./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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_test15-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:33:26,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:33:26,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:33:26,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:33:26,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:33:26,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:33:26,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:33:26,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:33:26,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:33:26,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:33:26,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:33:26,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:33:26,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:33:26,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:33:26,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:33:26,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:33:26,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:33:26,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:33:26,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:33:26,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:33:26,932 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:33:26,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:33:26,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:33:26,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:33:26,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:33:26,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:33:26,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:33:26,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:33:26,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:33:26,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:33:26,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:33:26,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:33:26,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:33:26,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:33:26,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:33:26,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:33:26,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:33:26,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:33:26,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:33:26,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:33:26,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:33:26,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:33:26,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:33:26,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:33:26,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:33:26,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:33:26,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:33:26,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:33:26,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:33:26,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:33:26,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:33:26,980 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:33:26,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:33:26,981 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:33:26,981 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:33:26,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:33:26,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:33:26,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:33:26,982 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:33:26,982 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:33:26,982 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:33:26,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:33:26,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:33:26,983 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:33:26,984 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:33:26,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:33:26,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:33:26,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:33:26,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:33:26,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:33:26,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:33:26,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:33:26,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:33:26,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a [2022-07-14 06:33:27,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:33:27,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:33:27,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:33:27,210 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:33:27,211 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:33:27,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-14 06:33:27,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd589ac2/5b75a25f22524236a7ea73e8520c12cb/FLAGe8831d3ef [2022-07-14 06:33:27,718 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:33:27,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-14 06:33:27,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd589ac2/5b75a25f22524236a7ea73e8520c12cb/FLAGe8831d3ef [2022-07-14 06:33:28,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd589ac2/5b75a25f22524236a7ea73e8520c12cb [2022-07-14 06:33:28,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:33:28,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:33:28,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:33:28,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:33:28,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:33:28,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:33:28" (1/1) ... [2022-07-14 06:33:28,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af9a5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:28, skipping insertion in model container [2022-07-14 06:33:28,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:33:28" (1/1) ... [2022-07-14 06:33:28,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:33:28,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:33:28,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:33:28,587 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) [2022-07-14 06:33:28,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17d91238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:28, skipping insertion in model container [2022-07-14 06:33:28,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:33:28,588 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:33:28,589 INFO L158 Benchmark]: Toolchain (without parser) took 333.48ms. Allocated memory is still 88.1MB. Free memory was 56.3MB in the beginning and 58.7MB in the end (delta: -2.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-14 06:33:28,590 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 44.6MB in the beginning and 44.6MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:33:28,603 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.72ms. Allocated memory is still 88.1MB. Free memory was 56.1MB in the beginning and 58.7MB in the end (delta: -2.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-14 06:33:28,604 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 88.1MB. Free memory was 44.6MB in the beginning and 44.6MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.72ms. Allocated memory is still 88.1MB. Free memory was 56.1MB in the beginning and 58.7MB in the end (delta: -2.6MB). 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_test15-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:33:30,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:33:30,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:33:30,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:33:30,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:33:30,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:33:30,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:33:30,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:33:30,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:33:30,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:33:30,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:33:30,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:33:30,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:33:30,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:33:30,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:33:30,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:33:30,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:33:30,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:33:30,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:33:30,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:33:30,293 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:33:30,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:33:30,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:33:30,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:33:30,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:33:30,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:33:30,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:33:30,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:33:30,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:33:30,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:33:30,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:33:30,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:33:30,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:33:30,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:33:30,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:33:30,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:33:30,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:33:30,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:33:30,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:33:30,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:33:30,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:33:30,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:33:30,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:33:30,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:33:30,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:33:30,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:33:30,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:33:30,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:33:30,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:33:30,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:33:30,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:33:30,347 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:33:30,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:33:30,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:33:30,348 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:33:30,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:33:30,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:33:30,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:33:30,348 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:33:30,348 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:33:30,349 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:33:30,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:33:30,349 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:33:30,349 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:33:30,349 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:33:30,349 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:33:30,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:33:30,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:33:30,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:33:30,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:33:30,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:33:30,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:33:30,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:33:30,351 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:33:30,351 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:33:30,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:33:30,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a [2022-07-14 06:33:30,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:33:30,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:33:30,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:33:30,648 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:33:30,649 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:33:30,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-14 06:33:30,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f6e54bb8/bf288e9ef77d4ba396962a2168f2737c/FLAG489808d26 [2022-07-14 06:33:31,087 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:33:31,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2022-07-14 06:33:31,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f6e54bb8/bf288e9ef77d4ba396962a2168f2737c/FLAG489808d26 [2022-07-14 06:33:31,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f6e54bb8/bf288e9ef77d4ba396962a2168f2737c [2022-07-14 06:33:31,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:33:31,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:33:31,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:33:31,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:33:31,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:33:31,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:31,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab9f425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31, skipping insertion in model container [2022-07-14 06:33:31,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:31,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:33:31,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:33:31,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:33:31,840 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:33:31,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:33:31,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:33:31,888 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:33:31,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:33:31,954 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:33:31,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31 WrapperNode [2022-07-14 06:33:31,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:33:31,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:33:31,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:33:31,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:33:31,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:31,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,032 INFO L137 Inliner]: procedures = 176, calls = 103, calls flagged for inlining = 31, calls inlined = 14, statements flattened = 170 [2022-07-14 06:33:32,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:33:32,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:33:32,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:33:32,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:33:32,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:33:32,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:33:32,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:33:32,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:33:32,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (1/1) ... [2022-07-14 06:33:32,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:33:32,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:33:32,113 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) [2022-07-14 06:33:32,115 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 [2022-07-14 06:33:32,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-14 06:33:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:33:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:33:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:33:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:33:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-14 06:33:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:33:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:33:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:33:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-14 06:33:32,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-14 06:33:32,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:33:32,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:33:32,311 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:33:32,312 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:33:32,642 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:33:32,647 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:33:32,648 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-14 06:33:32,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:33:32 BoogieIcfgContainer [2022-07-14 06:33:32,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:33:32,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:33:32,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:33:32,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:33:32,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:33:31" (1/3) ... [2022-07-14 06:33:32,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12137269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:33:32, skipping insertion in model container [2022-07-14 06:33:32,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:33:31" (2/3) ... [2022-07-14 06:33:32,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12137269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:33:32, skipping insertion in model container [2022-07-14 06:33:32,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:33:32" (3/3) ... [2022-07-14 06:33:32,656 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test15-1.i [2022-07-14 06:33:32,666 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:33:32,666 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2022-07-14 06:33:32,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:33:32,718 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@604d29d3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37625af7 [2022-07-14 06:33:32,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-07-14 06:33:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 73 states have (on average 1.821917808219178) internal successors, (133), 123 states have internal predecessors, (133), 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) [2022-07-14 06:33:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:33:32,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:32,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:32,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash -599633160, now seen corresponding path program 1 times [2022-07-14 06:33:32,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:32,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862756283] [2022-07-14 06:33:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:32,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:32,744 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) [2022-07-14 06:33:32,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:33:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:33:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:33:32,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:32,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:32,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862756283] [2022-07-14 06:33:32,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862756283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:32,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:32,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:33:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145369359] [2022-07-14 06:33:32,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:33:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:33:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:33:32,968 INFO L87 Difference]: Start difference. First operand has 129 states, 73 states have (on average 1.821917808219178) internal successors, (133), 123 states have internal predecessors, (133), 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) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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) [2022-07-14 06:33:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:33,080 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2022-07-14 06:33:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:33:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 [2022-07-14 06:33:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:33,087 INFO L225 Difference]: With dead ends: 129 [2022-07-14 06:33:33,088 INFO L226 Difference]: Without dead ends: 127 [2022-07-14 06:33:33,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:33:33,091 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 128 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:33,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 511 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:33:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-14 06:33:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-14 06:33:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 72 states have (on average 1.8055555555555556) internal successors, (130), 121 states have internal predecessors, (130), 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) [2022-07-14 06:33:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2022-07-14 06:33:33,119 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 11 [2022-07-14 06:33:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:33,120 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2022-07-14 06:33:33,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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) [2022-07-14 06:33:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2022-07-14 06:33:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:33:33,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:33,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:33,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:33,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 518474697, now seen corresponding path program 1 times [2022-07-14 06:33:33,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:33,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730252503] [2022-07-14 06:33:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:33,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:33,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:33,332 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) [2022-07-14 06:33:33,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:33:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:33:33,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:33,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:33,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:33,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730252503] [2022-07-14 06:33:33,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730252503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:33,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:33,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:33:33,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625720175] [2022-07-14 06:33:33,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:33,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:33:33,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:33:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:33:33,429 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-07-14 06:33:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:33,523 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-07-14 06:33:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:33:33,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-14 06:33:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:33,525 INFO L225 Difference]: With dead ends: 127 [2022-07-14 06:33:33,525 INFO L226 Difference]: Without dead ends: 127 [2022-07-14 06:33:33,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:33:33,526 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 123 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:33,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 470 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:33:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-14 06:33:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-14 06:33:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 72 states have (on average 1.7916666666666667) internal successors, (129), 121 states have internal predecessors, (129), 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) [2022-07-14 06:33:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2022-07-14 06:33:33,533 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 17 [2022-07-14 06:33:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:33,534 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2022-07-14 06:33:33,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-07-14 06:33:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2022-07-14 06:33:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:33:33,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:33,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:33,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-14 06:33:33,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:33,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash -222458304, now seen corresponding path program 1 times [2022-07-14 06:33:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:33,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881001660] [2022-07-14 06:33:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:33,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:33,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:33,745 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) [2022-07-14 06:33:33,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:33:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:33:33,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:33,836 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 [2022-07-14 06:33:33,927 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:33:33,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:33:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:33,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:34,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881001660] [2022-07-14 06:33:34,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881001660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:33:34,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:33:34,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-14 06:33:34,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042435938] [2022-07-14 06:33:34,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:33:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:33:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:33:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:33:34,088 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:33:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:34,379 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2022-07-14 06:33:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:33:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2022-07-14 06:33:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:34,380 INFO L225 Difference]: With dead ends: 161 [2022-07-14 06:33:34,380 INFO L226 Difference]: Without dead ends: 161 [2022-07-14 06:33:34,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:33:34,381 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 77 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:34,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 582 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 288 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-07-14 06:33:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-14 06:33:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 140. [2022-07-14 06:33:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 88 states have (on average 1.75) internal successors, (154), 134 states have internal predecessors, (154), 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) [2022-07-14 06:33:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2022-07-14 06:33:34,388 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 22 [2022-07-14 06:33:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:34,388 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2022-07-14 06:33:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:33:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2022-07-14 06:33:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:33:34,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:34,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:34,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:34,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:34,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash -222458303, now seen corresponding path program 1 times [2022-07-14 06:33:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:34,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365673399] [2022-07-14 06:33:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:34,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:34,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:34,599 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) [2022-07-14 06:33:34,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:33:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:34,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:33:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:34,696 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 [2022-07-14 06:33:34,700 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 [2022-07-14 06:33:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:34,829 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 [2022-07-14 06:33:34,836 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:34,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:33:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:34,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:37,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365673399] [2022-07-14 06:33:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365673399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:33:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1579614117] [2022-07-14 06:33:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:37,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:33:37,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:33:37,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:33:37,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-07-14 06:33:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:37,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:33:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:37,198 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 [2022-07-14 06:33:37,203 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 [2022-07-14 06:33:39,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:39,328 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 [2022-07-14 06:33:39,341 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:39,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:33:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:39,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:41,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1579614117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:33:41,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:33:41,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-14 06:33:41,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611564653] [2022-07-14 06:33:41,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:33:41,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:33:41,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:33:41,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-14 06:33:41,600 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-14 06:33:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:42,257 INFO L93 Difference]: Finished difference Result 180 states and 192 transitions. [2022-07-14 06:33:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:33:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 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 22 [2022-07-14 06:33:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:42,258 INFO L225 Difference]: With dead ends: 180 [2022-07-14 06:33:42,258 INFO L226 Difference]: Without dead ends: 180 [2022-07-14 06:33:42,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2022-07-14 06:33:42,259 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 161 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:42,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 464 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 351 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-07-14 06:33:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-14 06:33:42,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 151. [2022-07-14 06:33:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 102 states have (on average 1.6862745098039216) internal successors, (172), 145 states have internal predecessors, (172), 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) [2022-07-14 06:33:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2022-07-14 06:33:42,266 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 22 [2022-07-14 06:33:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:42,266 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2022-07-14 06:33:42,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-14 06:33:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2022-07-14 06:33:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:33:42,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:42,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:42,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-14 06:33:42,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-07-14 06:33:42,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:33:42,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash -126280059, now seen corresponding path program 1 times [2022-07-14 06:33:42,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:42,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830489541] [2022-07-14 06:33:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:42,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:42,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:42,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:33:42,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:33:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:42,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:33:42,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:42,768 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 [2022-07-14 06:33:42,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:33:42,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 06:33:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:33:42,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:42,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:42,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830489541] [2022-07-14 06:33:42,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830489541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:42,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:42,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:33:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971924897] [2022-07-14 06:33:42,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:42,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:33:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:33:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:33:42,850 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:33:43,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:43,315 INFO L93 Difference]: Finished difference Result 151 states and 179 transitions. [2022-07-14 06:33:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:33:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-14 06:33:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:43,316 INFO L225 Difference]: With dead ends: 151 [2022-07-14 06:33:43,316 INFO L226 Difference]: Without dead ends: 151 [2022-07-14 06:33:43,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:33:43,317 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 10 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:43,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 494 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:33:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-14 06:33:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-07-14 06:33:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 102 states have (on average 1.6764705882352942) internal successors, (171), 144 states have internal predecessors, (171), 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) [2022-07-14 06:33:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 179 transitions. [2022-07-14 06:33:43,332 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 179 transitions. Word has length 27 [2022-07-14 06:33:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:43,334 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 179 transitions. [2022-07-14 06:33:43,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:33:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 179 transitions. [2022-07-14 06:33:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:33:43,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:43,335 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:43,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-14 06:33:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:43,537 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:43,538 INFO L85 PathProgramCache]: Analyzing trace with hash -126280058, now seen corresponding path program 1 times [2022-07-14 06:33:43,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:43,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780866553] [2022-07-14 06:33:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:43,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:43,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:43,541 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) [2022-07-14 06:33:43,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:33:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:43,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:33:43,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:43,669 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 [2022-07-14 06:33:43,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:33:43,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:33:43,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-14 06:33:43,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 06:33:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:33:43,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:43,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:43,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780866553] [2022-07-14 06:33:43,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780866553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:43,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:43,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:33:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444604345] [2022-07-14 06:33:43,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:43,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:33:43,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:43,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:33:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:33:43,865 INFO L87 Difference]: Start difference. First operand 150 states and 179 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:33:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:44,385 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2022-07-14 06:33:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:33:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-14 06:33:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:44,386 INFO L225 Difference]: With dead ends: 159 [2022-07-14 06:33:44,386 INFO L226 Difference]: Without dead ends: 159 [2022-07-14 06:33:44,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:33:44,387 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 17 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:44,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 533 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:33:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-14 06:33:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2022-07-14 06:33:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 143 states have internal predecessors, (170), 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) [2022-07-14 06:33:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2022-07-14 06:33:44,392 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 27 [2022-07-14 06:33:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:44,392 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2022-07-14 06:33:44,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:33:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2022-07-14 06:33:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:33:44,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:44,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:44,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:44,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:44,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash -126277696, now seen corresponding path program 1 times [2022-07-14 06:33:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:44,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120516472] [2022-07-14 06:33:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:44,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:44,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:44,595 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) [2022-07-14 06:33:44,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:33:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:33:44,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:44,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:33:44,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-14 06:33:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:33:44,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:33:44,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120516472] [2022-07-14 06:33:44,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120516472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:33:44,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:33:44,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:33:44,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89465786] [2022-07-14 06:33:44,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:33:44,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:33:44,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:33:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:33:44,751 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:33:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:44,908 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2022-07-14 06:33:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:33:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-14 06:33:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:44,909 INFO L225 Difference]: With dead ends: 146 [2022-07-14 06:33:44,909 INFO L226 Difference]: Without dead ends: 146 [2022-07-14 06:33:44,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:33:44,910 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 5 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:44,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 697 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:33:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-14 06:33:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-07-14 06:33:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 140 states have internal predecessors, (165), 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) [2022-07-14 06:33:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2022-07-14 06:33:44,914 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 27 [2022-07-14 06:33:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:44,914 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2022-07-14 06:33:44,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:33:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2022-07-14 06:33:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:33:44,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:44,923 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:44,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:33:45,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:45,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:45,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1096052090, now seen corresponding path program 1 times [2022-07-14 06:33:45,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:45,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017194679] [2022-07-14 06:33:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:45,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:45,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:45,133 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) [2022-07-14 06:33:45,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:33:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:45,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:33:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:45,226 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 [2022-07-14 06:33:45,377 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:33:45,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:33:49,476 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:33:49,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-14 06:33:49,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:33:49,558 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 11 treesize of output 5 [2022-07-14 06:33:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:49,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:33:49,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017194679] [2022-07-14 06:33:49,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017194679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:33:49,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:33:49,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 12 [2022-07-14 06:33:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946151418] [2022-07-14 06:33:49,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:33:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:33:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:33:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:33:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2022-07-14 06:33:49,860 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:33:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:33:56,414 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2022-07-14 06:33:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:33:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-07-14 06:33:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:33:56,415 INFO L225 Difference]: With dead ends: 166 [2022-07-14 06:33:56,415 INFO L226 Difference]: Without dead ends: 166 [2022-07-14 06:33:56,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=56, Invalid=213, Unknown=3, NotChecked=0, Total=272 [2022-07-14 06:33:56,416 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 64 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:33:56,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 648 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 348 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-07-14 06:33:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-14 06:33:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2022-07-14 06:33:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.6372549019607843) internal successors, (167), 142 states have internal predecessors, (167), 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) [2022-07-14 06:33:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2022-07-14 06:33:56,421 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 29 [2022-07-14 06:33:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:33:56,422 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2022-07-14 06:33:56,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:33:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2022-07-14 06:33:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:33:56,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:33:56,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:33:56,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-14 06:33:56,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:33:56,629 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:33:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:33:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1096052089, now seen corresponding path program 1 times [2022-07-14 06:33:56,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:33:56,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961880394] [2022-07-14 06:33:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:56,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:33:56,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:33:56,633 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) [2022-07-14 06:33:56,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:33:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:56,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:33:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:56,746 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 [2022-07-14 06:33:56,751 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 [2022-07-14 06:33:56,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:56,938 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 [2022-07-14 06:33:56,961 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:33:56,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:33:57,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:57,045 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 [2022-07-14 06:33:57,054 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:57,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:33:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:57,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:33:59,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:33:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961880394] [2022-07-14 06:33:59,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961880394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:33:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1936152433] [2022-07-14 06:33:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:33:59,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:33:59,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:33:59,522 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:33:59,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-07-14 06:33:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:33:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:33:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:33:59,686 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 [2022-07-14 06:33:59,697 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 [2022-07-14 06:33:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:59,816 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 [2022-07-14 06:33:59,833 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:33:59,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:33:59,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:33:59,919 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 [2022-07-14 06:33:59,926 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:33:59,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:33:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:33:59,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:34:02,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1936152433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:34:02,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:34:02,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-14 06:34:02,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511619267] [2022-07-14 06:34:02,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:34:02,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:34:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:34:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:34:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2022-07-14 06:34:02,219 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-07-14 06:34:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:34:02,818 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2022-07-14 06:34:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:34:02,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 29 [2022-07-14 06:34:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:34:02,820 INFO L225 Difference]: With dead ends: 181 [2022-07-14 06:34:02,820 INFO L226 Difference]: Without dead ends: 181 [2022-07-14 06:34:02,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=36, Invalid=145, Unknown=1, NotChecked=0, Total=182 [2022-07-14 06:34:02,820 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 81 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:34:02,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 485 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 381 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-07-14 06:34:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-14 06:34:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 151. [2022-07-14 06:34:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 105 states have (on average 1.6285714285714286) internal successors, (171), 144 states have internal predecessors, (171), 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) [2022-07-14 06:34:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2022-07-14 06:34:02,831 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 29 [2022-07-14 06:34:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:34:02,831 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2022-07-14 06:34:02,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-07-14 06:34:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2022-07-14 06:34:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:34:02,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:34:02,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:34:02,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:03,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:03,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:34:03,243 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:34:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:34:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1039070521, now seen corresponding path program 1 times [2022-07-14 06:34:03,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:34:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10852966] [2022-07-14 06:34:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:34:03,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:34:03,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:34:03,245 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) [2022-07-14 06:34:03,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:34:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:34:03,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:34:03,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:34:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:34:03,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:34:03,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:34:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10852966] [2022-07-14 06:34:03,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10852966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:34:03,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:34:03,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:34:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708052448] [2022-07-14 06:34:03,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:34:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:34:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:34:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:34:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:34:03,345 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:34:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:34:03,496 INFO L93 Difference]: Finished difference Result 167 states and 184 transitions. [2022-07-14 06:34:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:34:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-14 06:34:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:34:03,497 INFO L225 Difference]: With dead ends: 167 [2022-07-14 06:34:03,497 INFO L226 Difference]: Without dead ends: 167 [2022-07-14 06:34:03,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:34:03,498 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 109 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:34:03,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 238 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:34:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-14 06:34:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2022-07-14 06:34:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 105 states have (on average 1.619047619047619) internal successors, (170), 143 states have internal predecessors, (170), 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) [2022-07-14 06:34:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 178 transitions. [2022-07-14 06:34:03,501 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 178 transitions. Word has length 31 [2022-07-14 06:34:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:34:03,501 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 178 transitions. [2022-07-14 06:34:03,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:34:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 178 transitions. [2022-07-14 06:34:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:34:03,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:34:03,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:34:03,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:03,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:34:03,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:34:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:34:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1039070520, now seen corresponding path program 1 times [2022-07-14 06:34:03,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:34:03,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855458739] [2022-07-14 06:34:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:34:03,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:34:03,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:34:03,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:34:03,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:34:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:34:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:34:03,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:34:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:34:03,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:34:04,002 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 [2022-07-14 06:34:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:34:04,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:34:04,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855458739] [2022-07-14 06:34:04,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855458739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:34:04,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:34:04,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-14 06:34:04,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488989751] [2022-07-14 06:34:04,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:34:04,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:34:04,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:34:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:34:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:34:04,195 INFO L87 Difference]: Start difference. First operand 150 states and 178 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:34:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:34:04,889 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2022-07-14 06:34:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:34:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2022-07-14 06:34:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:34:04,891 INFO L225 Difference]: With dead ends: 172 [2022-07-14 06:34:04,891 INFO L226 Difference]: Without dead ends: 172 [2022-07-14 06:34:04,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:34:04,891 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 444 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:34:04,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 679 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:34:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-14 06:34:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2022-07-14 06:34:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.5980392156862746) internal successors, (163), 138 states have internal predecessors, (163), 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) [2022-07-14 06:34:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2022-07-14 06:34:04,894 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 31 [2022-07-14 06:34:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:34:04,895 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2022-07-14 06:34:04,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:34:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2022-07-14 06:34:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:34:04,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:34:04,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:34:04,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:05,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:34:05,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:34:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:34:05,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2114357432, now seen corresponding path program 1 times [2022-07-14 06:34:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:34:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063725199] [2022-07-14 06:34:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:34:05,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:34:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:34:05,120 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) [2022-07-14 06:34:05,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:34:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:34:05,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 06:34:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:34:05,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:05,386 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 [2022-07-14 06:34:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:34:05,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:34:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:34:05,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:34:05,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063725199] [2022-07-14 06:34:05,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063725199] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-14 06:34:05,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:34:05,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2022-07-14 06:34:05,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107706688] [2022-07-14 06:34:05,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:34:05,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:34:05,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:34:05,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:34:05,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:34:05,536 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:34:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:34:06,109 INFO L93 Difference]: Finished difference Result 161 states and 176 transitions. [2022-07-14 06:34:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:34:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-07-14 06:34:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:34:06,110 INFO L225 Difference]: With dead ends: 161 [2022-07-14 06:34:06,110 INFO L226 Difference]: Without dead ends: 161 [2022-07-14 06:34:06,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:34:06,110 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 127 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:34:06,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 437 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:34:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-14 06:34:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2022-07-14 06:34:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 102 states have (on average 1.588235294117647) internal successors, (162), 137 states have internal predecessors, (162), 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) [2022-07-14 06:34:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2022-07-14 06:34:06,113 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 33 [2022-07-14 06:34:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:34:06,113 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2022-07-14 06:34:06,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:34:06,114 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2022-07-14 06:34:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:34:06,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:34:06,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:34:06,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:06,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:34:06,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:34:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:34:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2114357431, now seen corresponding path program 1 times [2022-07-14 06:34:06,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:34:06,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916346350] [2022-07-14 06:34:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:34:06,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:34:06,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:34:06,328 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:34:06,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:34:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:34:06,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 06:34:06,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:34:06,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:06,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:06,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-14 06:34:06,796 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 [2022-07-14 06:34:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:34:06,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:34:07,295 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 [2022-07-14 06:34:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:34:07,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:34:07,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916346350] [2022-07-14 06:34:07,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916346350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:34:07,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:34:07,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2022-07-14 06:34:07,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549074710] [2022-07-14 06:34:07,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:34:07,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:34:07,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:34:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:34:07,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:34:07,587 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:34:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:34:09,277 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2022-07-14 06:34:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:34:09,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 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 33 [2022-07-14 06:34:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:34:09,279 INFO L225 Difference]: With dead ends: 169 [2022-07-14 06:34:09,279 INFO L226 Difference]: Without dead ends: 169 [2022-07-14 06:34:09,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:34:09,279 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 533 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:34:09,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1084 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-14 06:34:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-14 06:34:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2022-07-14 06:34:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 98 states have (on average 1.5612244897959184) internal successors, (153), 131 states have internal predecessors, (153), 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) [2022-07-14 06:34:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2022-07-14 06:34:09,282 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 33 [2022-07-14 06:34:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:34:09,282 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2022-07-14 06:34:09,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:34:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2022-07-14 06:34:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:34:09,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:34:09,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:34:09,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:09,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:34:09,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:34:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:34:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1120570930, now seen corresponding path program 1 times [2022-07-14 06:34:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:34:09,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745507222] [2022-07-14 06:34:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:34:09,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:34:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:34:09,485 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) [2022-07-14 06:34:09,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:34:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:34:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-14 06:34:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:34:09,618 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 [2022-07-14 06:34:09,741 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:34:09,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:34:09,881 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:34:09,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 40 [2022-07-14 06:34:09,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:10,321 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:34:10,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-07-14 06:34:10,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:10,395 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 39 treesize of output 30 [2022-07-14 06:34:10,626 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 [2022-07-14 06:34:10,806 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:10,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 31 [2022-07-14 06:34:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:34:10,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:34:11,249 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_345))) (store .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (_ bv1 1))) is different from false [2022-07-14 06:34:11,266 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1) v_ArrVal_345))) (store .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1))) (_ bv1 1))) is different from false [2022-07-14 06:34:11,295 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:11,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-14 06:34:11,314 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:11,314 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 272 treesize of output 264 [2022-07-14 06:34:11,336 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 284 treesize of output 264 [2022-07-14 06:34:13,958 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 128 treesize of output 112 [2022-07-14 06:34:21,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:34:21,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745507222] [2022-07-14 06:34:21,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745507222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:34:21,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [58889557] [2022-07-14 06:34:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:34:21,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:34:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:34:21,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:34:21,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-14 06:34:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:34:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-14 06:34:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:34:21,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:34:21,415 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:34:21,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:34:21,499 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:34:21,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 40 [2022-07-14 06:34:21,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:21,646 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:34:21,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-07-14 06:34:21,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:21,715 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 39 treesize of output 30 [2022-07-14 06:34:21,766 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 [2022-07-14 06:34:21,811 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:21,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 31 [2022-07-14 06:34:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:34:21,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:34:22,130 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_383 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1) v_ArrVal_383))) (store .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse0 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse1))) (_ bv1 1))) is different from false [2022-07-14 06:34:22,161 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:22,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-14 06:34:22,176 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:22,176 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 360 treesize of output 350 [2022-07-14 06:34:22,184 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 406 treesize of output 374 [2022-07-14 06:34:28,164 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 134 treesize of output 118 [2022-07-14 06:34:31,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [58889557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:34:31,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:34:31,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2022-07-14 06:34:31,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472697044] [2022-07-14 06:34:31,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:34:31,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:34:31,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:34:31,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:34:31,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=783, Unknown=9, NotChecked=174, Total=1056 [2022-07-14 06:34:31,117 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:34:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:34:32,986 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2022-07-14 06:34:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:34:32,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-07-14 06:34:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:34:32,987 INFO L225 Difference]: With dead ends: 137 [2022-07-14 06:34:32,988 INFO L226 Difference]: Without dead ends: 137 [2022-07-14 06:34:32,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=143, Invalid=1050, Unknown=9, NotChecked=204, Total=1406 [2022-07-14 06:34:32,988 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 20 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:34:32,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 979 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 580 Invalid, 0 Unknown, 155 Unchecked, 1.0s Time] [2022-07-14 06:34:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-14 06:34:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-14 06:34:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 98 states have (on average 1.5510204081632653) internal successors, (152), 130 states have internal predecessors, (152), 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) [2022-07-14 06:34:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2022-07-14 06:34:32,992 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 34 [2022-07-14 06:34:32,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:34:32,992 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2022-07-14 06:34:32,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:34:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2022-07-14 06:34:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:34:32,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:34:32,992 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:34:33,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:33,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:34:33,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:34:33,402 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-07-14 06:34:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:34:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1120570929, now seen corresponding path program 1 times [2022-07-14 06:34:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:34:33,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622679784] [2022-07-14 06:34:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:34:33,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:34:33,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:34:33,405 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) [2022-07-14 06:34:33,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:34:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:34:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-14 06:34:33,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:34:33,535 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 [2022-07-14 06:34:33,675 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:34:33,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-14 06:34:33,771 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 [2022-07-14 06:34:33,861 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:34:33,861 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 17 treesize of output 19 [2022-07-14 06:34:33,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:33,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:34:34,169 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:34:34,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-07-14 06:34:34,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-14 06:34:34,219 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 39 treesize of output 30 [2022-07-14 06:34:34,232 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 27 treesize of output 26 [2022-07-14 06:34:34,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:34:34,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:34:34,737 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:34,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-07-14 06:34:34,770 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:34:34,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-14 06:34:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:34:34,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:34:36,044 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_423))) (store .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) (bvule (bvadd (_ bv7 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_424 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32))) (.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_423))) (store .cse2 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse2 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse4)) (select |c_#length| (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem57#1.base| v_ArrVal_424))) (store .cse5 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse5 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse3 |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse4)))))) is different from false [2022-07-14 06:34:36,107 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse2) v_ArrVal_423))) (store .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse1 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32)) (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse2)))) (bvule (bvadd .cse0 (_ bv7 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_423 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_424 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|))) (let ((.cse4 (bvadd |c_ULTIMATE.start_entry_point_~hdev~0#1.offset| (_ bv8 32))) (.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse6))) (bvule (bvadd (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| .cse5 v_ArrVal_423))) (store .cse3 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse3 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse4 (bvadd (_ bv8 32) |c_ULTIMATE.start_entry_point_~intf~2#1.offset|)))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse6) (_ bv8 32)) (select |c_#length| (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse5 v_ArrVal_424))) (store .cse7 |c_ULTIMATE.start_entry_point_~hdev~0#1.base| (store (select .cse7 |c_ULTIMATE.start_entry_point_~hdev~0#1.base|) .cse4 |c_ULTIMATE.start_entry_point_~intf~2#1.base|))) |c_ULTIMATE.start_entry_point_~intf~2#1.base|) .cse6))))))) is different from false [2022-07-14 06:34:36,211 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:36,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 84 [2022-07-14 06:34:36,227 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:36,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2022-07-14 06:34:36,281 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:36,281 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 584 treesize of output 576 [2022-07-14 06:34:36,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:34:36,336 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 6144 treesize of output 5958 [2022-07-14 06:34:36,365 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 7118 treesize of output 6734 [2022-07-14 06:34:36,406 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 7654 treesize of output 7254