./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:25:38,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:25:38,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:25:38,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:25:38,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:25:38,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:25:38,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:25:38,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:25:38,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:25:38,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:25:38,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:25:38,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:25:38,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:25:38,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:25:38,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:25:38,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:25:38,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:25:38,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:25:38,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:25:38,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:25:38,956 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:25:38,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:25:38,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:25:38,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:25:38,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:25:38,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:25:38,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:25:38,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:25:38,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:25:38,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:25:38,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:25:38,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:25:38,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:25:38,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:25:38,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:25:38,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:25:38,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:25:38,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:25:38,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:25:38,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:25:38,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:25:38,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:25:38,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:25:39,003 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:25:39,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:25:39,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:25:39,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:25:39,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:25:39,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:25:39,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:25:39,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:25:39,006 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:25:39,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:25:39,007 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:25:39,007 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:25:39,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:25:39,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:25:39,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:25:39,007 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:25:39,008 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:25:39,008 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:25:39,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:25:39,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:25:39,008 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:25:39,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:25:39,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:25:39,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:25:39,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:25:39,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:25:39,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:25:39,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:25:39,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:25:39,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:25:39,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2022-07-21 17:25:39,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:25:39,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:25:39,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:25:39,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:25:39,299 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:25:39,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-07-21 17:25:39,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d967155/940d2e120e104a63b1ede21556ff5fa1/FLAG002f41049 [2022-07-21 17:25:39,781 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:25:39,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-07-21 17:25:39,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d967155/940d2e120e104a63b1ede21556ff5fa1/FLAG002f41049 [2022-07-21 17:25:39,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d967155/940d2e120e104a63b1ede21556ff5fa1 [2022-07-21 17:25:39,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:25:39,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:25:39,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:39,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:25:39,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:25:39,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:39" (1/1) ... [2022-07-21 17:25:39,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313504d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:39, skipping insertion in model container [2022-07-21 17:25:39,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:39" (1/1) ... [2022-07-21 17:25:39,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:25:39,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:25:40,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:40,224 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-21 17:25:40,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a59e0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:40, skipping insertion in model container [2022-07-21 17:25:40,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:40,225 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-21 17:25:40,227 INFO L158 Benchmark]: Toolchain (without parser) took 414.66ms. Allocated memory is still 56.6MB. Free memory was 39.2MB in the beginning and 35.8MB in the end (delta: 3.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 17:25:40,228 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 46.1MB. Free memory was 27.9MB in the beginning and 27.8MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:25:40,229 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.21ms. Allocated memory is still 56.6MB. Free memory was 39.0MB in the beginning and 35.8MB in the end (delta: 3.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 17:25:40,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 46.1MB. Free memory was 27.9MB in the beginning and 27.8MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 413.21ms. Allocated memory is still 56.6MB. Free memory was 39.0MB in the beginning and 35.8MB in the end (delta: 3.2MB). Peak memory consumption was 12.6MB. 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_test18_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:25:41,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:25:41,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:25:41,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:25:41,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:25:41,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:25:41,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:25:41,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:25:41,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:25:41,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:25:41,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:25:41,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:25:41,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:25:41,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:25:41,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:25:41,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:25:41,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:25:41,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:25:41,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:25:41,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:25:41,794 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:25:41,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:25:41,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:25:41,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:25:41,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:25:41,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:25:41,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:25:41,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:25:41,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:25:41,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:25:41,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:25:41,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:25:41,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:25:41,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:25:41,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:25:41,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:25:41,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:25:41,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:25:41,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:25:41,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:25:41,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:25:41,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:25:41,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:25:41,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:25:41,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:25:41,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:25:41,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:25:41,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:25:41,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:25:41,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:25:41,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:25:41,825 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:25:41,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:25:41,833 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:25:41,833 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:25:41,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:25:41,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:25:41,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:25:41,834 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:25:41,834 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:25:41,834 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:25:41,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:25:41,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:25:41,834 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:25:41,834 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:25:41,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:25:41,835 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:25:41,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:25:41,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:25:41,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:25:41,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:25:41,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:25:41,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:25:41,836 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:25:41,836 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:25:41,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:25:41,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2022-07-21 17:25:42,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:25:42,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:25:42,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:25:42,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:25:42,082 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:25:42,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-07-21 17:25:42,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85443df86/c7b1b80b4a26434280745946b3c6aae9/FLAG36f8d0111 [2022-07-21 17:25:42,529 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:25:42,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-07-21 17:25:42,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85443df86/c7b1b80b4a26434280745946b3c6aae9/FLAG36f8d0111 [2022-07-21 17:25:42,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85443df86/c7b1b80b4a26434280745946b3c6aae9 [2022-07-21 17:25:42,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:25:42,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:25:42,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:42,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:25:42,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:25:42,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:42" (1/1) ... [2022-07-21 17:25:42,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e3a5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:42, skipping insertion in model container [2022-07-21 17:25:42,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:42" (1/1) ... [2022-07-21 17:25:42,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:25:42,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:25:42,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:42,940 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 17:25:42,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:25:42,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:43,004 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:25:43,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:43,106 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:25:43,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43 WrapperNode [2022-07-21 17:25:43,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:43,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:25:43,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:25:43,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:25:43,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,144 INFO L137 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 54 [2022-07-21 17:25:43,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:25:43,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:25:43,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:25:43,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:25:43,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:25:43,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:25:43,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:25:43,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:25:43,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (1/1) ... [2022-07-21 17:25:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:25:43,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:25:43,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:25:43,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:25:43,263 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 17:25:43,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 17:25:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:25:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:25:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:25:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:25:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:25:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:25:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:25:43,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:25:43,343 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:25:43,344 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:25:43,528 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:25:43,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:25:43,532 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:25:43,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:25:43 BoogieIcfgContainer [2022-07-21 17:25:43,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:25:43,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:25:43,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:25:43,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:25:43,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:25:42" (1/3) ... [2022-07-21 17:25:43,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec84a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:25:43, skipping insertion in model container [2022-07-21 17:25:43,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:43" (2/3) ... [2022-07-21 17:25:43,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec84a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:25:43, skipping insertion in model container [2022-07-21 17:25:43,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:25:43" (3/3) ... [2022-07-21 17:25:43,539 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test18_2.i [2022-07-21 17:25:43,549 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:25:43,549 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-21 17:25:43,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:25:43,586 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@151c049e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@230c4c0d [2022-07-21 17:25:43,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-21 17:25:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:25:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:25:43,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:43,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:43,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1121226903, now seen corresponding path program 1 times [2022-07-21 17:25:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:43,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573541433] [2022-07-21 17:25:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:43,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:43,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:43,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:43,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:25:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:25:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:43,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:43,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:43,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573541433] [2022-07-21 17:25:43,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573541433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:43,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:43,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:25:43,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359095149] [2022-07-21 17:25:43,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:43,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:25:43,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:25:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:43,802 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-07-21 17:25:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:43,921 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-07-21 17:25:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:25:43,923 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 [2022-07-21 17:25:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:43,928 INFO L225 Difference]: With dead ends: 74 [2022-07-21 17:25:43,928 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 17:25:43,930 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 [2022-07-21 17:25:43,936 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 32 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 217 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 [2022-07-21 17:25:43,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 217 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 17:25:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2022-07-21 17:25:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:25:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-21 17:25:43,971 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11 [2022-07-21 17:25:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:43,972 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-21 17:25:43,973 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) [2022-07-21 17:25:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-21 17:25:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:25:43,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:43,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:43,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 17:25:44,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:44,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2008730584, now seen corresponding path program 1 times [2022-07-21 17:25:44,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:44,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454637720] [2022-07-21 17:25:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:44,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:44,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:44,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:44,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:25:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:25:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:44,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:44,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:44,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454637720] [2022-07-21 17:25:44,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454637720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:44,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:44,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:25:44,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457991496] [2022-07-21 17:25:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:44,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:25:44,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:25:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:25:44,277 INFO L87 Difference]: Start difference. First operand 42 states and 48 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) [2022-07-21 17:25:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:44,350 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-07-21 17:25:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:25:44,351 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 [2022-07-21 17:25:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:44,352 INFO L225 Difference]: With dead ends: 69 [2022-07-21 17:25:44,352 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 17:25:44,352 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 [2022-07-21 17:25:44,353 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:44,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 17:25:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2022-07-21 17:25:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.53125) internal successors, (49), 42 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 17:25:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-07-21 17:25:44,359 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 11 [2022-07-21 17:25:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:44,359 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-07-21 17:25:44,359 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) [2022-07-21 17:25:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-07-21 17:25:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:25:44,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:44,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:44,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:44,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:44,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash 398308128, now seen corresponding path program 1 times [2022-07-21 17:25:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:44,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109737050] [2022-07-21 17:25:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:44,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:44,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:44,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:44,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:25:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:44,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:25:44,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:44,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:44,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:44,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109737050] [2022-07-21 17:25:44,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109737050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:44,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:44,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:25:44,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632460468] [2022-07-21 17:25:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:44,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:25:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:25:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:25:44,634 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:25:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:44,670 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2022-07-21 17:25:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:25:44,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2022-07-21 17:25:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:44,672 INFO L225 Difference]: With dead ends: 83 [2022-07-21 17:25:44,672 INFO L226 Difference]: Without dead ends: 83 [2022-07-21 17:25:44,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:25:44,673 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:44,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 69 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:25:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-21 17:25:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2022-07-21 17:25:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 17:25:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-21 17:25:44,679 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 12 [2022-07-21 17:25:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:44,680 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-21 17:25:44,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:25:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-21 17:25:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:25:44,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:44,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:44,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:44,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:44,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011810, now seen corresponding path program 1 times [2022-07-21 17:25:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:44,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425416984] [2022-07-21 17:25:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:44,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:44,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:44,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:25:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:25:44,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:44,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:45,069 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:25:45,069 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 [2022-07-21 17:25:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:45,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:45,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:45,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425416984] [2022-07-21 17:25:45,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425416984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:45,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:45,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-21 17:25:45,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824309987] [2022-07-21 17:25:45,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:45,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:25:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:25:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:25:45,202 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-07-21 17:25:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:45,300 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-07-21 17:25:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:25:45,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 18 [2022-07-21 17:25:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:45,302 INFO L225 Difference]: With dead ends: 76 [2022-07-21 17:25:45,302 INFO L226 Difference]: Without dead ends: 76 [2022-07-21 17:25:45,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:25:45,302 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:45,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 133 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-21 17:25:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-21 17:25:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2022-07-21 17:25:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.52) internal successors, (76), 60 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 17:25:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2022-07-21 17:25:45,309 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 18 [2022-07-21 17:25:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:45,309 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2022-07-21 17:25:45,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-07-21 17:25:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2022-07-21 17:25:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:25:45,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:45,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:45,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:45,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:45,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011811, now seen corresponding path program 1 times [2022-07-21 17:25:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:45,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978966891] [2022-07-21 17:25:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:45,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:45,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:45,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:25:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:25:45,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:45,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:45,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:25:45,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:25:45,769 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:25:45,769 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 [2022-07-21 17:25:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:45,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:48,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978966891] [2022-07-21 17:25:48,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978966891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:25:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813439718] [2022-07-21 17:25:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:48,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:25:48,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:25:48,209 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) [2022-07-21 17:25:48,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-07-21 17:25:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:25:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:48,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:48,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:48,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:25:48,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:25:48,418 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:25:48,419 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 [2022-07-21 17:25:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:48,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:50,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [813439718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:25:50,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:50,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-21 17:25:50,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629503067] [2022-07-21 17:25:50,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:25:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:25:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=106, Unknown=1, NotChecked=0, Total=132 [2022-07-21 17:25:50,788 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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) [2022-07-21 17:25:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:51,194 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2022-07-21 17:25:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:25:51,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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 18 [2022-07-21 17:25:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:51,196 INFO L225 Difference]: With dead ends: 139 [2022-07-21 17:25:51,196 INFO L226 Difference]: Without dead ends: 139 [2022-07-21 17:25:51,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2022-07-21 17:25:51,197 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 67 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:51,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 382 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-07-21 17:25:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-21 17:25:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 84. [2022-07-21 17:25:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.546875) internal successors, (99), 74 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 17:25:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2022-07-21 17:25:51,203 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 18 [2022-07-21 17:25:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:51,203 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2022-07-21 17:25:51,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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) [2022-07-21 17:25:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2022-07-21 17:25:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:25:51,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:51,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:51,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:51,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-21 17:25:51,609 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 [2022-07-21 17:25:51,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash 881453185, now seen corresponding path program 1 times [2022-07-21 17:25:51,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:51,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128495249] [2022-07-21 17:25:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:51,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:51,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:51,613 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:51,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:25:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:25:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:51,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:51,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:51,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128495249] [2022-07-21 17:25:51,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128495249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:51,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:51,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:25:51,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084717311] [2022-07-21 17:25:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:51,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:25:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:25:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:51,724 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-07-21 17:25:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:51,781 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-07-21 17:25:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:25:51,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2022-07-21 17:25:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:51,783 INFO L225 Difference]: With dead ends: 68 [2022-07-21 17:25:51,783 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 17:25:51,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:51,784 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:51,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 17:25:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-07-21 17:25:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.553191489361702) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:25:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-07-21 17:25:51,796 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 18 [2022-07-21 17:25:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:51,796 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-07-21 17:25:51,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-07-21 17:25:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-07-21 17:25:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 17:25:51,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:51,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:51,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-21 17:25:52,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:52,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1478437295, now seen corresponding path program 1 times [2022-07-21 17:25:52,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:52,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222191974] [2022-07-21 17:25:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:52,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:52,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:52,008 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:52,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:25:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:25:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:25:52,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:52,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:52,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222191974] [2022-07-21 17:25:52,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222191974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:52,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:52,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:25:52,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943823129] [2022-07-21 17:25:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:52,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:25:52,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:25:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:52,072 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:25:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:52,105 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-07-21 17:25:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:25:52,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 20 [2022-07-21 17:25:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:52,106 INFO L225 Difference]: With dead ends: 79 [2022-07-21 17:25:52,106 INFO L226 Difference]: Without dead ends: 79 [2022-07-21 17:25:52,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:25:52,106 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:52,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:25:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-21 17:25:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-07-21 17:25:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5) internal successors, (78), 60 states have internal predecessors, (78), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 17:25:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2022-07-21 17:25:52,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 20 [2022-07-21 17:25:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:52,110 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2022-07-21 17:25:52,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:25:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2022-07-21 17:25:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 17:25:52,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:52,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:52,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:52,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:52,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1073719666, now seen corresponding path program 1 times [2022-07-21 17:25:52,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:52,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278085944] [2022-07-21 17:25:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:52,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:52,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:52,321 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:52,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:25:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:25:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:25:52,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:52,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278085944] [2022-07-21 17:25:52,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278085944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:52,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:52,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:25:52,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108133594] [2022-07-21 17:25:52,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:52,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:25:52,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:52,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:25:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:25:52,442 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:25:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:52,499 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-07-21 17:25:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:25:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-21 17:25:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:52,500 INFO L225 Difference]: With dead ends: 67 [2022-07-21 17:25:52,500 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 17:25:52,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:52,501 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 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 [2022-07-21 17:25:52,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:25:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 17:25:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-07-21 17:25:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 52 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 17:25:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-21 17:25:52,504 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 20 [2022-07-21 17:25:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:52,504 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-21 17:25:52,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:25:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-21 17:25:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 17:25:52,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:52,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:52,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:52,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1074427268, now seen corresponding path program 1 times [2022-07-21 17:25:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:52,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520283976] [2022-07-21 17:25:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:52,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:52,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:52,710 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:52,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:25:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:52,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:25:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:52,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:25:53,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:53,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520283976] [2022-07-21 17:25:53,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520283976] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:53,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:53,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-21 17:25:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181382191] [2022-07-21 17:25:53,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:25:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:25:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:25:53,012 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-07-21 17:25:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:53,093 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-07-21 17:25:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:25:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 21 [2022-07-21 17:25:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:53,094 INFO L225 Difference]: With dead ends: 59 [2022-07-21 17:25:53,094 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 17:25:53,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:25:53,095 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:53,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-07-21 17:25:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 17:25:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-21 17:25:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 17:25:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-07-21 17:25:53,098 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 21 [2022-07-21 17:25:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:53,098 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-07-21 17:25:53,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-07-21 17:25:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-07-21 17:25:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:25:53,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:53,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:53,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:53,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:53,310 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash -807401739, now seen corresponding path program 1 times [2022-07-21 17:25:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:53,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937141731] [2022-07-21 17:25:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:53,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:53,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:53,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:53,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:25:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:25:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:25:53,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:25:53,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937141731] [2022-07-21 17:25:53,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937141731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:53,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:53,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 17:25:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952022913] [2022-07-21 17:25:53,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:53,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:25:53,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:53,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:25:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:25:53,464 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:25:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:53,577 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2022-07-21 17:25:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:25:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-07-21 17:25:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:53,578 INFO L225 Difference]: With dead ends: 137 [2022-07-21 17:25:53,578 INFO L226 Difference]: Without dead ends: 137 [2022-07-21 17:25:53,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:25:53,579 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 247 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:53,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 153 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-21 17:25:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 77. [2022-07-21 17:25:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:25:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-07-21 17:25:53,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 22 [2022-07-21 17:25:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:53,588 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-07-21 17:25:53,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:25:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-07-21 17:25:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 17:25:53,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:53,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:53,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:53,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:25:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2128418719, now seen corresponding path program 1 times [2022-07-21 17:25:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:53,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943323317] [2022-07-21 17:25:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:53,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:53,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:53,798 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:53,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:25:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:25:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:25:54,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:58,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:58,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943323317] [2022-07-21 17:25:58,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943323317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:25:58,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806705486] [2022-07-21 17:25:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:58,175 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:25:58,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:25:58,176 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) [2022-07-21 17:25:58,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-21 17:25:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:25:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:25:58,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:02,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1806705486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:02,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:02,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-21 17:26:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751830129] [2022-07-21 17:26:02,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:02,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:26:02,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:26:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-21 17:26:02,559 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-21 17:26:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:02,635 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-07-21 17:26:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:26:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 24 [2022-07-21 17:26:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:02,636 INFO L225 Difference]: With dead ends: 82 [2022-07-21 17:26:02,636 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 17:26:02,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-21 17:26:02,637 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:02,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 249 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-07-21 17:26:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 17:26:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-07-21 17:26:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 61 states have internal predecessors, (74), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:26:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-07-21 17:26:02,640 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 24 [2022-07-21 17:26:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:02,640 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-07-21 17:26:02,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-21 17:26:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-07-21 17:26:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:26:02,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:02,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:02,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:02,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:03,047 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 [2022-07-21 17:26:03,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1844216072, now seen corresponding path program 1 times [2022-07-21 17:26:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:03,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438646221] [2022-07-21 17:26:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:03,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:03,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:03,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:03,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:26:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:03,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:26:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:03,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:03,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:03,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:03,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:03,294 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:03,294 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 [2022-07-21 17:26:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:03,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:03,452 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:03,452 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 [2022-07-21 17:26:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:26:03,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:05,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:05,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438646221] [2022-07-21 17:26:05,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438646221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:05,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [798241015] [2022-07-21 17:26:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:05,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:05,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:26:05,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:26:05,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-07-21 17:26:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:26:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:06,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:06,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:06,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:06,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:06,278 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:06,278 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 [2022-07-21 17:26:06,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:06,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:06,386 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:06,386 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 [2022-07-21 17:26:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:26:06,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:08,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [798241015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:08,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:08,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-07-21 17:26:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009802369] [2022-07-21 17:26:08,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:08,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:26:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:26:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2022-07-21 17:26:08,827 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:26:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:09,126 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-07-21 17:26:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:26:09,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-07-21 17:26:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:09,127 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:26:09,127 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:26:09,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=42, Invalid=197, Unknown=1, NotChecked=0, Total=240 [2022-07-21 17:26:09,127 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:09,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 234 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 246 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-21 17:26:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:26:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2022-07-21 17:26:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.393939393939394) internal successors, (92), 72 states have internal predecessors, (92), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:26:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2022-07-21 17:26:09,130 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 28 [2022-07-21 17:26:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:09,130 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2022-07-21 17:26:09,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:26:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2022-07-21 17:26:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:26:09,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:09,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:09,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:09,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:09,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:09,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:09,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1022360221, now seen corresponding path program 1 times [2022-07-21 17:26:09,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:09,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676920824] [2022-07-21 17:26:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:09,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:09,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:09,545 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:09,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:26:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:26:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:26:09,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:10,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-21 17:26:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:26:10,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676920824] [2022-07-21 17:26:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676920824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:10,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:10,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-21 17:26:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663476024] [2022-07-21 17:26:10,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:10,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:26:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:26:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:26:10,638 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 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) [2022-07-21 17:26:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:12,477 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2022-07-21 17:26:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:26:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 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 30 [2022-07-21 17:26:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:12,479 INFO L225 Difference]: With dead ends: 154 [2022-07-21 17:26:12,479 INFO L226 Difference]: Without dead ends: 154 [2022-07-21 17:26:12,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:26:12,480 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 200 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:12,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 253 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 308 Invalid, 0 Unknown, 51 Unchecked, 1.0s Time] [2022-07-21 17:26:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-21 17:26:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 86. [2022-07-21 17:26:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 74 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:26:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-07-21 17:26:12,483 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 30 [2022-07-21 17:26:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:12,483 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-07-21 17:26:12,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 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) [2022-07-21 17:26:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-07-21 17:26:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:26:12,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:12,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:12,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:12,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:12,689 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1628395789, now seen corresponding path program 1 times [2022-07-21 17:26:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:12,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899404140] [2022-07-21 17:26:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:12,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:12,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:12,691 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:12,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 17:26:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:26:12,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:12,822 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 15 treesize of output 11 [2022-07-21 17:26:12,949 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 [2022-07-21 17:26:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:26:12,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:26:13,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899404140] [2022-07-21 17:26:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899404140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:13,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:13,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-07-21 17:26:13,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694359965] [2022-07-21 17:26:13,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:13,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:26:13,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:26:13,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:26:13,123 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:13,762 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-07-21 17:26:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:26:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-07-21 17:26:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:13,763 INFO L225 Difference]: With dead ends: 108 [2022-07-21 17:26:13,763 INFO L226 Difference]: Without dead ends: 108 [2022-07-21 17:26:13,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:26:13,764 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:13,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 269 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 355 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-07-21 17:26:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-21 17:26:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-21 17:26:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:26:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-07-21 17:26:13,766 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 31 [2022-07-21 17:26:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:13,767 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-07-21 17:26:13,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-07-21 17:26:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:26:13,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:13,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:13,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:13,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:13,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1059338178, now seen corresponding path program 1 times [2022-07-21 17:26:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:13,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702506428] [2022-07-21 17:26:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:13,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:13,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:13,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 17:26:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:26:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:14,390 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 15 treesize of output 11 [2022-07-21 17:26:14,716 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 [2022-07-21 17:26:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:26:14,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:26:15,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702506428] [2022-07-21 17:26:15,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702506428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:15,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:15,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2022-07-21 17:26:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300448406] [2022-07-21 17:26:15,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:15,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:26:15,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:26:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:26:15,055 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:15,250 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2022-07-21 17:26:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:26:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-07-21 17:26:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:15,253 INFO L225 Difference]: With dead ends: 144 [2022-07-21 17:26:15,253 INFO L226 Difference]: Without dead ends: 144 [2022-07-21 17:26:15,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:26:15,254 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:15,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 193 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-07-21 17:26:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-21 17:26:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2022-07-21 17:26:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 117 states have internal predecessors, (142), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 17:26:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 165 transitions. [2022-07-21 17:26:15,257 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 165 transitions. Word has length 32 [2022-07-21 17:26:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:15,257 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 165 transitions. [2022-07-21 17:26:15,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 165 transitions. [2022-07-21 17:26:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:26:15,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:15,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:15,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:15,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:15,467 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash 650513953, now seen corresponding path program 2 times [2022-07-21 17:26:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751942335] [2022-07-21 17:26:15,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:26:15,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:15,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:15,470 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:15,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 17:26:15,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:26:15,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:26:15,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:26:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:26:15,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:26:15,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:15,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751942335] [2022-07-21 17:26:15,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751942335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:26:15,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:26:15,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:26:15,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141142209] [2022-07-21 17:26:15,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:26:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:26:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:26:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:26:15,585 INFO L87 Difference]: Start difference. First operand 135 states and 165 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-07-21 17:26:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:15,611 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2022-07-21 17:26:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:26:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 32 [2022-07-21 17:26:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:15,612 INFO L225 Difference]: With dead ends: 103 [2022-07-21 17:26:15,612 INFO L226 Difference]: Without dead ends: 99 [2022-07-21 17:26:15,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:26:15,613 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 134 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 [2022-07-21 17:26:15,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 134 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:26:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-21 17:26:15,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-07-21 17:26:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 82 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2022-07-21 17:26:15,615 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 32 [2022-07-21 17:26:15,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:15,615 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2022-07-21 17:26:15,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-07-21 17:26:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2022-07-21 17:26:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 17:26:15,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:15,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:15,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:15,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:15,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:15,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1520254763, now seen corresponding path program 1 times [2022-07-21 17:26:15,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:15,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481404940] [2022-07-21 17:26:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:15,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:15,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:15,828 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) [2022-07-21 17:26:15,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 17:26:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:26:15,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:15,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:15,957 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 15 treesize of output 11 [2022-07-21 17:26:16,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-21 17:26:16,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:26:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:26:16,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:26:16,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481404940] [2022-07-21 17:26:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481404940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:16,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:16,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-07-21 17:26:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606777152] [2022-07-21 17:26:16,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:16,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:26:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:26:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:26:16,421 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:17,067 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-21 17:26:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:26:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2022-07-21 17:26:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:17,068 INFO L225 Difference]: With dead ends: 100 [2022-07-21 17:26:17,068 INFO L226 Difference]: Without dead ends: 100 [2022-07-21 17:26:17,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:26:17,070 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 46 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:17,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 252 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 393 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-07-21 17:26:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-21 17:26:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-21 17:26:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 84 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2022-07-21 17:26:17,083 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 33 [2022-07-21 17:26:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:17,083 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2022-07-21 17:26:17,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2022-07-21 17:26:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:26:17,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:17,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:17,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:17,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:17,296 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 520579815, now seen corresponding path program 1 times [2022-07-21 17:26:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:17,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478244684] [2022-07-21 17:26:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:17,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:17,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:17,298 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:17,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 17:26:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:26:17,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:26:17,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:26:17,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478244684] [2022-07-21 17:26:17,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478244684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:17,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:17,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 17:26:17,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823997762] [2022-07-21 17:26:17,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:17,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:26:17,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:26:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:26:17,495 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:26:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:17,622 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-07-21 17:26:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:26:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-07-21 17:26:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:17,623 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:26:17,623 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:26:17,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:26:17,623 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:17,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 231 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:26:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:26:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-07-21 17:26:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 80 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-21 17:26:17,626 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 36 [2022-07-21 17:26:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:17,626 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-21 17:26:17,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:26:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-21 17:26:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 17:26:17,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:17,626 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:17,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:17,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:17,833 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:17,834 INFO L85 PathProgramCache]: Analyzing trace with hash -159020851, now seen corresponding path program 2 times [2022-07-21 17:26:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:17,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311888206] [2022-07-21 17:26:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:26:17,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:17,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:17,836 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) [2022-07-21 17:26:17,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 17:26:17,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:26:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:26:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 17:26:17,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:17,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:17,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:20,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:20,069 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:20,069 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 [2022-07-21 17:26:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:20,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:20,202 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:20,202 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 [2022-07-21 17:26:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:20,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:20,349 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:20,349 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 [2022-07-21 17:26:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:26:20,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:23,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:23,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311888206] [2022-07-21 17:26:23,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311888206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:23,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1907914428] [2022-07-21 17:26:23,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:26:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:26:23,341 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) [2022-07-21 17:26:23,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-21 17:26:23,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:26:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:26:23,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 17:26:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:23,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:23,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:23,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:23,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:23,588 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:23,589 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 [2022-07-21 17:26:25,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:25,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:25,708 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:25,709 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 [2022-07-21 17:26:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:25,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:26:25,832 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:25,832 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 [2022-07-21 17:26:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:26:25,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1907914428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:28,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:28,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-07-21 17:26:28,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146804163] [2022-07-21 17:26:28,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:28,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:26:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:28,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:26:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=197, Unknown=2, NotChecked=0, Total=240 [2022-07-21 17:26:28,337 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:26:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:28,793 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2022-07-21 17:26:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:26:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 2 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 38 [2022-07-21 17:26:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:28,794 INFO L225 Difference]: With dead ends: 127 [2022-07-21 17:26:28,794 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 17:26:28,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=50, Invalid=254, Unknown=2, NotChecked=0, Total=306 [2022-07-21 17:26:28,795 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:28,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 325 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 362 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-07-21 17:26:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 17:26:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2022-07-21 17:26:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 94 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2022-07-21 17:26:28,797 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 38 [2022-07-21 17:26:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:28,797 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2022-07-21 17:26:28,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:26:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2022-07-21 17:26:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 17:26:28,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:28,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:28,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:29,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:29,201 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 [2022-07-21 17:26:29,202 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2060951864, now seen corresponding path program 1 times [2022-07-21 17:26:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59863051] [2022-07-21 17:26:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:29,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:29,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:29,203 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:29,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:26:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:26:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:29,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:29,462 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:26:29,462 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 [2022-07-21 17:26:29,530 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 15 treesize of output 11 [2022-07-21 17:26:29,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-21 17:26:35,746 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 16 treesize of output 8 [2022-07-21 17:26:35,779 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 [2022-07-21 17:26:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:26:35,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:26:36,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59863051] [2022-07-21 17:26:36,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59863051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:36,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:36,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2022-07-21 17:26:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399580203] [2022-07-21 17:26:36,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:36,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:26:36,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:26:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=522, Unknown=2, NotChecked=0, Total=600 [2022-07-21 17:26:36,366 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:37,457 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2022-07-21 17:26:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:26:37,458 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 5 states have call successors, (5), 5 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 38 [2022-07-21 17:26:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:37,459 INFO L225 Difference]: With dead ends: 135 [2022-07-21 17:26:37,459 INFO L226 Difference]: Without dead ends: 135 [2022-07-21 17:26:37,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=158, Invalid=1172, Unknown=2, NotChecked=0, Total=1332 [2022-07-21 17:26:37,460 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:37,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 237 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 468 Invalid, 0 Unknown, 162 Unchecked, 0.5s Time] [2022-07-21 17:26:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-21 17:26:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-07-21 17:26:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 100 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2022-07-21 17:26:37,462 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 38 [2022-07-21 17:26:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:37,462 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2022-07-21 17:26:37,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2022-07-21 17:26:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 17:26:37,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:37,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:37,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:37,670 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:26:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash 594821051, now seen corresponding path program 1 times [2022-07-21 17:26:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:37,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139907274] [2022-07-21 17:26:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:37,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:37,672 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:37,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:26:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:26:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:37,975 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 15 treesize of output 11 [2022-07-21 17:26:38,088 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-21 17:26:38,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2022-07-21 17:26:38,215 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 34 treesize of output 22 [2022-07-21 17:26:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:26:40,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:55,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139907274] [2022-07-21 17:26:55,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139907274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1943928527] [2022-07-21 17:26:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:55,407 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:55,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:26:55,408 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:26:55,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-07-21 17:26:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 17:26:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:58,269 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 15 treesize of output 11 [2022-07-21 17:26:58,480 INFO L356 Elim1Store]: treesize reduction 19, result has 24.0 percent of original size [2022-07-21 17:26:58,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2022-07-21 17:26:58,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-21 17:27:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:27:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:11,581 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 21 treesize of output 19 [2022-07-21 17:27:16,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1943928527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:27:16,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:16,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2022-07-21 17:27:16,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381115243] [2022-07-21 17:27:16,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:16,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 17:27:16,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 17:27:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2147, Unknown=11, NotChecked=0, Total=2352 [2022-07-21 17:27:16,451 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand has 30 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:27:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:27:16,469 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2022-07-21 17:27:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:27:16,469 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-07-21 17:27:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:27:16,470 INFO L225 Difference]: With dead ends: 118 [2022-07-21 17:27:16,470 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:27:16,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=194, Invalid=2147, Unknown=11, NotChecked=0, Total=2352 [2022-07-21 17:27:16,471 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:27:16,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 256 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 202 Unchecked, 0.0s Time] [2022-07-21 17:27:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:27:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-07-21 17:27:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 89 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 17:27:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2022-07-21 17:27:16,480 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 40 [2022-07-21 17:27:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:27:16,480 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2022-07-21 17:27:16,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:27:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2022-07-21 17:27:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 17:27:16,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:27:16,481 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:27:16,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-07-21 17:27:16,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:27:16,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:27:16,883 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:27:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:27:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash -419710261, now seen corresponding path program 1 times [2022-07-21 17:27:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:27:16,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213166390] [2022-07-21 17:27:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:27:16,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:27:16,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:27:16,886 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:27:16,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:27:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:27:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:27:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 17:27:17,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 17:27:17,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:17,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213166390] [2022-07-21 17:27:17,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213166390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:27:17,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:17,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 17:27:17,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467439509] [2022-07-21 17:27:17,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:17,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:27:17,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:27:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:27:17,101 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:27:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:27:17,331 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-07-21 17:27:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:27:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 44 [2022-07-21 17:27:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:27:17,332 INFO L225 Difference]: With dead ends: 114 [2022-07-21 17:27:17,332 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 17:27:17,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:27:17,333 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 175 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:27:17,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 218 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:27:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 17:27:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2022-07-21 17:27:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 88 states have internal predecessors, (102), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 17:27:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2022-07-21 17:27:17,335 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 44 [2022-07-21 17:27:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:27:17,335 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2022-07-21 17:27:17,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:27:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2022-07-21 17:27:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 17:27:17,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:27:17,336 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:27:17,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-21 17:27:17,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:27:17,543 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:27:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:27:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1236217923, now seen corresponding path program 1 times [2022-07-21 17:27:17,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:27:17,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974590488] [2022-07-21 17:27:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:27:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:27:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:27:17,548 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:27:17,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 17:27:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:27:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:27:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 17:27:17,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:18,066 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 34 treesize of output 30 [2022-07-21 17:27:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 17:27:19,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:19,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974590488] [2022-07-21 17:27:19,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974590488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:27:19,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:19,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-21 17:27:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859612964] [2022-07-21 17:27:19,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:19,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:27:19,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:27:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:27:19,356 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:27:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:27:25,214 INFO L93 Difference]: Finished difference Result 208 states and 217 transitions. [2022-07-21 17:27:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:27:25,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-07-21 17:27:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:27:25,216 INFO L225 Difference]: With dead ends: 208 [2022-07-21 17:27:25,216 INFO L226 Difference]: Without dead ends: 208 [2022-07-21 17:27:25,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:27:25,217 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 422 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:27:25,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 352 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-21 17:27:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-21 17:27:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 100. [2022-07-21 17:27:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 17:27:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2022-07-21 17:27:25,220 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 46 [2022-07-21 17:27:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:27:25,220 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2022-07-21 17:27:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:27:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2022-07-21 17:27:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:27:25,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:27:25,222 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:27:25,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:27:25,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:27:25,423 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:27:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:27:25,424 INFO L85 PathProgramCache]: Analyzing trace with hash -519500702, now seen corresponding path program 3 times [2022-07-21 17:27:25,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:27:25,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138759556] [2022-07-21 17:27:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:27:25,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:27:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:27:25,425 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:27:25,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:27:25,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:27:25,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:27:25,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:27:25,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:25,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:27:29,747 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:27:29,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 17:27:36,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:36,139 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-21 17:27:36,140 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 21 treesize of output 30 [2022-07-21 17:27:36,153 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:36,153 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 [2022-07-21 17:27:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:36,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:27:36,600 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:36,601 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 [2022-07-21 17:27:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:36,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:27:36,846 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:36,847 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 [2022-07-21 17:27:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:27:36,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:39,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:39,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138759556] [2022-07-21 17:27:39,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138759556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:27:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926996129] [2022-07-21 17:27:39,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:27:39,816 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:27:39,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:27:39,817 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:27:39,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-21 17:27:40,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:27:40,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:27:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 17:27:40,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:40,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:27:40,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:27:40,286 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:40,287 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 [2022-07-21 17:27:40,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:27:40,610 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:40,610 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 [2022-07-21 17:27:40,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:27:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:40,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:27:40,933 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:40,933 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 [2022-07-21 17:27:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:43,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:27:43,099 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:43,100 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 [2022-07-21 17:27:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 17:27:43,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:45,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926996129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:27:45,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:45,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 29 [2022-07-21 17:27:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372060910] [2022-07-21 17:27:45,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:45,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 17:27:45,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 17:27:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=886, Unknown=6, NotChecked=0, Total=992 [2022-07-21 17:27:45,879 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 30 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:27:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:27:50,866 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2022-07-21 17:27:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:27:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2022-07-21 17:27:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:27:50,867 INFO L225 Difference]: With dead ends: 148 [2022-07-21 17:27:50,867 INFO L226 Difference]: Without dead ends: 148 [2022-07-21 17:27:50,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=150, Invalid=1324, Unknown=8, NotChecked=0, Total=1482 [2022-07-21 17:27:50,868 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 73 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:27:50,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 658 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 698 Invalid, 0 Unknown, 298 Unchecked, 0.6s Time] [2022-07-21 17:27:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-21 17:27:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 115. [2022-07-21 17:27:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 101 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 17:27:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2022-07-21 17:27:50,870 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 48 [2022-07-21 17:27:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:27:50,870 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2022-07-21 17:27:50,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:27:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2022-07-21 17:27:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:27:50,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:27:50,871 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:27:50,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:27:51,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:27:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:27:51,275 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:27:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:27:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash 331950041, now seen corresponding path program 1 times [2022-07-21 17:27:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:27:51,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499001398] [2022-07-21 17:27:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:27:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:27:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:27:51,277 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:27:51,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:27:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:27:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:27:51,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:51,465 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 15 treesize of output 11 [2022-07-21 17:27:51,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:51,604 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 23 treesize of output 22 [2022-07-21 17:27:51,834 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 [2022-07-21 17:27:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:27:51,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 17:27:52,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499001398] [2022-07-21 17:27:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499001398] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:27:52,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:52,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-07-21 17:27:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026196532] [2022-07-21 17:27:52,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:52,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:27:52,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:52,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:27:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:27:52,221 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:27:54,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:27:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:27:55,129 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-07-21 17:27:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 17:27:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2022-07-21 17:27:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:27:55,131 INFO L225 Difference]: With dead ends: 142 [2022-07-21 17:27:55,131 INFO L226 Difference]: Without dead ends: 142 [2022-07-21 17:27:55,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:27:55,132 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 190 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:27:55,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 360 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 537 Invalid, 0 Unknown, 48 Unchecked, 2.1s Time] [2022-07-21 17:27:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-21 17:27:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2022-07-21 17:27:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 108 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 17:27:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2022-07-21 17:27:55,140 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 47 [2022-07-21 17:27:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:27:55,140 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2022-07-21 17:27:55,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:27:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2022-07-21 17:27:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:27:55,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:27:55,141 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:27:55,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:27:55,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:27:55,353 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:27:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:27:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1700516764, now seen corresponding path program 1 times [2022-07-21 17:27:55,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:27:55,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403977714] [2022-07-21 17:27:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:27:55,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:27:55,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:27:55,356 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:27:55,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:27:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:27:55,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:27:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:55,554 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 15 treesize of output 11 [2022-07-21 17:27:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:55,704 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 28 treesize of output 27 [2022-07-21 17:27:55,975 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 [2022-07-21 17:27:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:27:56,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 17:27:56,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:56,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403977714] [2022-07-21 17:27:56,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403977714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:27:56,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:56,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2022-07-21 17:27:56,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794909778] [2022-07-21 17:27:56,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:56,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:27:56,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:27:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:27:56,471 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:28:00,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:28:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:01,366 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2022-07-21 17:28:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:28:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-07-21 17:28:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:01,367 INFO L225 Difference]: With dead ends: 158 [2022-07-21 17:28:01,367 INFO L226 Difference]: Without dead ends: 158 [2022-07-21 17:28:01,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:28:01,368 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 222 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:01,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 300 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 740 Invalid, 1 Unknown, 65 Unchecked, 3.2s Time] [2022-07-21 17:28:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-21 17:28:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2022-07-21 17:28:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.203883495145631) internal successors, (124), 110 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 17:28:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2022-07-21 17:28:01,371 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 48 [2022-07-21 17:28:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:01,371 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2022-07-21 17:28:01,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:28:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2022-07-21 17:28:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:28:01,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:01,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:01,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-21 17:28:01,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:01,572 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:28:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1176412219, now seen corresponding path program 1 times [2022-07-21 17:28:01,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:01,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858980199] [2022-07-21 17:28:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:01,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:01,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:01,574 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:01,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 17:28:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:28:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:01,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:01,797 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 15 treesize of output 11 [2022-07-21 17:28:01,860 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 9 treesize of output 3 [2022-07-21 17:28:01,938 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-21 17:28:01,938 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 22 treesize of output 33 [2022-07-21 17:28:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:02,008 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 35 treesize of output 30 [2022-07-21 17:28:02,083 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 11 treesize of output 5 [2022-07-21 17:28:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:02,340 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 26 treesize of output 28 [2022-07-21 17:28:02,407 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:28:02,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-07-21 17:28:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:28:02,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:03,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:03,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858980199] [2022-07-21 17:28:03,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858980199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:28:03,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1591595256] [2022-07-21 17:28:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:03,011 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:28:03,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:28:03,012 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) [2022-07-21 17:28:03,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-21 17:28:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:03,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 17:28:03,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:03,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:03,280 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 15 treesize of output 11 [2022-07-21 17:28:03,333 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 9 treesize of output 3 [2022-07-21 17:28:03,400 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-21 17:28:03,400 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 22 treesize of output 33 [2022-07-21 17:28:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:03,442 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 35 treesize of output 30 [2022-07-21 17:28:03,524 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 11 treesize of output 5 [2022-07-21 17:28:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:03,739 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 26 treesize of output 28 [2022-07-21 17:28:03,815 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:28:03,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-07-21 17:28:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:28:03,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:04,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1591595256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:28:04,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:04,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2022-07-21 17:28:04,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58074061] [2022-07-21 17:28:04,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:04,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:28:04,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:04,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:28:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:28:04,069 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 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) [2022-07-21 17:28:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:04,897 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2022-07-21 17:28:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:28:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 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 49 [2022-07-21 17:28:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:04,898 INFO L225 Difference]: With dead ends: 129 [2022-07-21 17:28:04,898 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 17:28:04,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 17:28:04,899 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:04,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 344 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 505 Invalid, 0 Unknown, 135 Unchecked, 0.6s Time] [2022-07-21 17:28:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 17:28:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-21 17:28:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 114 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 17:28:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2022-07-21 17:28:04,902 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 49 [2022-07-21 17:28:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:04,903 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2022-07-21 17:28:04,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 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) [2022-07-21 17:28:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2022-07-21 17:28:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:28:04,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:04,903 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:04,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:05,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:05,304 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 [2022-07-21 17:28:05,304 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:28:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -486793996, now seen corresponding path program 2 times [2022-07-21 17:28:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:05,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62435265] [2022-07-21 17:28:05,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:28:05,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:05,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:05,306 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:05,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 17:28:05,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:28:05,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:28:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 17:28:05,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 17:28:05,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:05,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62435265] [2022-07-21 17:28:05,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62435265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:05,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:05,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 17:28:05,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002138753] [2022-07-21 17:28:05,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:05,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:28:05,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:28:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:28:05,784 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:28:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:06,405 INFO L93 Difference]: Finished difference Result 375 states and 402 transitions. [2022-07-21 17:28:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:28:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 52 [2022-07-21 17:28:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:06,407 INFO L225 Difference]: With dead ends: 375 [2022-07-21 17:28:06,407 INFO L226 Difference]: Without dead ends: 375 [2022-07-21 17:28:06,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:28:06,408 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 978 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:06,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 532 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:28:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-21 17:28:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 161. [2022-07-21 17:28:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 141 states have internal predecessors, (160), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-21 17:28:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2022-07-21 17:28:06,412 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 52 [2022-07-21 17:28:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:06,412 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2022-07-21 17:28:06,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:28:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2022-07-21 17:28:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:28:06,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:06,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:06,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:06,622 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:28:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash -436631103, now seen corresponding path program 2 times [2022-07-21 17:28:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:06,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809828210] [2022-07-21 17:28:06,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:28:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:06,636 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:06,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 17:28:06,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:28:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:06,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:28:06,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 17:28:06,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 17:28:07,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809828210] [2022-07-21 17:28:07,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809828210] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:07,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:07,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 17:28:07,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758604050] [2022-07-21 17:28:07,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:07,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:28:07,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:07,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:28:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:28:07,032 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:28:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:07,232 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2022-07-21 17:28:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:28:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2022-07-21 17:28:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:07,234 INFO L225 Difference]: With dead ends: 173 [2022-07-21 17:28:07,234 INFO L226 Difference]: Without dead ends: 173 [2022-07-21 17:28:07,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:28:07,234 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 40 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:07,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 384 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:28:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-21 17:28:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 163. [2022-07-21 17:28:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 143 states have internal predecessors, (162), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-21 17:28:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2022-07-21 17:28:07,238 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 52 [2022-07-21 17:28:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:07,239 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2022-07-21 17:28:07,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:28:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2022-07-21 17:28:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:28:07,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:07,239 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:07,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:07,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:07,447 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:28:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:07,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1304261010, now seen corresponding path program 2 times [2022-07-21 17:28:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556270642] [2022-07-21 17:28:07,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:28:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:07,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:07,473 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:07,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-21 17:28:07,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:28:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:07,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:28:07,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:07,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:07,652 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:07,653 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 [2022-07-21 17:28:07,696 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 15 treesize of output 11 [2022-07-21 17:28:09,767 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_65| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_65|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60|))) is different from true [2022-07-21 17:28:09,826 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-21 17:28:09,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-21 17:28:11,863 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_66| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_66|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61|))) is different from true [2022-07-21 17:28:12,050 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 [2022-07-21 17:28:12,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-07-21 17:28:12,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:12,238 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 40 treesize of output 36 [2022-07-21 17:28:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:28:12,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556270642] [2022-07-21 17:28:12,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556270642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:12,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:12,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-07-21 17:28:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025410129] [2022-07-21 17:28:12,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:12,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 17:28:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 17:28:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=588, Unknown=2, NotChecked=98, Total=756 [2022-07-21 17:28:12,833 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand has 28 states, 27 states have (on average 3.0) internal successors, (81), 25 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:28:27,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:28:30,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:28:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:31,658 INFO L93 Difference]: Finished difference Result 185 states and 218 transitions. [2022-07-21 17:28:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 17:28:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.0) internal successors, (81), 25 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2022-07-21 17:28:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:31,660 INFO L225 Difference]: With dead ends: 185 [2022-07-21 17:28:31,660 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 17:28:31,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=268, Invalid=2492, Unknown=4, NotChecked=206, Total=2970 [2022-07-21 17:28:31,661 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:31,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 440 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 962 Invalid, 2 Unknown, 274 Unchecked, 5.1s Time] [2022-07-21 17:28:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 17:28:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 169. [2022-07-21 17:28:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.2112676056338028) internal successors, (172), 149 states have internal predecessors, (172), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-21 17:28:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2022-07-21 17:28:31,665 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 54 [2022-07-21 17:28:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:31,665 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2022-07-21 17:28:31,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.0) internal successors, (81), 25 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:28:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2022-07-21 17:28:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 17:28:31,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:31,665 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:31,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:31,866 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:28:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:31,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1952504247, now seen corresponding path program 4 times [2022-07-21 17:28:31,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:31,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420888098] [2022-07-21 17:28:31,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:28:31,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:31,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:31,868 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) [2022-07-21 17:28:31,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 17:28:31,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:28:31,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 17:28:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:32,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:32,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:34,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:34,175 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:34,176 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 [2022-07-21 17:28:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:34,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:34,306 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:34,307 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 [2022-07-21 17:28:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:36,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:36,484 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:36,485 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 [2022-07-21 17:28:36,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:36,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:36,623 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:36,623 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 [2022-07-21 17:28:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:36,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:36,774 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:36,774 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 [2022-07-21 17:28:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 17:28:36,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:39,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:39,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420888098] [2022-07-21 17:28:39,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420888098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:28:39,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2052230546] [2022-07-21 17:28:39,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:28:39,686 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:28:39,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:28:39,687 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:28:39,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-21 17:28:39,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:28:39,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 17:28:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:39,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:39,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:40,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:40,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:40,025 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:40,025 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 [2022-07-21 17:28:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:40,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:40,119 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:40,119 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 [2022-07-21 17:28:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:42,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:42,261 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:42,261 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 [2022-07-21 17:28:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:44,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:44,411 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:44,411 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 [2022-07-21 17:28:46,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:46,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:28:46,532 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:46,532 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 [2022-07-21 17:28:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 17:28:46,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:49,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2052230546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:28:49,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:49,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2022-07-21 17:28:49,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446979538] [2022-07-21 17:28:49,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:28:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:49,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:28:49,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=321, Unknown=2, NotChecked=0, Total=380 [2022-07-21 17:28:49,126 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2022-07-21 17:28:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:49,775 INFO L93 Difference]: Finished difference Result 225 states and 253 transitions. [2022-07-21 17:28:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:28:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) Word has length 58 [2022-07-21 17:28:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:49,776 INFO L225 Difference]: With dead ends: 225 [2022-07-21 17:28:49,776 INFO L226 Difference]: Without dead ends: 225 [2022-07-21 17:28:49,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=66, Invalid=394, Unknown=2, NotChecked=0, Total=462 [2022-07-21 17:28:49,777 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:49,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 573 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 655 Invalid, 0 Unknown, 63 Unchecked, 0.6s Time] [2022-07-21 17:28:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-21 17:28:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 169. [2022-07-21 17:28:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.204225352112676) internal successors, (171), 149 states have internal predecessors, (171), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-21 17:28:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2022-07-21 17:28:49,781 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 58 [2022-07-21 17:28:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:49,781 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2022-07-21 17:28:49,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2022-07-21 17:28:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2022-07-21 17:28:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:28:49,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:49,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:49,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:49,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:28:50,193 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-21 17:28:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash -735616619, now seen corresponding path program 2 times [2022-07-21 17:28:50,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:50,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955906481] [2022-07-21 17:28:50,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:28:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:50,195 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) [2022-07-21 17:28:50,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-21 17:28:50,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:28:50,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 17:28:50,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:50,548 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 15 treesize of output 11 [2022-07-21 17:28:50,672 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:28:50,672 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 25 treesize of output 17 [2022-07-21 17:28:53,012 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-21 17:28:53,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-07-21 17:28:53,237 INFO L356 Elim1Store]: treesize reduction 39, result has 13.3 percent of original size [2022-07-21 17:28:53,237 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 3 case distinctions, treesize of input 113 treesize of output 103 [2022-07-21 17:28:56,121 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 17:28:56,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 42 [2022-07-21 17:29:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:29:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:29:08,155 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 32 treesize of output 30 [2022-07-21 17:29:08,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-07-21 17:29:12,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:12,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955906481] [2022-07-21 17:29:12,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955906481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:29:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1023428369] [2022-07-21 17:29:12,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:29:12,480 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:29:12,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:29:12,485 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:29:12,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-21 17:29:12,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:29:12,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:29:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 17:29:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:17,523 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 15 treesize of output 11 [2022-07-21 17:29:17,901 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-21 17:29:17,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2022-07-21 17:29:30,634 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-21 17:29:30,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-07-21 17:29:31,077 INFO L356 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2022-07-21 17:29:31,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 49 [2022-07-21 17:29:32,932 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 17:29:32,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 38 [2022-07-21 17:29:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:29:40,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:29:41,518 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 32 treesize of output 30 [2022-07-21 17:29:53,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1023428369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:29:53,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:29:53,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2022-07-21 17:29:53,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582328371] [2022-07-21 17:29:53,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:29:53,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 17:29:53,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 17:29:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4849, Unknown=22, NotChecked=0, Total=5112 [2022-07-21 17:29:53,113 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand has 48 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 42 states have internal predecessors, (89), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:30:11,853 WARN L233 SmtUtils]: Spent 9.94s on a formula simplification. DAG size of input: 46 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)