:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:56:14,050 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:56:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:14,178 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-07-20 05:56:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:56:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-07-20 05:56:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:14,179 INFO L225 Difference]: With dead ends: 93 [2022-07-20 05:56:14,179 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 05:56:14,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:56:14,179 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 20 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:14,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 250 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-07-20 05:56:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 05:56:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-20 05:56:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 79 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-07-20 05:56:14,181 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 54 [2022-07-20 05:56:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:14,181 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-07-20 05:56:14,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:56:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-07-20 05:56:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 05:56:14,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:14,182 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:14,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:14,382 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1960758395, now seen corresponding path program 1 times [2022-07-20 05:56:14,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:14,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889914127] [2022-07-20 05:56:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:14,384 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:14,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-07-20 05:56:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:56:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:56:14,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:15,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889914127] [2022-07-20 05:56:15,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889914127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:15,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:15,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-20 05:56:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012699270] [2022-07-20 05:56:15,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:15,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:56:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:56:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:15,149 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:15,174 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-07-20 05:56:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:56:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 56 [2022-07-20 05:56:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:15,175 INFO L225 Difference]: With dead ends: 95 [2022-07-20 05:56:15,175 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 05:56:15,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:15,175 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 64 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:15,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 192 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-07-20 05:56:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 05:56:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-20 05:56:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-07-20 05:56:15,177 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 56 [2022-07-20 05:56:15,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:15,177 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-07-20 05:56:15,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-07-20 05:56:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 05:56:15,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:15,178 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:15,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:15,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:15,385 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2093454019, now seen corresponding path program 1 times [2022-07-20 05:56:15,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:15,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667253988] [2022-07-20 05:56:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:15,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:15,387 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:15,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-07-20 05:56:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:56:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:56:15,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:16,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:16,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667253988] [2022-07-20 05:56:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667253988] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:16,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:16,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-20 05:56:16,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131328964] [2022-07-20 05:56:16,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:16,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:56:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:56:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:16,135 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:16,160 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-07-20 05:56:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:56:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 57 [2022-07-20 05:56:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:16,161 INFO L225 Difference]: With dead ends: 94 [2022-07-20 05:56:16,161 INFO L226 Difference]: Without dead ends: 94 [2022-07-20 05:56:16,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:16,162 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 71 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:16,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 389 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-07-20 05:56:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-20 05:56:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-20 05:56:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 80 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-07-20 05:56:16,164 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 57 [2022-07-20 05:56:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:16,164 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-07-20 05:56:16,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-07-20 05:56:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 05:56:16,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:16,165 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:16,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:16,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:16,372 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash -653967976, now seen corresponding path program 1 times [2022-07-20 05:56:16,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:16,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864531082] [2022-07-20 05:56:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:16,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:16,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:16,375 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:16,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-07-20 05:56:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:56:16,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:16,527 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 05:56:16,629 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:16,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-20 05:56:16,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:56:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:56:16,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:56:17,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:17,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864531082] [2022-07-20 05:56:17,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864531082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:17,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:17,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-07-20 05:56:17,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030518357] [2022-07-20 05:56:17,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:56:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:56:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:56:17,130 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-20 05:56:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:17,388 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-07-20 05:56:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:56:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 57 [2022-07-20 05:56:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:17,389 INFO L225 Difference]: With dead ends: 95 [2022-07-20 05:56:17,389 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 05:56:17,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:56:17,389 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 82 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:17,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 248 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 187 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-07-20 05:56:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 05:56:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-20 05:56:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-07-20 05:56:17,391 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 57 [2022-07-20 05:56:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:17,392 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-07-20 05:56:17,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.384615384615385) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-20 05:56:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-07-20 05:56:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 05:56:17,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:17,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:17,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:17,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:17,600 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:17,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:17,601 INFO L85 PathProgramCache]: Analyzing trace with hash -472565031, now seen corresponding path program 1 times [2022-07-20 05:56:17,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:17,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520078752] [2022-07-20 05:56:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:17,602 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:17,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-07-20 05:56:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:56:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:17,813 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 05:56:18,012 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:18,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-20 05:56:18,164 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 05:56:18,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 05:56:18,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:56:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:56:18,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:18,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-07-20 05:56:18,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2022-07-20 05:56:19,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520078752] [2022-07-20 05:56:19,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520078752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1307359618] [2022-07-20 05:56:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:19,271 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:56:19,273 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:56:19,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-07-20 05:56:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 05:56:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:19,557 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 05:56:19,747 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:19,747 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 05:56:19,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:56:19,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:56:22,053 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 05:56:22,360 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 05:56:22,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-07-20 05:56:22,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-07-20 05:56:22,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-07-20 05:56:22,795 INFO L356 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-07-20 05:56:22,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 20 [2022-07-20 05:56:23,024 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:23,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:56:23,241 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 05:56:23,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 05:56:23,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:56:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:56:23,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:23,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-07-20 05:56:23,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2022-07-20 05:56:23,796 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:56:23,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-07-20 05:56:24,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1307359618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:24,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:24,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 42 [2022-07-20 05:56:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563392833] [2022-07-20 05:56:24,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:56:24,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:56:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2518, Unknown=1, NotChecked=0, Total=2756 [2022-07-20 05:56:24,143 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 05:56:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:34,079 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-07-20 05:56:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 05:56:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 58 [2022-07-20 05:56:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:34,080 INFO L225 Difference]: With dead ends: 94 [2022-07-20 05:56:34,080 INFO L226 Difference]: Without dead ends: 94 [2022-07-20 05:56:34,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=438, Invalid=4814, Unknown=4, NotChecked=0, Total=5256 [2022-07-20 05:56:34,082 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 149 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:34,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 614 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 861 Invalid, 0 Unknown, 249 Unchecked, 0.8s Time] [2022-07-20 05:56:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-20 05:56:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-20 05:56:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.051948051948052) internal successors, (81), 80 states have internal predecessors, (81), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-07-20 05:56:34,083 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 58 [2022-07-20 05:56:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:34,083 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-07-20 05:56:34,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.775) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 05:56:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-07-20 05:56:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 05:56:34,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:34,084 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:34,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-07-20 05:56:34,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:34,484 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1131542459, now seen corresponding path program 1 times [2022-07-20 05:56:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:34,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069525659] [2022-07-20 05:56:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:34,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:34,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:34,486 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:34,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-07-20 05:56:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:56:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:56:35,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:56:35,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:35,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069525659] [2022-07-20 05:56:35,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069525659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:35,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:35,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-20 05:56:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645344795] [2022-07-20 05:56:35,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:35,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:56:35,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:56:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:35,240 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:35,251 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-07-20 05:56:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:56:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 60 [2022-07-20 05:56:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:35,251 INFO L225 Difference]: With dead ends: 93 [2022-07-20 05:56:35,252 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 05:56:35,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:56:35,252 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:35,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 241 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-07-20 05:56:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 05:56:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-20 05:56:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 79 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-07-20 05:56:35,254 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 60 [2022-07-20 05:56:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:35,254 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-07-20 05:56:35,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:56:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-07-20 05:56:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 05:56:35,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:35,255 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:35,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-07-20 05:56:35,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:56:35,461 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash -388191190, now seen corresponding path program 1 times [2022-07-20 05:56:35,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:35,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659367680] [2022-07-20 05:56:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:35,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:35,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:35,462 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:35,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-07-20 05:56:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:56:35,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:35,611 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 05:56:35,654 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:35,654 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 05:56:35,744 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:35,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-20 05:56:36,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:56:36,044 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 05:56:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:56:36,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:36,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:36,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659367680] [2022-07-20 05:56:36,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659367680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:36,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1688866601] [2022-07-20 05:56:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:36,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:36,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:56:36,482 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:56:36,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-07-20 05:56:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 05:56:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:36,725 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 05:56:36,745 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:36,745 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 05:56:36,770 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:36,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:56:37,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:56:37,072 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 05:56:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:56:37,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:37,334 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:56:37,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-07-20 05:56:37,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1688866601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:37,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:37,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2022-07-20 05:56:37,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551635448] [2022-07-20 05:56:37,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:37,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:56:37,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:56:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:56:37,399 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:56:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:37,676 INFO L93 Difference]: Finished difference Result 99 states and 98 transitions. [2022-07-20 05:56:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:56:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-07-20 05:56:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:37,677 INFO L225 Difference]: With dead ends: 99 [2022-07-20 05:56:37,677 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 05:56:37,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:56:37,677 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:37,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 435 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-07-20 05:56:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 05:56:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-20 05:56:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 80 states have (on average 1.0375) internal successors, (83), 82 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-07-20 05:56:37,679 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 60 [2022-07-20 05:56:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:37,679 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-07-20 05:56:37,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:56:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-07-20 05:56:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 05:56:37,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:37,680 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:37,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:37,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-07-20 05:56:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:38,088 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 718077986, now seen corresponding path program 1 times [2022-07-20 05:56:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:38,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147312205] [2022-07-20 05:56:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:38,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:38,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:38,090 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:38,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-07-20 05:56:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 05:56:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:38,270 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 05:56:38,358 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:38,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-20 05:56:38,558 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:38,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2022-07-20 05:56:38,731 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 05:56:38,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 05:56:39,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-20 05:56:39,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-20 05:56:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:56:39,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:39,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-07-20 05:56:39,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 76 [2022-07-20 05:56:40,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:56:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147312205] [2022-07-20 05:56:40,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147312205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:40,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528802021] [2022-07-20 05:56:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:56:40,341 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:56:40,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-07-20 05:56:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 05:56:40,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:40,707 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 05:56:40,778 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:56:40,778 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 05:56:41,002 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:56:41,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2022-07-20 05:56:41,099 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 05:56:41,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 05:56:41,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-20 05:56:41,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-20 05:56:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:56:41,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:41,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-07-20 05:56:41,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 76 [2022-07-20 05:56:42,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528802021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:42,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:56:42,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 28 [2022-07-20 05:56:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212446282] [2022-07-20 05:56:42,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:42,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 05:56:42,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:56:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 05:56:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:56:42,125 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:56:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:43,266 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-07-20 05:56:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:56:43,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 61 [2022-07-20 05:56:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:43,267 INFO L225 Difference]: With dead ends: 95 [2022-07-20 05:56:43,267 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 05:56:43,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 128 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:56:43,269 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 211 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:43,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 386 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 597 Invalid, 0 Unknown, 127 Unchecked, 0.7s Time] [2022-07-20 05:56:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 05:56:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-20 05:56:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-20 05:56:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-07-20 05:56:43,277 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 61 [2022-07-20 05:56:43,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:43,278 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-07-20 05:56:43,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:56:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-07-20 05:56:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 05:56:43,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:43,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:56:43,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:43,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-07-20 05:56:43,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 05:56:43,687 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-07-20 05:56:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 610425485, now seen corresponding path program 1 times [2022-07-20 05:56:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:56:43,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134831844] [2022-07-20 05:56:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:43,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:56:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:56:43,689 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:56:43,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-07-20 05:56:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:56:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:44,651 INFO L356 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2022-07-20 05:56:44,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 161 treesize of output 176 [2022-07-20 05:57:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:57:06,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:07,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 05:57:07,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14