./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test18.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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:57:17,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:57:17,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:57:17,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:57:17,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:57:17,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:57:17,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:57:17,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:57:17,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:57:17,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:57:17,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:57:17,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:57:17,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:57:17,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:57:17,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:57:17,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:57:17,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:57:17,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:57:17,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:57:17,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:57:17,244 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:57:17,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:57:17,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:57:17,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:57:17,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:57:17,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:57:17,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:57:17,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:57:17,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:57:17,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:57:17,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:57:17,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:57:17,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:57:17,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:57:17,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:57:17,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:57:17,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:57:17,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:57:17,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:57:17,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:57:17,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:57:17,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:57:17,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:57:17,293 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:57:17,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:57:17,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:57:17,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:57:17,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:57:17,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:57:17,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:57:17,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:57:17,295 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:57:17,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:57:17,296 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:57:17,297 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:57:17,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:57:17,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:57:17,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:57:17,297 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:57:17,297 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:57:17,297 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:57:17,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:57:17,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:57:17,299 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:57:17,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:57:17,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:57:17,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:57:17,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:57:17,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:57:17,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:57:17,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:57:17,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:57:17,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:57:17,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2022-07-20 05:57:17,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:57:17,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:57:17,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:57:17,500 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:57:17,501 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:57:17,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-20 05:57:17,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9de6e148a/f24f59dfc0ec48cbb2770e744c56a561/FLAGf16630957 [2022-07-20 05:57:17,959 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:57:17,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-20 05:57:17,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9de6e148a/f24f59dfc0ec48cbb2770e744c56a561/FLAGf16630957 [2022-07-20 05:57:17,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9de6e148a/f24f59dfc0ec48cbb2770e744c56a561 [2022-07-20 05:57:17,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:57:17,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:57:18,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:57:18,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:57:18,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:57:18,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:57:17" (1/1) ... [2022-07-20 05:57:18,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1416a73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:18, skipping insertion in model container [2022-07-20 05:57:18,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:57:17" (1/1) ... [2022-07-20 05:57:18,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:57:18,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:57:18,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:57:18,344 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-20 05:57:18,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2df1d3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:18, skipping insertion in model container [2022-07-20 05:57:18,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:57:18,345 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-20 05:57:18,347 INFO L158 Benchmark]: Toolchain (without parser) took 355.61ms. Allocated memory is still 94.4MB. Free memory was 62.3MB in the beginning and 63.9MB in the end (delta: -1.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-20 05:57:18,348 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 05:57:18,349 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.14ms. Allocated memory is still 94.4MB. Free memory was 62.1MB in the beginning and 63.9MB in the end (delta: -1.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-20 05:57:18,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 343.14ms. Allocated memory is still 94.4MB. Free memory was 62.1MB in the beginning and 63.9MB in the end (delta: -1.9MB). Peak memory consumption was 6.3MB. 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.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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:57:19,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:57:19,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:57:19,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:57:19,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:57:19,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:57:19,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:57:19,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:57:19,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:57:19,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:57:19,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:57:19,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:57:19,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:57:19,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:57:19,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:57:19,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:57:19,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:57:19,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:57:19,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:57:19,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:57:19,884 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:57:19,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:57:19,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:57:19,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:57:19,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:57:19,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:57:19,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:57:19,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:57:19,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:57:19,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:57:19,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:57:19,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:57:19,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:57:19,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:57:19,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:57:19,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:57:19,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:57:19,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:57:19,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:57:19,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:57:19,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:57:19,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:57:19,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 05:57:19,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:57:19,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:57:19,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:57:19,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:57:19,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:57:19,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:57:19,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:57:19,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:57:19,918 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:57:19,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:57:19,919 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:57:19,919 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:57:19,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:57:19,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:57:19,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:57:19,920 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:57:19,920 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:57:19,920 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:57:19,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:57:19,921 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:57:19,921 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 05:57:19,921 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 05:57:19,921 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:57:19,921 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:57:19,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:57:19,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:57:19,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:57:19,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:57:19,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:57:19,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:57:19,923 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 05:57:19,923 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:19,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 05:57:19,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2022-07-20 05:57:20,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:57:20,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:57:20,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:57:20,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:57:20,230 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:57:20,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-20 05:57:20,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdcc3140/87999e3eb6344f8ba1ff161e95bf1f27/FLAG9838f6435 [2022-07-20 05:57:20,691 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:57:20,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-20 05:57:20,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdcc3140/87999e3eb6344f8ba1ff161e95bf1f27/FLAG9838f6435 [2022-07-20 05:57:20,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdcc3140/87999e3eb6344f8ba1ff161e95bf1f27 [2022-07-20 05:57:20,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:57:20,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:57:20,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:57:20,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:57:20,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:57:20,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:57:20" (1/1) ... [2022-07-20 05:57:20,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52088f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:20, skipping insertion in model container [2022-07-20 05:57:20,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:57:20" (1/1) ... [2022-07-20 05:57:20,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:57:20,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:57:21,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:57:21,066 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-20 05:57:21,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:57:21,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:57:21,140 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:57:21,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:57:21,231 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:57:21,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21 WrapperNode [2022-07-20 05:57:21,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:57:21,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:57:21,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:57:21,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:57:21,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,286 INFO L137 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 52 [2022-07-20 05:57:21,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:57:21,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:57:21,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:57:21,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:57:21,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:57:21,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:57:21,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:57:21,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:57:21,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (1/1) ... [2022-07-20 05:57:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:57:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:57:21,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 05:57:21,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 05:57:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-20 05:57:21,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-20 05:57:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 05:57:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:57:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 05:57:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 05:57:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:57:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 05:57:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:57:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:57:21,502 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:57:21,504 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:57:21,645 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:57:21,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:57:21,649 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 05:57:21,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:57:21 BoogieIcfgContainer [2022-07-20 05:57:21,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:57:21,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:57:21,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:57:21,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:57:21,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:57:20" (1/3) ... [2022-07-20 05:57:21,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19013f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:57:21, skipping insertion in model container [2022-07-20 05:57:21,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:57:21" (2/3) ... [2022-07-20 05:57:21,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19013f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:57:21, skipping insertion in model container [2022-07-20 05:57:21,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:57:21" (3/3) ... [2022-07-20 05:57:21,660 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test18.i [2022-07-20 05:57:21,670 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:57:21,670 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-20 05:57:21,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:57:21,708 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@4fdfd485, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1ef00b09 [2022-07-20 05:57:21,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-20 05:57:21,711 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) [2022-07-20 05:57:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:57:21,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:21,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:21,717 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)] === [2022-07-20 05:57:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1121278797, now seen corresponding path program 1 times [2022-07-20 05:57:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:21,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91296084] [2022-07-20 05:57:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:21,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:21,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:21,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:21,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 05:57:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:57:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:21,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:57:21,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:21,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91296084] [2022-07-20 05:57:21,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91296084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:57:21,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:57:21,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:57:21,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344799934] [2022-07-20 05:57:21,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:21,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:57:21,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:21,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:57:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:57:21,973 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) [2022-07-20 05:57:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:22,113 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-07-20 05:57:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:57:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-20 05:57:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:22,123 INFO L225 Difference]: With dead ends: 74 [2022-07-20 05:57:22,123 INFO L226 Difference]: Without dead ends: 70 [2022-07-20 05:57:22,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:57:22,148 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:22,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:57:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-20 05:57:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2022-07-20 05:57:22,186 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) [2022-07-20 05:57:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-20 05:57:22,188 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11 [2022-07-20 05:57:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:22,190 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-20 05:57:22,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:57:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-20 05:57:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:57:22,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:22,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:22,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:22,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:22,400 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)] === [2022-07-20 05:57:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2008782478, now seen corresponding path program 1 times [2022-07-20 05:57:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333949510] [2022-07-20 05:57:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:22,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:22,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:22,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 05:57:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:57:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:22,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:57:22,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:22,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333949510] [2022-07-20 05:57:22,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333949510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:57:22,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:57:22,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:57:22,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352204921] [2022-07-20 05:57:22,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:22,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:57:22,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:57:22,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:57:22,464 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) [2022-07-20 05:57:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:22,547 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-07-20 05:57:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:57:22,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-20 05:57:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:22,549 INFO L225 Difference]: With dead ends: 69 [2022-07-20 05:57:22,549 INFO L226 Difference]: Without dead ends: 67 [2022-07-20 05:57:22,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:57:22,550 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 [2022-07-20 05:57:22,551 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] [2022-07-20 05:57:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-20 05:57:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2022-07-20 05:57:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 34 states have internal predecessors, (38), 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) [2022-07-20 05:57:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-20 05:57:22,559 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 11 [2022-07-20 05:57:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:22,560 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-20 05:57:22,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:57:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-20 05:57:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:57:22,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:22,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:22,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-20 05:57:22,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:22,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-20 05:57:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash -539289096, now seen corresponding path program 1 times [2022-07-20 05:57:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:22,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072428904] [2022-07-20 05:57:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:22,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:22,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:22,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 05:57:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:22,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:57:22,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:22,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:57:22,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072428904] [2022-07-20 05:57:22,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072428904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:57:22,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:57:22,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:57:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028634051] [2022-07-20 05:57:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:57:22,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:57:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:57:22,835 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:57:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:22,869 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-07-20 05:57:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:57:22,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 13 [2022-07-20 05:57:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:22,871 INFO L225 Difference]: With dead ends: 67 [2022-07-20 05:57:22,871 INFO L226 Difference]: Without dead ends: 67 [2022-07-20 05:57:22,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:57:22,872 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 59 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:22,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:57:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-20 05:57:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-07-20 05:57:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 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) [2022-07-20 05:57:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-07-20 05:57:22,876 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2022-07-20 05:57:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:22,876 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-07-20 05:57:22,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 05:57:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-07-20 05:57:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:57:22,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:22,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:22,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:23,084 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)] === [2022-07-20 05:57:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1099978464, now seen corresponding path program 1 times [2022-07-20 05:57:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:23,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076049680] [2022-07-20 05:57:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:23,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:23,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:23,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 05:57:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:57:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:23,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:23,268 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:57:23,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-20 05:57:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:23,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:23,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:23,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076049680] [2022-07-20 05:57:23,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076049680] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:57:23,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:23,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-20 05:57:23,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706699765] [2022-07-20 05:57:23,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:23,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:57:23,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:23,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:57:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:57:23,424 INFO L87 Difference]: Start difference. First operand 39 states and 43 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) [2022-07-20 05:57:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:23,541 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-07-20 05:57:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:57:23,542 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 [2022-07-20 05:57:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:23,542 INFO L225 Difference]: With dead ends: 58 [2022-07-20 05:57:23,543 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 05:57:23,543 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 [2022-07-20 05:57:23,543 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:23,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 158 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-07-20 05:57:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 05:57:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-07-20 05:57:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 48 states have internal predecessors, (58), 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) [2022-07-20 05:57:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-20 05:57:23,547 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 18 [2022-07-20 05:57:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:23,548 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-20 05:57:23,548 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) [2022-07-20 05:57:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-20 05:57:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:57:23,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:23,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:23,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:23,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:23,758 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)] === [2022-07-20 05:57:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1099978465, now seen corresponding path program 1 times [2022-07-20 05:57:23,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:23,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986035258] [2022-07-20 05:57:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:23,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:23,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 05:57:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:23,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:57:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:23,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:23,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:23,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:23,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:23,989 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:23,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:57:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:24,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:28,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986035258] [2022-07-20 05:57:28,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986035258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:28,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324953390] [2022-07-20 05:57:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:57:28,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:57:28,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-07-20 05:57:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:57:28,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:28,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:28,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:28,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:28,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:28,767 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:28,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:57:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:28,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:31,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1324953390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:31,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:31,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-07-20 05:57:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821016409] [2022-07-20 05:57:31,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:31,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:57:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:57:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=126, Unknown=2, NotChecked=0, Total=156 [2022-07-20 05:57:31,194 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2022-07-20 05:57:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:32,096 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2022-07-20 05:57:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:57:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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 [2022-07-20 05:57:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:32,098 INFO L225 Difference]: With dead ends: 154 [2022-07-20 05:57:32,098 INFO L226 Difference]: Without dead ends: 154 [2022-07-20 05:57:32,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=37, Invalid=171, Unknown=2, NotChecked=0, Total=210 [2022-07-20 05:57:32,099 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 90 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:32,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 604 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 501 Invalid, 0 Unknown, 46 Unchecked, 0.8s Time] [2022-07-20 05:57:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-20 05:57:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2022-07-20 05:57:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 69 states have internal predecessors, (92), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 05:57:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 107 transitions. [2022-07-20 05:57:32,105 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 107 transitions. Word has length 18 [2022-07-20 05:57:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:32,106 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 107 transitions. [2022-07-20 05:57:32,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2022-07-20 05:57:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 107 transitions. [2022-07-20 05:57:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:57:32,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:32,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:32,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:32,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:32,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:32,509 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)] === [2022-07-20 05:57:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash 594419839, now seen corresponding path program 1 times [2022-07-20 05:57:32,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:32,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902566223] [2022-07-20 05:57:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:32,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:32,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:32,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 05:57:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:32,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:57:32,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:32,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:57:32,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:32,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902566223] [2022-07-20 05:57:32,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902566223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:57:32,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:57:32,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:57:32,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581365939] [2022-07-20 05:57:32,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:32,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:57:32,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:57:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:57:32,587 INFO L87 Difference]: Start difference. First operand 77 states and 107 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) [2022-07-20 05:57:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:32,638 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2022-07-20 05:57:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:57:32,639 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 [2022-07-20 05:57:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:32,640 INFO L225 Difference]: With dead ends: 70 [2022-07-20 05:57:32,640 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 05:57:32,640 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 [2022-07-20 05:57:32,641 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:32,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:57:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 05:57:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-20 05:57:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 62 states have internal predecessors, (82), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 05:57:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2022-07-20 05:57:32,645 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 18 [2022-07-20 05:57:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:32,645 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2022-07-20 05:57:32,645 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) [2022-07-20 05:57:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2022-07-20 05:57:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:57:32,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:32,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:32,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:32,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:32,851 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)] === [2022-07-20 05:57:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:32,851 INFO L85 PathProgramCache]: Analyzing trace with hash 517297676, now seen corresponding path program 1 times [2022-07-20 05:57:32,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:32,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441377008] [2022-07-20 05:57:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:32,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:32,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:32,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:32,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 05:57:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:32,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:57:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:57:32,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:57:32,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:32,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441377008] [2022-07-20 05:57:32,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441377008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:57:32,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:57:32,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:57:32,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934007890] [2022-07-20 05:57:32,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:32,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:57:32,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:32,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:57:32,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:57:32,921 INFO L87 Difference]: Start difference. First operand 68 states and 93 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) [2022-07-20 05:57:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:32,973 INFO L93 Difference]: Finished difference Result 113 states and 149 transitions. [2022-07-20 05:57:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:57:32,974 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 [2022-07-20 05:57:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:32,975 INFO L225 Difference]: With dead ends: 113 [2022-07-20 05:57:32,975 INFO L226 Difference]: Without dead ends: 113 [2022-07-20 05:57:32,975 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 [2022-07-20 05:57:32,976 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 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 [2022-07-20 05:57:32,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:57:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-20 05:57:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72. [2022-07-20 05:57:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 64 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 05:57:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2022-07-20 05:57:32,981 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 20 [2022-07-20 05:57:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:32,982 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2022-07-20 05:57:32,982 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) [2022-07-20 05:57:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2022-07-20 05:57:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:57:32,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:32,983 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:32,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:33,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:33,189 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)] === [2022-07-20 05:57:33,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:33,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2034859285, now seen corresponding path program 1 times [2022-07-20 05:57:33,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:33,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997752148] [2022-07-20 05:57:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:33,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:33,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:33,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:33,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 05:57:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:57:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:57:33,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:57:33,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:33,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997752148] [2022-07-20 05:57:33,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997752148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:57:33,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:57:33,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:57:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863765884] [2022-07-20 05:57:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:57:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:57:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:57:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:57:33,272 INFO L87 Difference]: Start difference. First operand 72 states and 97 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) [2022-07-20 05:57:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:33,332 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2022-07-20 05:57:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:57:33,333 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 [2022-07-20 05:57:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:33,333 INFO L225 Difference]: With dead ends: 72 [2022-07-20 05:57:33,333 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 05:57:33,333 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 [2022-07-20 05:57:33,334 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:33,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 109 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:57:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 05:57:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-07-20 05:57:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 56 states have internal predecessors, (70), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 05:57:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-07-20 05:57:33,340 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 20 [2022-07-20 05:57:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:33,340 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-07-20 05:57:33,340 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) [2022-07-20 05:57:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-07-20 05:57:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 05:57:33,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:33,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:33,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:33,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:33,542 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)] === [2022-07-20 05:57:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1343870148, now seen corresponding path program 1 times [2022-07-20 05:57:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:33,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334703927] [2022-07-20 05:57:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:33,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:33,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:33,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:33,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 05:57:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:57:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:57:33,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:57:33,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:33,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334703927] [2022-07-20 05:57:33,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334703927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:57:33,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:33,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-20 05:57:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878489797] [2022-07-20 05:57:33,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:57:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:57:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:57:33,877 INFO L87 Difference]: Start difference. First operand 64 states and 81 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) [2022-07-20 05:57:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:34,027 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2022-07-20 05:57:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:57:34,028 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 [2022-07-20 05:57:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:34,028 INFO L225 Difference]: With dead ends: 67 [2022-07-20 05:57:34,028 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 05:57:34,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:57:34,029 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:34,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 132 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-07-20 05:57:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 05:57:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-20 05:57:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.4) internal successors, (70), 56 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 05:57:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2022-07-20 05:57:34,034 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 21 [2022-07-20 05:57:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:34,034 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2022-07-20 05:57:34,034 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) [2022-07-20 05:57:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2022-07-20 05:57:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:57:34,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:34,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:34,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:34,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:34,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-20 05:57:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2006472631, now seen corresponding path program 1 times [2022-07-20 05:57:34,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:34,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790655688] [2022-07-20 05:57:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:34,246 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:34,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 05:57:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:57:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:57:34,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:57:34,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790655688] [2022-07-20 05:57:34,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790655688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:57:34,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:34,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 05:57:34,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112604221] [2022-07-20 05:57:34,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:34,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:57:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:34,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:57:34,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:57:34,449 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-07-20 05:57:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:34,583 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2022-07-20 05:57:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:57:34,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 23 [2022-07-20 05:57:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:34,585 INFO L225 Difference]: With dead ends: 181 [2022-07-20 05:57:34,585 INFO L226 Difference]: Without dead ends: 181 [2022-07-20 05:57:34,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:57:34,586 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 197 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:34,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 189 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:57:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-20 05:57:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 92. [2022-07-20 05:57:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.364864864864865) internal successors, (101), 78 states have internal predecessors, (101), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-20 05:57:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2022-07-20 05:57:34,593 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 23 [2022-07-20 05:57:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:34,593 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2022-07-20 05:57:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-07-20 05:57:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2022-07-20 05:57:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 05:57:34,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:34,594 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] [2022-07-20 05:57:34,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:34,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:34,805 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)] === [2022-07-20 05:57:34,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:34,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1845507550, now seen corresponding path program 1 times [2022-07-20 05:57:34,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:34,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346712848] [2022-07-20 05:57:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:34,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:34,807 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:34,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 05:57:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:34,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:57:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:57:35,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:39,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:39,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346712848] [2022-07-20 05:57:39,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346712848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:39,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126689375] [2022-07-20 05:57:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:39,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:39,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:57:39,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:57:39,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-20 05:57:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 05:57:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:57:39,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:43,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126689375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:43,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:43,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-20 05:57:43,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483165970] [2022-07-20 05:57:43,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:43,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:57:43,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:57:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-20 05:57:43,666 INFO L87 Difference]: Start difference. First operand 92 states and 121 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) [2022-07-20 05:57:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:43,779 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-07-20 05:57:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:57:43,779 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 [2022-07-20 05:57:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:43,780 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:57:43,780 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 05:57:43,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-20 05:57:43,781 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:43,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 256 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-07-20 05:57:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 05:57:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-07-20 05:57:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 77 states have internal predecessors, (97), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-20 05:57:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2022-07-20 05:57:43,785 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 24 [2022-07-20 05:57:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:43,785 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2022-07-20 05:57:43,786 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) [2022-07-20 05:57:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2022-07-20 05:57:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 05:57:43,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:43,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:57:43,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:43,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-20 05:57:44,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:44,189 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)] === [2022-07-20 05:57:44,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2918772, now seen corresponding path program 1 times [2022-07-20 05:57:44,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:44,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58954872] [2022-07-20 05:57:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:44,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:44,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:44,191 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:44,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 05:57:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 05:57:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:44,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:44,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:44,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:44,492 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:44,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:57:46,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:46,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:46,698 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:46,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:57:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:57:46,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:49,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58954872] [2022-07-20 05:57:49,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58954872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771066952] [2022-07-20 05:57:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:49,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:57:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:57:49,306 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) [2022-07-20 05:57:49,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-07-20 05:57:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 05:57:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:49,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:49,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:57:49,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:49,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:49,554 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:49,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:57:49,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:57:49,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:57:49,712 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:57:49,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:57:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:57:49,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:52,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771066952] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:57:52,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:52,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-20 05:57:52,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821686151] [2022-07-20 05:57:52,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:52,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:57:52,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:57:52,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2022-07-20 05:57:52,234 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2022-07-20 05:57:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:54,697 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2022-07-20 05:57:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:57:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 [2022-07-20 05:57:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:54,699 INFO L225 Difference]: With dead ends: 141 [2022-07-20 05:57:54,699 INFO L226 Difference]: Without dead ends: 141 [2022-07-20 05:57:54,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=46, Invalid=224, Unknown=2, NotChecked=0, Total=272 [2022-07-20 05:57:54,699 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 91 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:54,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 228 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 260 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-07-20 05:57:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-20 05:57:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 94. [2022-07-20 05:57:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 82 states have internal predecessors, (107), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-20 05:57:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-07-20 05:57:54,703 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 28 [2022-07-20 05:57:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:54,703 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-07-20 05:57:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2022-07-20 05:57:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-07-20 05:57:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 05:57:54,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:54,704 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] [2022-07-20 05:57:54,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:54,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:55,104 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 [2022-07-20 05:57:55,105 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)] === [2022-07-20 05:57:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:55,105 INFO L85 PathProgramCache]: Analyzing trace with hash 252730558, now seen corresponding path program 1 times [2022-07-20 05:57:55,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:55,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138087720] [2022-07-20 05:57:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:55,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:55,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 05:57:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:57:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:57:55,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:55,936 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 [2022-07-20 05:57:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:57:56,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:56,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138087720] [2022-07-20 05:57:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138087720] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:57:56,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:56,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-20 05:57:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130737525] [2022-07-20 05:57:56,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:56,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:57:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:56,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:57:56,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:57:56,310 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2022-07-20 05:57:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:57,936 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2022-07-20 05:57:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 05:57:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 [2022-07-20 05:57:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:57,937 INFO L225 Difference]: With dead ends: 160 [2022-07-20 05:57:57,938 INFO L226 Difference]: Without dead ends: 160 [2022-07-20 05:57:57,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:57:57,939 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 365 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:57,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 257 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 283 Invalid, 0 Unknown, 44 Unchecked, 0.8s Time] [2022-07-20 05:57:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-20 05:57:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 77. [2022-07-20 05:57:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 65 states have internal predecessors, (76), 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) [2022-07-20 05:57:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-07-20 05:57:57,943 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 30 [2022-07-20 05:57:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:57,943 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-07-20 05:57:57,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2022-07-20 05:57:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-07-20 05:57:57,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 05:57:57,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:57,944 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] [2022-07-20 05:57:57,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:58,151 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)] === [2022-07-20 05:57:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash -755287307, now seen corresponding path program 1 times [2022-07-20 05:57:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:58,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107800308] [2022-07-20 05:57:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:58,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:58,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:58,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:58,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 05:57:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 05:57:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:57:58,318 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 [2022-07-20 05:57:58,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:57:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:57:58,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:57:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:57:58,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:57:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107800308] [2022-07-20 05:57:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107800308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:57:58,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:57:58,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-07-20 05:57:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48015995] [2022-07-20 05:57:58,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:57:58,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:57:58,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:57:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:57:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:57:58,703 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 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) [2022-07-20 05:57:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:57:59,443 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2022-07-20 05:57:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:57:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 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 [2022-07-20 05:57:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:57:59,444 INFO L225 Difference]: With dead ends: 117 [2022-07-20 05:57:59,444 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 05:57:59,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-07-20 05:57:59,445 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 286 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:57:59,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 256 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 394 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-07-20 05:57:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 05:57:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2022-07-20 05:57:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 71 states have internal predecessors, (82), 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) [2022-07-20 05:57:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-07-20 05:57:59,448 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 31 [2022-07-20 05:57:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:57:59,448 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-07-20 05:57:59,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 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) [2022-07-20 05:57:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-07-20 05:57:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 05:57:59,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:57:59,449 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] [2022-07-20 05:57:59,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:57:59,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:57:59,656 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)] === [2022-07-20 05:57:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:57:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1939069955, now seen corresponding path program 1 times [2022-07-20 05:57:59,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:57:59,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577700303] [2022-07-20 05:57:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:57:59,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:57:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:57:59,658 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:57:59,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 05:57:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:57:59,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:57:59,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:00,015 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 [2022-07-20 05:58:00,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:58:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:58:00,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:58:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:58:00,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:58:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577700303] [2022-07-20 05:58:00,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577700303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:58:00,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:58:00,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2022-07-20 05:58:00,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731936552] [2022-07-20 05:58:00,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:58:00,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 05:58:00,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:58:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 05:58:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:58:00,768 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 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) [2022-07-20 05:58:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:58:01,064 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2022-07-20 05:58:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:58:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 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 [2022-07-20 05:58:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:58:01,065 INFO L225 Difference]: With dead ends: 143 [2022-07-20 05:58:01,065 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 05:58:01,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:58:01,066 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:58:01,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 266 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-07-20 05:58:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 05:58:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2022-07-20 05:58:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 100 states have (on average 1.26) internal successors, (126), 107 states have internal predecessors, (126), 8 states have call successors, (8), 6 states have call predecessors, (8), 10 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-20 05:58:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-07-20 05:58:01,070 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 32 [2022-07-20 05:58:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:58:01,070 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-07-20 05:58:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 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) [2022-07-20 05:58:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-07-20 05:58:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 05:58:01,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:58:01,071 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] [2022-07-20 05:58:01,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:58:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:58:01,271 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)] === [2022-07-20 05:58:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:58:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1947073116, now seen corresponding path program 2 times [2022-07-20 05:58:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:58:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81901692] [2022-07-20 05:58:01,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:58:01,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:58:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:58:01,273 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:58:01,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 05:58:01,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:58:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:58:01,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:58:01,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:58:01,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:58:01,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:58:01,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81901692] [2022-07-20 05:58:01,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81901692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:58:01,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:58:01,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:58:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411096083] [2022-07-20 05:58:01,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:58:01,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:58:01,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:58:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:58:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:58:01,358 INFO L87 Difference]: Start difference. First operand 126 states and 149 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) [2022-07-20 05:58:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:58:01,386 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2022-07-20 05:58:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:58:01,387 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 [2022-07-20 05:58:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:58:01,387 INFO L225 Difference]: With dead ends: 112 [2022-07-20 05:58:01,387 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 05:58:01,388 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 [2022-07-20 05:58:01,388 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:58:01,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 148 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:58:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 05:58:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2022-07-20 05:58:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.208955223880597) internal successors, (81), 73 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:58:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-07-20 05:58:01,391 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 32 [2022-07-20 05:58:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:58:01,391 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-07-20 05:58:01,392 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) [2022-07-20 05:58:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-07-20 05:58:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:58:01,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:58:01,392 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] [2022-07-20 05:58:01,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:58:01,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:58:01,599 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)] === [2022-07-20 05:58:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:58:01,600 INFO L85 PathProgramCache]: Analyzing trace with hash 18373623, now seen corresponding path program 1 times [2022-07-20 05:58:01,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:58:01,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713197649] [2022-07-20 05:58:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:58:01,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:58:01,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:58:01,602 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:58:01,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 05:58:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:58:01,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:58:01,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:01,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:58:01,743 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 [2022-07-20 05:58:01,806 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 [2022-07-20 05:58:01,885 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 [2022-07-20 05:58:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:58:01,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:58:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:58:02,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:58:02,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713197649] [2022-07-20 05:58:02,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713197649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:58:02,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:58:02,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2022-07-20 05:58:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515288110] [2022-07-20 05:58:02,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:58:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 05:58:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:58:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 05:58:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:58:02,189 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 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) [2022-07-20 05:58:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:58:03,115 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-07-20 05:58:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:58:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 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 [2022-07-20 05:58:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:58:03,116 INFO L225 Difference]: With dead ends: 96 [2022-07-20 05:58:03,116 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:58:03,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:58:03,117 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:58:03,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 255 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 616 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-07-20 05:58:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:58:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2022-07-20 05:58:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 75 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:58:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-07-20 05:58:03,119 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 33 [2022-07-20 05:58:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:58:03,119 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-07-20 05:58:03,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 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) [2022-07-20 05:58:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-07-20 05:58:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 05:58:03,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:58:03,120 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] [2022-07-20 05:58:03,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:58:03,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:58:03,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-20 05:58:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:58:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1907841251, now seen corresponding path program 1 times [2022-07-20 05:58:03,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:58:03,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997123321] [2022-07-20 05:58:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:58:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:58:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:58:03,329 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:58:03,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 05:58:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:58:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:58:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:58:03,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:58:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:58:03,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:58:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997123321] [2022-07-20 05:58:03,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997123321] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:58:03,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:58:03,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-20 05:58:03,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565118410] [2022-07-20 05:58:03,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:58:03,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:58:03,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:58:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:58:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:58:03,526 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-07-20 05:58:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:58:03,681 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2022-07-20 05:58:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:58:03,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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 [2022-07-20 05:58:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:58:03,683 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:58:03,683 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 05:58:03,683 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 [2022-07-20 05:58:03,683 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 52 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:58:03,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:58:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 05:58:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2022-07-20 05:58:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.2) internal successors, (90), 81 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:58:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-07-20 05:58:03,686 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 36 [2022-07-20 05:58:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:58:03,687 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-07-20 05:58:03,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-07-20 05:58:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-07-20 05:58:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 05:58:03,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:58:03,688 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:58:03,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:58:03,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:58:03,894 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)] === [2022-07-20 05:58:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:58:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1443160135, now seen corresponding path program 2 times [2022-07-20 05:58:03,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:58:03,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111404850] [2022-07-20 05:58:03,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:58:03,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:58:03,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:58:03,896 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:58:03,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 05:58:03,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:58:03,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:58:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 05:58:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:03,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:58:04,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:58:04,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:58:04,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:58:04,194 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:58:04,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:58:04,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:58:04,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:58:04,378 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:58:04,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:58:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:58:06,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:58:06,552 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:58:06,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:58:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:58:06,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:58:09,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:58:09,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111404850] [2022-07-20 05:58:09,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111404850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:58:09,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [812336124] [2022-07-20 05:58:09,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:58:09,421 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:58:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:58:09,422 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 05:58:09,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-20 05:58:09,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:58:09,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:58:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 05:58:09,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:09,564 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 [2022-07-20 05:58:09,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:58:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:58:09,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:58:09,701 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:58:09,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:58:09,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:58:09,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:58:09,812 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:58:09,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:58:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:58:09,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:58:09,926 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:58:09,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:58:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:58:09,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:58:12,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [812336124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:58:12,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:58:12,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2022-07-20 05:58:12,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591435416] [2022-07-20 05:58:12,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:58:12,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:58:12,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:58:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:58:12,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2022-07-20 05:58:12,428 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) [2022-07-20 05:58:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:58:12,860 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2022-07-20 05:58:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:58:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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 [2022-07-20 05:58:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:58:12,861 INFO L225 Difference]: With dead ends: 141 [2022-07-20 05:58:12,861 INFO L226 Difference]: Without dead ends: 141 [2022-07-20 05:58:12,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=55, Invalid=286, Unknown=1, NotChecked=0, Total=342 [2022-07-20 05:58:12,862 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 84 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:58:12,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 327 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 400 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-07-20 05:58:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-20 05:58:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 93. [2022-07-20 05:58:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 81 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:58:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2022-07-20 05:58:12,865 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 38 [2022-07-20 05:58:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:58:12,865 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2022-07-20 05:58:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) [2022-07-20 05:58:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2022-07-20 05:58:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 05:58:12,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:58:12,866 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] [2022-07-20 05:58:12,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:58:13,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-20 05:58:13,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:58:13,271 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)] === [2022-07-20 05:58:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:58:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash -515638253, now seen corresponding path program 1 times [2022-07-20 05:58:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:58:13,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129535347] [2022-07-20 05:58:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:58:13,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:58:13,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:58:13,273 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:58:13,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-20 05:58:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:58:13,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 05:58:13,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:13,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:58:13,454 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 05:58:13,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-20 05:58:13,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 05:58:13,617 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 [2022-07-20 05:58:19,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 05:58:19,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-20 05:58:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:58:19,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:58:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:58:20,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:58:20,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129535347] [2022-07-20 05:58:20,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129535347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:58:20,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:58:20,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2022-07-20 05:58:20,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079945749] [2022-07-20 05:58:20,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:58:20,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:58:20,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:58:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:58:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=563, Unknown=2, NotChecked=0, Total=650 [2022-07-20 05:58:20,359 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 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) [2022-07-20 05:58:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:58:22,261 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-07-20 05:58:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:58:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 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 [2022-07-20 05:58:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:58:22,262 INFO L225 Difference]: With dead ends: 140 [2022-07-20 05:58:22,262 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 05:58:22,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=263, Invalid=1897, Unknown=2, NotChecked=0, Total=2162 [2022-07-20 05:58:22,263 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 137 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:58:22,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 211 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 649 Invalid, 0 Unknown, 94 Unchecked, 0.8s Time] [2022-07-20 05:58:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 05:58:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2022-07-20 05:58:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.205128205128205) internal successors, (94), 84 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:58:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2022-07-20 05:58:22,266 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 38 [2022-07-20 05:58:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:58:22,266 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2022-07-20 05:58:22,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 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) [2022-07-20 05:58:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2022-07-20 05:58:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 05:58:22,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:58:22,267 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] [2022-07-20 05:58:22,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:58:22,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:58:22,474 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)] === [2022-07-20 05:58:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:58:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1607118890, now seen corresponding path program 1 times [2022-07-20 05:58:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:58:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817221055] [2022-07-20 05:58:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:58:22,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:58:22,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:58:22,476 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:58:22,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 05:58:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:58:22,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:58:22,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:22,821 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 [2022-07-20 05:58:22,985 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-20 05:58:22,986 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 [2022-07-20 05:58:23,156 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 [2022-07-20 05:58:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:58:27,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:58:41,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:58:41,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817221055] [2022-07-20 05:58:41,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817221055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:58:41,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1021010613] [2022-07-20 05:58:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:58:41,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:58:41,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:58:41,053 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) [2022-07-20 05:58:41,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-07-20 05:58:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:58:41,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 05:58:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:58:43,785 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 [2022-07-20 05:58:44,014 INFO L356 Elim1Store]: treesize reduction 19, result has 24.0 percent of original size [2022-07-20 05:58:44,015 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 [2022-07-20 05:58:44,203 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 [2022-07-20 05:58:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:58:56,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:59:01,457 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 [2022-07-20 05:59:06,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1021010613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:59:06,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:59:06,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-07-20 05:59:06,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027953820] [2022-07-20 05:59:06,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:59:06,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:59:06,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:59:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:59:06,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2231, Unknown=14, NotChecked=0, Total=2450 [2022-07-20 05:59:06,358 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-07-20 05:59:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:59:06,376 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-07-20 05:59:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:59:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 [2022-07-20 05:59:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:59:06,377 INFO L225 Difference]: With dead ends: 101 [2022-07-20 05:59:06,377 INFO L226 Difference]: Without dead ends: 84 [2022-07-20 05:59:06,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=205, Invalid=2231, Unknown=14, NotChecked=0, Total=2450 [2022-07-20 05:59:06,378 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:59:06,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 305 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 179 Unchecked, 0.0s Time] [2022-07-20 05:59:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-20 05:59:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-20 05:59:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 73 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-20 05:59:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-07-20 05:59:06,380 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 40 [2022-07-20 05:59:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:59:06,381 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-07-20 05:59:06,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-07-20 05:59:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-07-20 05:59:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 05:59:06,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:59:06,381 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] [2022-07-20 05:59:06,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-07-20 05:59:06,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:59:06,784 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 [2022-07-20 05:59:06,784 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)] === [2022-07-20 05:59:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:59:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1528456508, now seen corresponding path program 1 times [2022-07-20 05:59:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:59:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047395940] [2022-07-20 05:59:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:59:06,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:59:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:59:06,786 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:59:06,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 05:59:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:59:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:59:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:59:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:59:06,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:59:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:59:06,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:59:06,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047395940] [2022-07-20 05:59:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047395940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:59:06,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:59:06,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-20 05:59:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14956883] [2022-07-20 05:59:06,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:59:06,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:59:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:59:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:59:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:59:06,972 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2022-07-20 05:59:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:59:07,234 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2022-07-20 05:59:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:59:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 [2022-07-20 05:59:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:59:07,238 INFO L225 Difference]: With dead ends: 138 [2022-07-20 05:59:07,238 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 05:59:07,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:59:07,238 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 126 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:59:07,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 215 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:59:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 05:59:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2022-07-20 05:59:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 82 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-20 05:59:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-07-20 05:59:07,241 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 44 [2022-07-20 05:59:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:59:07,242 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-07-20 05:59:07,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2022-07-20 05:59:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-07-20 05:59:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:59:07,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:59:07,242 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] [2022-07-20 05:59:07,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:59:07,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:59:07,449 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)] === [2022-07-20 05:59:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:59:07,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1589564234, now seen corresponding path program 2 times [2022-07-20 05:59:07,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:59:07,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517414736] [2022-07-20 05:59:07,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:59:07,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:59:07,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:59:07,452 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:59:07,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-20 05:59:07,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:59:07,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:59:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:59:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:59:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:59:07,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:59:08,048 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 [2022-07-20 05:59:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:59:09,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:59:09,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517414736] [2022-07-20 05:59:09,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517414736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:59:09,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:59:09,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-20 05:59:09,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962708401] [2022-07-20 05:59:09,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:59:09,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:59:09,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:59:09,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:59:09,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:59:09,858 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 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) [2022-07-20 05:59:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:59:15,868 INFO L93 Difference]: Finished difference Result 223 states and 237 transitions. [2022-07-20 05:59:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 05:59:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 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 [2022-07-20 05:59:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:59:15,871 INFO L225 Difference]: With dead ends: 223 [2022-07-20 05:59:15,871 INFO L226 Difference]: Without dead ends: 223 [2022-07-20 05:59:15,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:59:15,872 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 513 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:59:15,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 367 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 05:59:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-20 05:59:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 107. [2022-07-20 05:59:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 95 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-20 05:59:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2022-07-20 05:59:15,876 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 46 [2022-07-20 05:59:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:59:15,876 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2022-07-20 05:59:15,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 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) [2022-07-20 05:59:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2022-07-20 05:59:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 05:59:15,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:59:15,878 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:59:15,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-20 05:59:16,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:59:16,085 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)] === [2022-07-20 05:59:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:59:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash -899085478, now seen corresponding path program 3 times [2022-07-20 05:59:16,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:59:16,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286036061] [2022-07-20 05:59:16,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:59:16,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:59:16,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:59:16,087 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:59:16,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-20 05:59:16,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 05:59:16,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:59:16,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 05:59:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:59:16,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:59:20,451 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:59:20,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:59:20,650 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 5 treesize of output 3 [2022-07-20 05:59:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:59:22,807 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-20 05:59:22,807 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 24 treesize of output 31 [2022-07-20 05:59:22,816 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:59:22,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:59:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:59:27,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:59:27,152 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:59:27,153 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 15 treesize of output 15 [2022-07-20 05:59:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:59:31,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:59:31,394 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:59:31,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:59:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:59:31,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:59:34,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:59:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286036061] [2022-07-20 05:59:34,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286036061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:59:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60318420] [2022-07-20 05:59:34,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:59:34,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 05:59:34,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 05:59:34,261 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) [2022-07-20 05:59:34,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-20 05:59:34,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 05:59:34,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:59:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 05:59:34,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:59:34,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:59:34,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:59:34,876 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:59:34,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 05:59:34,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:59:35,172 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:59:35,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:59:35,188 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:59:35,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:59:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:59:37,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:59:37,524 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:59:37,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:59:43,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:59:43,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:59:43,743 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:59:43,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-20 05:59:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 05:59:43,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:59:46,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60318420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:59:46,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:59:46,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 30 [2022-07-20 05:59:46,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795706481] [2022-07-20 05:59:46,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:59:46,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:59:46,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:59:46,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:59:46,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=939, Unknown=4, NotChecked=0, Total=1056 [2022-07-20 05:59:46,463 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 26 states have internal predecessors, (47), 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) [2022-07-20 05:59:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:59:49,420 INFO L93 Difference]: Finished difference Result 201 states and 226 transitions. [2022-07-20 05:59:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:59:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 26 states have internal predecessors, (47), 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 [2022-07-20 05:59:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:59:49,430 INFO L225 Difference]: With dead ends: 201 [2022-07-20 05:59:49,430 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 05:59:49,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=169, Invalid=1386, Unknown=5, NotChecked=0, Total=1560 [2022-07-20 05:59:49,431 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 110 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:59:49,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 611 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 689 Invalid, 0 Unknown, 222 Unchecked, 0.6s Time] [2022-07-20 05:59:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 05:59:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 111. [2022-07-20 05:59:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 98 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 05:59:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-07-20 05:59:49,435 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 48 [2022-07-20 05:59:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:59:49,435 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-07-20 05:59:49,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 26 states have internal predecessors, (47), 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) [2022-07-20 05:59:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-07-20 05:59:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 05:59:49,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:59:49,436 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] [2022-07-20 05:59:49,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:59:49,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-20 05:59:49,844 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 [2022-07-20 05:59:49,845 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)] === [2022-07-20 05:59:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:59:49,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2031851011, now seen corresponding path program 1 times [2022-07-20 05:59:49,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:59:49,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118749188] [2022-07-20 05:59:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:59:49,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:59:49,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:59:49,846 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:59:49,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-20 05:59:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:59:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:59:49,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:59:50,015 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 [2022-07-20 05:59:50,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:59:50,131 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 [2022-07-20 05:59:50,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:59:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:59:50,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:59:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:59:50,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:59:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118749188] [2022-07-20 05:59:50,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118749188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:59:50,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:59:50,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2022-07-20 05:59:50,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153213754] [2022-07-20 05:59:50,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:59:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 05:59:50,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:59:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 05:59:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:59:50,733 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 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) [2022-07-20 05:59:53,690 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 [] [2022-07-20 05:59:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:59:54,281 INFO L93 Difference]: Finished difference Result 147 states and 160 transitions. [2022-07-20 05:59:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:59:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 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 [2022-07-20 05:59:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:59:54,283 INFO L225 Difference]: With dead ends: 147 [2022-07-20 05:59:54,283 INFO L226 Difference]: Without dead ends: 147 [2022-07-20 05:59:54,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 05:59:54,284 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 352 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:59:54,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 325 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 539 Invalid, 1 Unknown, 44 Unchecked, 2.7s Time] [2022-07-20 05:59:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-20 05:59:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2022-07-20 05:59:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 104 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 05:59:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2022-07-20 05:59:54,287 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 47 [2022-07-20 05:59:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:59:54,287 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2022-07-20 05:59:54,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 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) [2022-07-20 05:59:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2022-07-20 05:59:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 05:59:54,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:59:54,288 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] [2022-07-20 05:59:54,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:59:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:59:54,499 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)] === [2022-07-20 05:59:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:59:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1437128181, now seen corresponding path program 1 times [2022-07-20 05:59:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:59:54,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160030239] [2022-07-20 05:59:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:59:54,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:59:54,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:59:54,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:59:54,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-20 05:59:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:59:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:59:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:59:54,690 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 [2022-07-20 05:59:54,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:59:54,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-20 05:59:55,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:59:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:59:55,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:59:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 05:59:55,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:59:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160030239] [2022-07-20 05:59:55,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160030239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:59:55,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:59:55,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-07-20 05:59:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674280605] [2022-07-20 05:59:55,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:59:55,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 05:59:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:59:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 05:59:55,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:59:55,598 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 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) [2022-07-20 05:59:59,168 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 [] [2022-07-20 06:00:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:00:00,336 INFO L93 Difference]: Finished difference Result 145 states and 158 transitions. [2022-07-20 06:00:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 06:00:00,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 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 [2022-07-20 06:00:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:00:00,338 INFO L225 Difference]: With dead ends: 145 [2022-07-20 06:00:00,338 INFO L226 Difference]: Without dead ends: 145 [2022-07-20 06:00:00,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 06:00:00,339 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 276 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:00:00,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 261 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 668 Invalid, 1 Unknown, 66 Unchecked, 3.2s Time] [2022-07-20 06:00:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-20 06:00:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2022-07-20 06:00:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 105 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 06:00:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2022-07-20 06:00:00,342 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 48 [2022-07-20 06:00:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:00:00,342 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2022-07-20 06:00:00,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 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) [2022-07-20 06:00:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2022-07-20 06:00:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 06:00:00,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:00:00,343 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] [2022-07-20 06:00:00,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-20 06:00:00,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:00:00,550 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)] === [2022-07-20 06:00:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:00:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1601300735, now seen corresponding path program 1 times [2022-07-20 06:00:00,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:00:00,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121343086] [2022-07-20 06:00:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:00:00,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:00:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:00:00,552 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:00:00,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-20 06:00:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:00:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 06:00:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:00,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:00:00,744 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 [2022-07-20 06:00:00,829 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 [2022-07-20 06:00:00,891 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-20 06:00:00,891 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 [2022-07-20 06:00:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:00,983 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 [2022-07-20 06:00:01,084 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 [2022-07-20 06:00:01,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:01,382 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 [2022-07-20 06:00:01,464 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:00:01,464 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 [2022-07-20 06:00:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:00:01,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:00:02,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:00:02,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121343086] [2022-07-20 06:00:02,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121343086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:00:02,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [781034386] [2022-07-20 06:00:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:00:02,000 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:00:02,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:00:02,001 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:00:02,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-20 06:00:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:00:02,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 06:00:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:02,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:00:02,221 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 [2022-07-20 06:00:02,263 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 [2022-07-20 06:00:02,319 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-20 06:00:02,320 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 [2022-07-20 06:00:02,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:02,362 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 [2022-07-20 06:00:02,439 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 [2022-07-20 06:00:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:02,619 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 [2022-07-20 06:00:02,683 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:00:02,683 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 [2022-07-20 06:00:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:00:02,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:00:02,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [781034386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:00:02,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:00:02,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2022-07-20 06:00:02,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820841544] [2022-07-20 06:00:02,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:00:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 06:00:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:00:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 06:00:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-07-20 06:00:02,887 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 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) [2022-07-20 06:00:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:00:03,575 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2022-07-20 06:00:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 06:00:03,576 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 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 [2022-07-20 06:00:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:00:03,577 INFO L225 Difference]: With dead ends: 131 [2022-07-20 06:00:03,577 INFO L226 Difference]: Without dead ends: 131 [2022-07-20 06:00:03,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 06:00:03,577 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:00:03,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 270 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 425 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-07-20 06:00:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-20 06:00:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-07-20 06:00:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.202020202020202) internal successors, (119), 105 states have internal predecessors, (119), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 06:00:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2022-07-20 06:00:03,580 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 49 [2022-07-20 06:00:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:00:03,581 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2022-07-20 06:00:03,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 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) [2022-07-20 06:00:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2022-07-20 06:00:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 06:00:03,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:00:03,582 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] [2022-07-20 06:00:03,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-20 06:00:03,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-20 06:00:03,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 06:00:03,989 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-20 06:00:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:00:03,990 INFO L85 PathProgramCache]: Analyzing trace with hash 148524762, now seen corresponding path program 1 times [2022-07-20 06:00:03,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:00:03,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350802154] [2022-07-20 06:00:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:00:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:00:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:00:03,991 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:00:03,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-20 06:00:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:00:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 06:00:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 06:00:04,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:00:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 06:00:04,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:00:04,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350802154] [2022-07-20 06:00:04,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350802154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:00:04,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:00:04,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 06:00:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961512140] [2022-07-20 06:00:04,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:00:04,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 06:00:04,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:00:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 06:00:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:00:04,331 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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) [2022-07-20 06:00:04,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:00:04,555 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2022-07-20 06:00:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:00:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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 [2022-07-20 06:00:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:00:04,557 INFO L225 Difference]: With dead ends: 119 [2022-07-20 06:00:04,557 INFO L226 Difference]: Without dead ends: 119 [2022-07-20 06:00:04,557 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 [2022-07-20 06:00:04,558 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:00:04,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 337 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:00:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-20 06:00:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-07-20 06:00:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 92 states have (on average 1.141304347826087) internal successors, (105), 98 states have internal predecessors, (105), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 06:00:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-07-20 06:00:04,562 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 52 [2022-07-20 06:00:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:00:04,562 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-07-20 06:00:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 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) [2022-07-20 06:00:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-07-20 06:00:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 06:00:04,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:00:04,563 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:00:04,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-20 06:00:04,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:00:04,770 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-20 06:00:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:00:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1274788323, now seen corresponding path program 1 times [2022-07-20 06:00:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:00:04,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356423258] [2022-07-20 06:00:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:00:04,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:00:04,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:00:04,772 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:00:04,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-20 06:00:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:00:04,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 06:00:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 06:00:04,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:00:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 06:00:05,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:00:05,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356423258] [2022-07-20 06:00:05,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356423258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:00:05,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:00:05,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 06:00:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092593790] [2022-07-20 06:00:05,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:00:05,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 06:00:05,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:00:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 06:00:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:00:05,222 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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) [2022-07-20 06:00:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:00:05,681 INFO L93 Difference]: Finished difference Result 387 states and 411 transitions. [2022-07-20 06:00:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 06:00:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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 55 [2022-07-20 06:00:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:00:05,683 INFO L225 Difference]: With dead ends: 387 [2022-07-20 06:00:05,683 INFO L226 Difference]: Without dead ends: 387 [2022-07-20 06:00:05,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-07-20 06:00:05,684 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 777 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:00:05,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 530 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:00:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-20 06:00:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 144. [2022-07-20 06:00:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 125 states have internal predecessors, (137), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-20 06:00:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2022-07-20 06:00:05,688 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 55 [2022-07-20 06:00:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:00:05,688 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2022-07-20 06:00:05,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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) [2022-07-20 06:00:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2022-07-20 06:00:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 06:00:05,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:00:05,689 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] [2022-07-20 06:00:05,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-20 06:00:05,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:00:05,890 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)] === [2022-07-20 06:00:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:00:05,890 INFO L85 PathProgramCache]: Analyzing trace with hash 998331403, now seen corresponding path program 2 times [2022-07-20 06:00:05,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:00:05,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298107731] [2022-07-20 06:00:05,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:00:05,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:00:05,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:00:05,892 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) [2022-07-20 06:00:05,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-20 06:00:05,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:00:05,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:00:05,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 06:00:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:06,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:00:06,066 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:06,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:06,105 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 [2022-07-20 06:00:08,177 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 [2022-07-20 06:00:08,255 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 06:00:08,255 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 [2022-07-20 06:00:10,300 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 [2022-07-20 06:00:10,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 06:00:10,476 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 [2022-07-20 06:00:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-07-20 06:00:10,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:00:10,582 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 [2022-07-20 06:00:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:00:11,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:00:11,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298107731] [2022-07-20 06:00:11,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298107731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:00:11,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:00:11,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-07-20 06:00:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132562765] [2022-07-20 06:00:11,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:00:11,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 06:00:11,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:00:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 06:00:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=588, Unknown=2, NotChecked=98, Total=756 [2022-07-20 06:00:11,249 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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) [2022-07-20 06:00:26,413 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 [] [2022-07-20 06:00:29,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 06:00:32,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 06:00:34,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 06:00:36,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 06:00:36,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:00:36,629 INFO L93 Difference]: Finished difference Result 171 states and 195 transitions. [2022-07-20 06:00:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 06:00:36,629 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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 [2022-07-20 06:00:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:00:36,630 INFO L225 Difference]: With dead ends: 171 [2022-07-20 06:00:36,630 INFO L226 Difference]: Without dead ends: 171 [2022-07-20 06:00:36,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=290, Invalid=2794, Unknown=4, NotChecked=218, Total=3306 [2022-07-20 06:00:36,631 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 42 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:00:36,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 505 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 946 Invalid, 5 Unknown, 347 Unchecked, 11.3s Time] [2022-07-20 06:00:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-20 06:00:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 147. [2022-07-20 06:00:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 128 states have internal predecessors, (142), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-20 06:00:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2022-07-20 06:00:36,635 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 54 [2022-07-20 06:00:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:00:36,639 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2022-07-20 06:00:36,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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) [2022-07-20 06:00:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2022-07-20 06:00:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 06:00:36,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:00:36,640 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:00:36,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-20 06:00:36,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:00:36,848 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)] === [2022-07-20 06:00:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:00:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1999848787, now seen corresponding path program 4 times [2022-07-20 06:00:36,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:00:36,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678201038] [2022-07-20 06:00:36,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 06:00:36,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:00:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:00:36,850 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:00:36,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-20 06:00:36,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 06:00:36,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:00:36,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 06:00:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:36,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:00:36,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:00:39,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:39,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:39,188 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:39,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:41,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:41,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:41,343 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:41,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:41,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:41,528 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:41,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:41,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:41,705 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:41,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:41,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:41,924 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:41,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 06:00:41,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:00:44,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:00:44,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678201038] [2022-07-20 06:00:44,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678201038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:00:44,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [279059918] [2022-07-20 06:00:44,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 06:00:44,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:00:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:00:44,832 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) [2022-07-20 06:00:44,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-20 06:00:45,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 06:00:45,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:00:45,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 06:00:45,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:45,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:00:45,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:00:47,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:47,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:47,200 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:47,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:47,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:47,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:47,299 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:47,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:47,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:47,430 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:47,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:49,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:49,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:49,561 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:49,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:00:49,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:00:49,692 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:00:49,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 06:00:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 06:00:49,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:00:52,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [279059918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:00:52,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:00:52,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2022-07-20 06:00:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006055778] [2022-07-20 06:00:52,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:00:52,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 06:00:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:00:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 06:00:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=354, Unknown=2, NotChecked=0, Total=420 [2022-07-20 06:00:52,780 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 18 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) [2022-07-20 06:00:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:00:53,444 INFO L93 Difference]: Finished difference Result 235 states and 264 transitions. [2022-07-20 06:00:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 06:00:53,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 18 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 [2022-07-20 06:00:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:00:53,445 INFO L225 Difference]: With dead ends: 235 [2022-07-20 06:00:53,445 INFO L226 Difference]: Without dead ends: 235 [2022-07-20 06:00:53,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=73, Invalid=431, Unknown=2, NotChecked=0, Total=506 [2022-07-20 06:00:53,446 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 122 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:00:53,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 560 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 645 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-07-20 06:00:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-20 06:00:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 147. [2022-07-20 06:00:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.1557377049180328) internal successors, (141), 128 states have internal predecessors, (141), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-20 06:00:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-07-20 06:00:53,449 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 58 [2022-07-20 06:00:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:00:53,449 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-07-20 06:00:53,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 18 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) [2022-07-20 06:00:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-07-20 06:00:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 06:00:53,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:00:53,450 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] [2022-07-20 06:00:53,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-20 06:00:53,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-07-20 06:00:53,850 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 [2022-07-20 06:00:53,851 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)] === [2022-07-20 06:00:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:00:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1618774478, now seen corresponding path program 2 times [2022-07-20 06:00:53,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:00:53,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650163392] [2022-07-20 06:00:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:00:53,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:00:53,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:00:53,852 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:00:53,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-20 06:00:53,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:00:53,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:00:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 06:00:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:00:54,170 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 [2022-07-20 06:00:54,285 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:00:54,285 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 [2022-07-20 06:00:54,589 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:00:54,590 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 [2022-07-20 06:00:54,810 INFO L356 Elim1Store]: treesize reduction 39, result has 13.3 percent of original size [2022-07-20 06:00:54,811 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 [2022-07-20 06:00:57,743 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-20 06:00:57,743 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 [2022-07-20 06:01:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:01:14,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:01:15,978 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 [2022-07-20 06:01:15,987 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 [2022-07-20 06:01:18,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:01:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650163392] [2022-07-20 06:01:18,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650163392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:01:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033319078] [2022-07-20 06:01:18,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:01:18,864 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:01:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:01:18,866 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) [2022-07-20 06:01:18,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-20 06:01:19,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:01:19,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:01:19,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-20 06:01:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:01:26,038 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 [2022-07-20 06:01:26,446 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-20 06:01:26,447 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 [2022-07-20 06:01:39,316 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 06:01:39,317 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 [2022-07-20 06:01:40,018 INFO L356 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2022-07-20 06:01:40,018 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 [2022-07-20 06:01:42,064 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-20 06:01:42,065 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 [2022-07-20 06:01:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 06:01:53,225 INFO L328 TraceCheckSpWp]: Computing backward predicates...