./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/20020406-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c 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/memsafety/20020406-1.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 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:31:44,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:31:44,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:31:44,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:31:44,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:31:44,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:31:44,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:31:44,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:31:44,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:31:44,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:31:44,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:31:44,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:31:44,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:31:44,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:31:44,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:31:44,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:31:44,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:31:44,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:31:44,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:31:44,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:31:44,292 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:31:44,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:31:44,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:31:44,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:31:44,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:31:44,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:31:44,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:31:44,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:31:44,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:31:44,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:31:44,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:31:44,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:31:44,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:31:44,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:31:44,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:31:44,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:31:44,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:31:44,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:31:44,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:31:44,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:31:44,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:31:44,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:31:44,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:31:44,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:31:44,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:31:44,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:31:44,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:31:44,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:31:44,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:31:44,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:31:44,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:31:44,330 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:31:44,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:31:44,331 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:31:44,331 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:31:44,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:31:44,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:31:44,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:31:44,332 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:31:44,332 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:31:44,332 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:31:44,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:31:44,333 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:31:44,333 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:31:44,333 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:31:44,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:31:44,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:31:44,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:31:44,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:31:44,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:31:44,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:31:44,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:31:44,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:31:44,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2022-07-12 18:31:44,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:31:44,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:31:44,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:31:44,544 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:31:44,544 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:31:44,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2022-07-12 18:31:44,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68e47a37b/dbc2b706c3964fcd95149c92ef97d536/FLAGa73615061 [2022-07-12 18:31:44,962 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:31:44,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2022-07-12 18:31:44,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68e47a37b/dbc2b706c3964fcd95149c92ef97d536/FLAGa73615061 [2022-07-12 18:31:45,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68e47a37b/dbc2b706c3964fcd95149c92ef97d536 [2022-07-12 18:31:45,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:31:45,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:31:45,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:31:45,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:31:45,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:31:45,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:31:45" (1/1) ... [2022-07-12 18:31:45,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15cea23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:45, skipping insertion in model container [2022-07-12 18:31:45,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:31:45" (1/1) ... [2022-07-12 18:31:45,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:31:45,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:31:45,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:31:45,742 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) [2022-07-12 18:31:45,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a06a710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:45, skipping insertion in model container [2022-07-12 18:31:45,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:31:45,743 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:31:45,745 INFO L158 Benchmark]: Toolchain (without parser) took 396.59ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 75.0MB in the beginning and 100.6MB in the end (delta: -25.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:31:45,746 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 107.0MB. Free memory was 63.6MB in the beginning and 63.6MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:31:45,747 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.00ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 74.7MB in the beginning and 100.6MB in the end (delta: -25.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:31:45,749 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 107.0MB. Free memory was 63.6MB in the beginning and 63.6MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 395.00ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 74.7MB in the beginning and 100.6MB in the end (delta: -25.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 897]: 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/memsafety/20020406-1.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 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:31:47,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:31:47,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:31:47,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:31:47,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:31:47,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:31:47,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:31:47,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:31:47,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:31:47,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:31:47,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:31:47,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:31:47,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:31:47,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:31:47,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:31:47,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:31:47,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:31:47,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:31:47,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:31:47,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:31:47,333 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:31:47,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:31:47,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:31:47,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:31:47,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:31:47,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:31:47,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:31:47,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:31:47,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:31:47,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:31:47,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:31:47,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:31:47,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:31:47,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:31:47,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:31:47,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:31:47,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:31:47,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:31:47,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:31:47,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:31:47,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:31:47,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:31:47,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:31:47,367 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:31:47,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:31:47,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:31:47,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:31:47,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:31:47,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:31:47,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:31:47,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:31:47,369 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:31:47,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:31:47,370 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:31:47,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:31:47,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:31:47,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:31:47,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:31:47,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:31:47,371 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:31:47,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:31:47,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:31:47,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:31:47,372 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:31:47,372 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:31:47,372 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:31:47,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:31:47,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:31:47,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:31:47,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:31:47,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:31:47,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:31:47,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:31:47,374 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:31:47,374 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:31:47,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:31:47,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2022-07-12 18:31:47,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:31:47,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:31:47,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:31:47,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:31:47,651 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:31:47,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2022-07-12 18:31:47,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f8cacd2/69dc3a95aa334ecf8ae60ff1fb78e36d/FLAGa5fd1f576 [2022-07-12 18:31:48,087 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:31:48,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2022-07-12 18:31:48,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f8cacd2/69dc3a95aa334ecf8ae60ff1fb78e36d/FLAGa5fd1f576 [2022-07-12 18:31:48,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f8cacd2/69dc3a95aa334ecf8ae60ff1fb78e36d [2022-07-12 18:31:48,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:31:48,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:31:48,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:31:48,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:31:48,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:31:48,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:48,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75781c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48, skipping insertion in model container [2022-07-12 18:31:48,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:48,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:31:48,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:31:48,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:31:48,806 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:31:48,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:31:48,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:31:48,884 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:31:48,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:31:48,977 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:31:48,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48 WrapperNode [2022-07-12 18:31:48,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:31:48,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:31:48,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:31:48,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:31:48,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,044 INFO L137 Inliner]: procedures = 286, calls = 76, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-12 18:31:49,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:31:49,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:31:49,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:31:49,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:31:49,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:31:49,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:31:49,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:31:49,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:31:49,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (1/1) ... [2022-07-12 18:31:49,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:31:49,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:49,135 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) [2022-07-12 18:31:49,139 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 [2022-07-12 18:31:49,174 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFdeg [2022-07-12 18:31:49,174 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFdeg [2022-07-12 18:31:49,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 18:31:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:31:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:31:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFnew [2022-07-12 18:31:49,175 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFnew [2022-07-12 18:31:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFfree [2022-07-12 18:31:49,176 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFfree [2022-07-12 18:31:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFshift_add [2022-07-12 18:31:49,177 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFshift_add [2022-07-12 18:31:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:31:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 18:31:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 18:31:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure FFmul [2022-07-12 18:31:49,177 INFO L138 BoogieDeclarations]: Found implementation of procedure FFmul [2022-07-12 18:31:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFexgcd [2022-07-12 18:31:49,178 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFexgcd [2022-07-12 18:31:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:31:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:31:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:31:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFswap [2022-07-12 18:31:49,178 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFswap [2022-07-12 18:31:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFcopy [2022-07-12 18:31:49,178 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFcopy [2022-07-12 18:31:49,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:31:49,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:31:49,336 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:31:49,349 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:31:49,921 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:31:49,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:31:49,939 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:31:49,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:31:49 BoogieIcfgContainer [2022-07-12 18:31:49,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:31:49,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:31:49,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:31:49,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:31:49,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:31:48" (1/3) ... [2022-07-12 18:31:49,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a475d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:31:49, skipping insertion in model container [2022-07-12 18:31:49,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:31:48" (2/3) ... [2022-07-12 18:31:49,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a475d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:31:49, skipping insertion in model container [2022-07-12 18:31:49,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:31:49" (3/3) ... [2022-07-12 18:31:49,952 INFO L111 eAbstractionObserver]: Analyzing ICFG 20020406-1.i [2022-07-12 18:31:49,965 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:31:49,965 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-07-12 18:31:50,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:31:50,019 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@30be668d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1afd573d [2022-07-12 18:31:50,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-07-12 18:31:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:31:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 18:31:50,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:50,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 18:31:50,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash 228226931, now seen corresponding path program 1 times [2022-07-12 18:31:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:50,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461377484] [2022-07-12 18:31:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:50,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:50,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:50,047 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) [2022-07-12 18:31:50,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:31:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:50,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:31:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:50,191 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 [2022-07-12 18:31:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:50,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:50,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:50,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461377484] [2022-07-12 18:31:50,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461377484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:50,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:50,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:31:50,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902951594] [2022-07-12 18:31:50,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:50,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:31:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:31:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:31:50,242 INFO L87 Difference]: Start difference. First operand has 187 states, 90 states have (on average 1.7333333333333334) internal successors, (156), 146 states have internal predecessors, (156), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:50,442 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2022-07-12 18:31:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:31:50,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-12 18:31:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:50,449 INFO L225 Difference]: With dead ends: 182 [2022-07-12 18:31:50,449 INFO L226 Difference]: Without dead ends: 180 [2022-07-12 18:31:50,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:31:50,452 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:50,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 344 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:31:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-12 18:31:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-07-12 18:31:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 87 states have (on average 1.6781609195402298) internal successors, (146), 139 states have internal predecessors, (146), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:31:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2022-07-12 18:31:50,485 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 5 [2022-07-12 18:31:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:50,485 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2022-07-12 18:31:50,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2022-07-12 18:31:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 18:31:50,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:50,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 18:31:50,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:50,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:50,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash 228226932, now seen corresponding path program 1 times [2022-07-12 18:31:50,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:50,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463565279] [2022-07-12 18:31:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:50,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:50,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:50,700 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) [2022-07-12 18:31:50,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:31:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:50,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:31:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:50,772 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 [2022-07-12 18:31:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:50,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:50,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:50,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463565279] [2022-07-12 18:31:50,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463565279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:50,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:50,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:31:50,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420006266] [2022-07-12 18:31:50,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:50,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:31:50,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:31:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:31:50,790 INFO L87 Difference]: Start difference. First operand 180 states and 216 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:51,038 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-07-12 18:31:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:31:51,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-12 18:31:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:51,042 INFO L225 Difference]: With dead ends: 184 [2022-07-12 18:31:51,042 INFO L226 Difference]: Without dead ends: 184 [2022-07-12 18:31:51,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:31:51,043 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 6 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:51,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:31:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-12 18:31:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2022-07-12 18:31:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 89 states have (on average 1.651685393258427) internal successors, (147), 140 states have internal predecessors, (147), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:31:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 217 transitions. [2022-07-12 18:31:51,061 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 217 transitions. Word has length 5 [2022-07-12 18:31:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:51,061 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 217 transitions. [2022-07-12 18:31:51,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 217 transitions. [2022-07-12 18:31:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:31:51,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:51,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:51,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-12 18:31:51,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:51,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting DUPFFnewErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 282747829, now seen corresponding path program 1 times [2022-07-12 18:31:51,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:51,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734791179] [2022-07-12 18:31:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:51,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:51,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:51,270 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) [2022-07-12 18:31:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:31:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:31:51,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:51,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:31:51,353 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 [2022-07-12 18:31:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:31:51,420 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 [2022-07-12 18:31:51,435 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:31:51,435 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 [2022-07-12 18:31:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:51,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:51,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734791179] [2022-07-12 18:31:51,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734791179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:51,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:51,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:31:51,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395141685] [2022-07-12 18:31:51,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:51,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:31:51,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:31:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:31:51,454 INFO L87 Difference]: Start difference. First operand 181 states and 217 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:51,646 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2022-07-12 18:31:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:31:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:31:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:51,649 INFO L225 Difference]: With dead ends: 177 [2022-07-12 18:31:51,649 INFO L226 Difference]: Without dead ends: 177 [2022-07-12 18:31:51,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:31:51,649 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 33 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:51,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 342 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:31:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-12 18:31:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2022-07-12 18:31:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 87 states have (on average 1.6206896551724137) internal successors, (141), 134 states have internal predecessors, (141), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:31:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2022-07-12 18:31:51,672 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 7 [2022-07-12 18:31:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:51,673 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2022-07-12 18:31:51,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2022-07-12 18:31:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:31:51,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:51,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:51,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:51,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:51,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting DUPFFnewErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1865414411, now seen corresponding path program 1 times [2022-07-12 18:31:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:51,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207226336] [2022-07-12 18:31:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:51,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:51,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:51,888 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) [2022-07-12 18:31:51,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:31:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:51,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:31:51,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:51,980 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 [2022-07-12 18:31:51,991 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 [2022-07-12 18:31:52,004 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 [2022-07-12 18:31:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:52,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:52,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:52,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207226336] [2022-07-12 18:31:52,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207226336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:52,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:52,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:31:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271594538] [2022-07-12 18:31:52,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:52,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:31:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:31:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:31:52,024 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:52,484 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2022-07-12 18:31:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:31:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:31:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:52,487 INFO L225 Difference]: With dead ends: 186 [2022-07-12 18:31:52,487 INFO L226 Difference]: Without dead ends: 186 [2022-07-12 18:31:52,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:31:52,488 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 28 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:52,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 811 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:31:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-12 18:31:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-07-12 18:31:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 87 states have (on average 1.6091954022988506) internal successors, (140), 133 states have internal predecessors, (140), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:31:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2022-07-12 18:31:52,497 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 11 [2022-07-12 18:31:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:52,497 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2022-07-12 18:31:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2022-07-12 18:31:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:31:52,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:52,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:52,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:52,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:52,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1993271845, now seen corresponding path program 1 times [2022-07-12 18:31:52,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:52,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490896643] [2022-07-12 18:31:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:52,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:52,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:52,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:31:52,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:31:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:31:52,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:52,806 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 10 treesize of output 9 [2022-07-12 18:31:52,838 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 [2022-07-12 18:31:52,845 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 [2022-07-12 18:31:52,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:31:52,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-12 18:31:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:52,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:52,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:52,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490896643] [2022-07-12 18:31:52,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490896643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:52,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:52,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:31:52,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43608348] [2022-07-12 18:31:52,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:52,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:31:52,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:31:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:31:52,926 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:53,586 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2022-07-12 18:31:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:31:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:31:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:53,588 INFO L225 Difference]: With dead ends: 197 [2022-07-12 18:31:53,588 INFO L226 Difference]: Without dead ends: 197 [2022-07-12 18:31:53,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:31:53,589 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 50 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:53,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1053 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:31:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-12 18:31:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2022-07-12 18:31:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 102 states have (on average 1.5294117647058822) internal successors, (156), 148 states have internal predecessors, (156), 35 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:31:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2022-07-12 18:31:53,597 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 12 [2022-07-12 18:31:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:53,597 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2022-07-12 18:31:53,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2022-07-12 18:31:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:31:53,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:53,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:53,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:53,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:53,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash 335042805, now seen corresponding path program 1 times [2022-07-12 18:31:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:53,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553796644] [2022-07-12 18:31:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:53,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:53,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:53,805 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) [2022-07-12 18:31:53,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:31:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:31:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:53,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:53,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553796644] [2022-07-12 18:31:53,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553796644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:53,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:53,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:31:53,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833891524] [2022-07-12 18:31:53,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:53,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:31:53,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:31:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:31:53,951 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-07-12 18:31:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:54,095 INFO L93 Difference]: Finished difference Result 209 states and 253 transitions. [2022-07-12 18:31:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:31:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 21 [2022-07-12 18:31:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:54,106 INFO L225 Difference]: With dead ends: 209 [2022-07-12 18:31:54,106 INFO L226 Difference]: Without dead ends: 203 [2022-07-12 18:31:54,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:31:54,107 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 43 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:54,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 757 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:31:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-12 18:31:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2022-07-12 18:31:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 109 states have (on average 1.5045871559633028) internal successors, (164), 156 states have internal predecessors, (164), 35 states have call successors, (35), 9 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-07-12 18:31:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2022-07-12 18:31:54,114 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 21 [2022-07-12 18:31:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:54,115 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2022-07-12 18:31:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-07-12 18:31:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2022-07-12 18:31:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 18:31:54,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:54,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:54,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:54,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:54,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:54,325 INFO L85 PathProgramCache]: Analyzing trace with hash 370721495, now seen corresponding path program 1 times [2022-07-12 18:31:54,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:54,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224012119] [2022-07-12 18:31:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:54,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:54,327 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) [2022-07-12 18:31:54,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:31:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:31:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:54,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:31:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:54,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224012119] [2022-07-12 18:31:54,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224012119] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:31:54,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:31:54,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-12 18:31:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347852259] [2022-07-12 18:31:54,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:31:54,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:31:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:31:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:31:54,676 INFO L87 Difference]: Start difference. First operand 198 states and 238 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:31:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:55,110 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2022-07-12 18:31:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:31:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-12 18:31:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:55,113 INFO L225 Difference]: With dead ends: 246 [2022-07-12 18:31:55,113 INFO L226 Difference]: Without dead ends: 234 [2022-07-12 18:31:55,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:31:55,113 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 153 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:55,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1351 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:31:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-12 18:31:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2022-07-12 18:31:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.4960629921259843) internal successors, (190), 173 states have internal predecessors, (190), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-07-12 18:31:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 264 transitions. [2022-07-12 18:31:55,136 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 264 transitions. Word has length 22 [2022-07-12 18:31:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:55,136 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 264 transitions. [2022-07-12 18:31:55,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:31:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 264 transitions. [2022-07-12 18:31:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:31:55,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:55,137 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:55,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:55,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:55,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash -843792011, now seen corresponding path program 2 times [2022-07-12 18:31:55,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:55,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853011361] [2022-07-12 18:31:55,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:31:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:55,346 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) [2022-07-12 18:31:55,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:31:55,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:31:55,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:31:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:31:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 18:31:55,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:55,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:55,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853011361] [2022-07-12 18:31:55,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853011361] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:55,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:55,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:31:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160795992] [2022-07-12 18:31:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:31:55,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:31:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:31:55,469 INFO L87 Difference]: Start difference. First operand 216 states and 264 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-12 18:31:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:55,815 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2022-07-12 18:31:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:31:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 25 [2022-07-12 18:31:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:55,817 INFO L225 Difference]: With dead ends: 214 [2022-07-12 18:31:55,817 INFO L226 Difference]: Without dead ends: 214 [2022-07-12 18:31:55,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:31:55,818 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 23 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:55,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 756 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:31:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-12 18:31:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-07-12 18:31:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 127 states have (on average 1.4803149606299213) internal successors, (188), 171 states have internal predecessors, (188), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-07-12 18:31:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2022-07-12 18:31:55,824 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 25 [2022-07-12 18:31:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:55,824 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2022-07-12 18:31:55,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-12 18:31:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2022-07-12 18:31:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:31:55,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:55,825 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:55,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:56,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:56,036 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash -843792010, now seen corresponding path program 1 times [2022-07-12 18:31:56,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:56,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828507052] [2022-07-12 18:31:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:56,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:56,038 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) [2022-07-12 18:31:56,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:31:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:56,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:31:56,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:56,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:31:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:56,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828507052] [2022-07-12 18:31:56,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828507052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:31:56,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:31:56,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-12 18:31:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522281289] [2022-07-12 18:31:56,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:31:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:31:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:31:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:31:56,568 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:31:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:57,604 INFO L93 Difference]: Finished difference Result 285 states and 358 transitions. [2022-07-12 18:31:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:31:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-12 18:31:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:57,606 INFO L225 Difference]: With dead ends: 285 [2022-07-12 18:31:57,606 INFO L226 Difference]: Without dead ends: 267 [2022-07-12 18:31:57,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:31:57,613 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 231 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:57,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1817 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:31:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-12 18:31:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 222. [2022-07-12 18:31:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 134 states have (on average 1.4402985074626866) internal successors, (193), 179 states have internal predecessors, (193), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-12 18:31:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 268 transitions. [2022-07-12 18:31:57,636 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 268 transitions. Word has length 25 [2022-07-12 18:31:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:57,638 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 268 transitions. [2022-07-12 18:31:57,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:31:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 268 transitions. [2022-07-12 18:31:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:31:57,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:57,639 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:57,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:57,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:57,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:57,847 INFO L85 PathProgramCache]: Analyzing trace with hash 168356342, now seen corresponding path program 2 times [2022-07-12 18:31:57,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:57,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915355149] [2022-07-12 18:31:57,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:31:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:57,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:57,849 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) [2022-07-12 18:31:57,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:31:57,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:31:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:31:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:31:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 18:31:58,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:58,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:31:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915355149] [2022-07-12 18:31:58,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915355149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:58,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:31:58,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:31:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458477469] [2022-07-12 18:31:58,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:58,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:31:58,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:31:58,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:31:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:31:58,068 INFO L87 Difference]: Start difference. First operand 222 states and 268 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-07-12 18:31:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:58,427 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2022-07-12 18:31:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:31:58,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 29 [2022-07-12 18:31:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:58,428 INFO L225 Difference]: With dead ends: 220 [2022-07-12 18:31:58,428 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 18:31:58,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:31:58,429 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:58,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 809 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:31:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 18:31:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-07-12 18:31:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 134 states have (on average 1.4253731343283582) internal successors, (191), 177 states have internal predecessors, (191), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-12 18:31:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 266 transitions. [2022-07-12 18:31:58,434 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 266 transitions. Word has length 29 [2022-07-12 18:31:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:58,434 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 266 transitions. [2022-07-12 18:31:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-07-12 18:31:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 266 transitions. [2022-07-12 18:31:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:31:58,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:58,435 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:58,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:58,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:31:58,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:31:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:58,643 INFO L85 PathProgramCache]: Analyzing trace with hash 924079462, now seen corresponding path program 1 times [2022-07-12 18:31:58,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:31:58,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443136659] [2022-07-12 18:31:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:58,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:31:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:31:58,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:31:58,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:31:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:31:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:58,885 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 [2022-07-12 18:31:58,903 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:31:58,903 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 [2022-07-12 18:31:58,921 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 [2022-07-12 18:31:59,013 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:31:59,035 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:31:59,063 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:31:59,083 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:31:59,105 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:31:59,124 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:31:59,143 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:31:59,163 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:31:59,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-12 18:31:59,255 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-12 18:31:59,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 53 [2022-07-12 18:31:59,342 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-12 18:31:59,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 55 [2022-07-12 18:31:59,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-12 18:31:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:31:59,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:00,835 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_DUPFFnew_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_552) |c_DUPFFnew_~ans~0#1.base|) (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-12 18:32:00,963 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_~ans~0#1.base|) .cse0) v_ArrVal_552) |c_DUPFFnew_~ans~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2022-07-12 18:32:00,977 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:32:00,977 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 24 treesize of output 25 [2022-07-12 18:32:00,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-07-12 18:32:00,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:32:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 8 not checked. [2022-07-12 18:32:05,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:32:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443136659] [2022-07-12 18:32:05,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443136659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:05,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:32:05,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-12 18:32:05,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76856688] [2022-07-12 18:32:05,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:05,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:32:05,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:32:05,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:32:05,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=287, Unknown=4, NotChecked=70, Total=420 [2022-07-12 18:32:05,618 INFO L87 Difference]: Start difference. First operand 220 states and 266 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:32:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:06,619 INFO L93 Difference]: Finished difference Result 219 states and 265 transitions. [2022-07-12 18:32:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:32:06,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 18:32:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:06,622 INFO L225 Difference]: With dead ends: 219 [2022-07-12 18:32:06,622 INFO L226 Difference]: Without dead ends: 219 [2022-07-12 18:32:06,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=91, Invalid=419, Unknown=4, NotChecked=86, Total=600 [2022-07-12 18:32:06,622 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 30 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2138 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:06,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2138 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 394 Unchecked, 0.8s Time] [2022-07-12 18:32:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-12 18:32:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-07-12 18:32:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 134 states have (on average 1.4179104477611941) internal successors, (190), 176 states have internal predecessors, (190), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-12 18:32:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2022-07-12 18:32:06,629 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 30 [2022-07-12 18:32:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:06,629 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2022-07-12 18:32:06,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:32:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2022-07-12 18:32:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:32:06,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:06,633 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:06,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:32:06,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:32:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 924079463, now seen corresponding path program 1 times [2022-07-12 18:32:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:32:06,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367440111] [2022-07-12 18:32:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:32:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:32:06,845 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) [2022-07-12 18:32:06,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:32:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:07,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 18:32:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:07,068 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 [2022-07-12 18:32:07,085 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:32:07,086 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 [2022-07-12 18:32:07,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-12 18:32:07,116 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 [2022-07-12 18:32:07,123 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 [2022-07-12 18:32:07,274 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:07,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:07,282 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 7 treesize of output 3 [2022-07-12 18:32:07,299 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:07,337 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:07,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,352 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 16 treesize of output 18 [2022-07-12 18:32:07,370 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:07,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,385 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 16 treesize of output 18 [2022-07-12 18:32:07,404 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,420 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 16 treesize of output 18 [2022-07-12 18:32:07,441 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:07,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:07,448 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 7 treesize of output 3 [2022-07-12 18:32:07,465 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:07,510 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:07,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,526 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 16 treesize of output 18 [2022-07-12 18:32:07,543 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,557 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 16 treesize of output 18 [2022-07-12 18:32:07,577 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:07,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-07-12 18:32:07,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 18:32:07,688 INFO L356 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-07-12 18:32:07,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2022-07-12 18:32:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 57 [2022-07-12 18:32:07,799 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-12 18:32:07,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-12 18:32:07,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:07,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-07-12 18:32:07,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-12 18:32:07,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-12 18:32:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:32:07,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:32,966 WARN L233 SmtUtils]: Spent 24.82s on a formula simplification that was a NOOP. DAG size: 194 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-07-12 18:32:38,054 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:32:38,054 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 48 treesize of output 1 [2022-07-12 18:32:38,062 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 18:32:38,062 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 45 treesize of output 1 [2022-07-12 18:32:39,060 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:32:39,060 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 45 treesize of output 36 [2022-07-12 18:32:39,062 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 54 treesize of output 36 [2022-07-12 18:32:39,067 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 19 treesize of output 11 [2022-07-12 18:32:39,083 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:32:39,084 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-07-12 18:32:39,095 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:32:39,095 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-12 18:32:39,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:32:39,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-07-12 18:32:39,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:32:39,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 18:32:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:32:39,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:32:39,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367440111] [2022-07-12 18:32:39,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367440111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:39,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:32:39,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-12 18:32:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323713010] [2022-07-12 18:32:39,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:39,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:32:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:32:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:32:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=359, Unknown=6, NotChecked=0, Total=420 [2022-07-12 18:32:39,367 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:32:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:42,458 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2022-07-12 18:32:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:32:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 18:32:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:42,466 INFO L225 Difference]: With dead ends: 220 [2022-07-12 18:32:42,467 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 18:32:42,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=144, Invalid=842, Unknown=6, NotChecked=0, Total=992 [2022-07-12 18:32:42,467 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 37 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:42,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2237 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 688 Invalid, 0 Unknown, 137 Unchecked, 2.2s Time] [2022-07-12 18:32:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 18:32:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2022-07-12 18:32:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 134 states have (on average 1.4104477611940298) internal successors, (189), 175 states have internal predecessors, (189), 35 states have call successors, (35), 10 states have call predecessors, (35), 11 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-07-12 18:32:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 264 transitions. [2022-07-12 18:32:42,473 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 264 transitions. Word has length 30 [2022-07-12 18:32:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:42,473 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 264 transitions. [2022-07-12 18:32:42,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:32:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 264 transitions. [2022-07-12 18:32:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:32:42,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:42,474 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:42,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:42,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:32:42,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:32:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:42,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2092985884, now seen corresponding path program 1 times [2022-07-12 18:32:42,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:32:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924852533] [2022-07-12 18:32:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:42,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:32:42,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:32:42,678 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) [2022-07-12 18:32:42,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 18:32:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:42,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:32:42,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:42,915 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 10 treesize of output 9 [2022-07-12 18:32:42,937 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 [2022-07-12 18:32:42,944 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 [2022-07-12 18:32:42,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:32:42,985 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 [2022-07-12 18:32:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 18:32:43,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:32:43,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:32:43,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924852533] [2022-07-12 18:32:43,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924852533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:43,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:43,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:32:43,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434596526] [2022-07-12 18:32:43,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:43,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:32:43,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:32:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:32:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:32:43,032 INFO L87 Difference]: Start difference. First operand 218 states and 264 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:32:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:43,695 INFO L93 Difference]: Finished difference Result 230 states and 271 transitions. [2022-07-12 18:32:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:32:43,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-07-12 18:32:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:43,697 INFO L225 Difference]: With dead ends: 230 [2022-07-12 18:32:43,697 INFO L226 Difference]: Without dead ends: 218 [2022-07-12 18:32:43,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:32:43,698 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 51 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:43,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 902 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:32:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-12 18:32:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2022-07-12 18:32:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 130 states have (on average 1.376923076923077) internal successors, (179), 170 states have internal predecessors, (179), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:32:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 249 transitions. [2022-07-12 18:32:43,702 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 249 transitions. Word has length 42 [2022-07-12 18:32:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:43,702 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 249 transitions. [2022-07-12 18:32:43,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:32:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 249 transitions. [2022-07-12 18:32:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:32:43,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:43,703 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:43,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:43,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:32:43,904 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:32:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -562772518, now seen corresponding path program 1 times [2022-07-12 18:32:43,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:32:43,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250142665] [2022-07-12 18:32:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:43,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:32:43,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:32:43,906 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) [2022-07-12 18:32:43,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:32:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:32:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 18:32:44,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 18:32:44,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:32:44,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250142665] [2022-07-12 18:32:44,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250142665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:44,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:32:44,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-12 18:32:44,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836788138] [2022-07-12 18:32:44,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:44,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:32:44,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:32:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:32:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:32:44,730 INFO L87 Difference]: Start difference. First operand 213 states and 249 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:32:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:46,602 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2022-07-12 18:32:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 18:32:46,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-07-12 18:32:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:46,604 INFO L225 Difference]: With dead ends: 291 [2022-07-12 18:32:46,604 INFO L226 Difference]: Without dead ends: 279 [2022-07-12 18:32:46,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=641, Invalid=1521, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:32:46,605 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 232 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:46,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 2355 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 18:32:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-12 18:32:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 220. [2022-07-12 18:32:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 177 states have internal predecessors, (186), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:32:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2022-07-12 18:32:46,617 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 56 [2022-07-12 18:32:46,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:46,618 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2022-07-12 18:32:46,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:32:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2022-07-12 18:32:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 18:32:46,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:46,620 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:46,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:46,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:32:46,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:32:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093162, now seen corresponding path program 2 times [2022-07-12 18:32:46,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:32:46,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909926131] [2022-07-12 18:32:46,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:32:46,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:32:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:32:46,833 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) [2022-07-12 18:32:46,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:32:46,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:32:46,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:32:46,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:32:46,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-07-12 18:32:47,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:32:47,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:32:47,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909926131] [2022-07-12 18:32:47,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909926131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:47,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:47,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:32:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115968643] [2022-07-12 18:32:47,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:47,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:32:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:32:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:32:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:32:47,011 INFO L87 Difference]: Start difference. First operand 220 states and 256 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-12 18:32:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:47,517 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2022-07-12 18:32:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:32:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 63 [2022-07-12 18:32:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:47,518 INFO L225 Difference]: With dead ends: 218 [2022-07-12 18:32:47,518 INFO L226 Difference]: Without dead ends: 218 [2022-07-12 18:32:47,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:32:47,519 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:47,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 738 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:32:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-12 18:32:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-07-12 18:32:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 175 states have internal predecessors, (184), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:32:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-07-12 18:32:47,524 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 63 [2022-07-12 18:32:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:47,524 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-07-12 18:32:47,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-12 18:32:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-07-12 18:32:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 18:32:47,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:47,525 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:47,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:47,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:32:47,732 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:32:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:47,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093161, now seen corresponding path program 1 times [2022-07-12 18:32:47,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:32:47,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132933993] [2022-07-12 18:32:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:47,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:32:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:32:47,734 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) [2022-07-12 18:32:47,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:32:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:48,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:32:48,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 18:32:48,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:32:48,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:32:48,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132933993] [2022-07-12 18:32:48,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132933993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:48,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:48,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:32:48,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150381319] [2022-07-12 18:32:48,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:48,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:32:48,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:32:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:32:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:32:48,261 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-07-12 18:32:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:48,849 INFO L93 Difference]: Finished difference Result 216 states and 252 transitions. [2022-07-12 18:32:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:32:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 63 [2022-07-12 18:32:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:48,851 INFO L225 Difference]: With dead ends: 216 [2022-07-12 18:32:48,851 INFO L226 Difference]: Without dead ends: 216 [2022-07-12 18:32:48,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:32:48,851 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 21 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:48,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 922 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:32:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-12 18:32:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-12 18:32:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 137 states have (on average 1.3284671532846715) internal successors, (182), 173 states have internal predecessors, (182), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:32:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 252 transitions. [2022-07-12 18:32:48,856 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 252 transitions. Word has length 63 [2022-07-12 18:32:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:48,856 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 252 transitions. [2022-07-12 18:32:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-07-12 18:32:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 252 transitions. [2022-07-12 18:32:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 18:32:48,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:48,857 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:48,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:49,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:32:49,057 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:32:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash -585378383, now seen corresponding path program 1 times [2022-07-12 18:32:49,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:32:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782338432] [2022-07-12 18:32:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:32:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:32:49,060 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:32:49,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:32:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:32:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:49,810 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 [2022-07-12 18:32:49,838 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:32:49,838 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 [2022-07-12 18:32:49,870 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 [2022-07-12 18:32:49,982 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:49,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,014 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,037 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,062 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,085 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,126 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,146 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,171 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,198 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,234 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,261 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:32:50,287 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:50,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-12 18:32:50,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2022-07-12 18:32:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:50,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 55 [2022-07-12 18:32:50,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:32:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-12 18:32:50,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:52,401 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1933 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_DUPFFnew_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1933) |c_DUPFFnew_~ans~0#1.base|) (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-12 18:32:52,490 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1933 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_~ans~0#1.base|) .cse0) v_ArrVal_1933) |c_DUPFFnew_~ans~0#1.base|) .cse0))))) is different from false [2022-07-12 18:32:52,509 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:32:52,509 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 24 treesize of output 25 [2022-07-12 18:32:52,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-07-12 18:32:52,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:32:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 12 not checked. [2022-07-12 18:32:54,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:32:54,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782338432] [2022-07-12 18:32:54,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782338432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:54,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:32:54,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-12 18:32:54,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739917419] [2022-07-12 18:32:54,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:54,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:32:54,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:32:54,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:32:54,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=288, Unknown=3, NotChecked=70, Total=420 [2022-07-12 18:32:54,621 INFO L87 Difference]: Start difference. First operand 216 states and 252 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:32:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:55,909 INFO L93 Difference]: Finished difference Result 220 states and 259 transitions. [2022-07-12 18:32:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:32:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-07-12 18:32:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:55,910 INFO L225 Difference]: With dead ends: 220 [2022-07-12 18:32:55,911 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 18:32:55,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=90, Invalid=421, Unknown=3, NotChecked=86, Total=600 [2022-07-12 18:32:55,912 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:55,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2282 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 543 Invalid, 0 Unknown, 369 Unchecked, 1.0s Time] [2022-07-12 18:32:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 18:32:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2022-07-12 18:32:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 137 states have (on average 1.3211678832116789) internal successors, (181), 172 states have internal predecessors, (181), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:32:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 251 transitions. [2022-07-12 18:32:55,918 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 251 transitions. Word has length 64 [2022-07-12 18:32:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:55,918 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 251 transitions. [2022-07-12 18:32:55,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:32:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 251 transitions. [2022-07-12 18:32:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 18:32:55,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:55,919 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:55,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:56,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:32:56,139 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:32:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -585378382, now seen corresponding path program 1 times [2022-07-12 18:32:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:32:56,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666306644] [2022-07-12 18:32:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:56,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:32:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:32:56,141 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) [2022-07-12 18:32:56,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:32:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 18:32:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:56,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:32:56,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-12 18:32:56,949 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:32:56,950 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 [2022-07-12 18:32:56,978 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 [2022-07-12 18:32:56,989 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 [2022-07-12 18:32:57,176 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,193 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 16 treesize of output 18 [2022-07-12 18:32:57,214 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:57,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:57,220 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 7 treesize of output 3 [2022-07-12 18:32:57,240 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,284 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,300 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 16 treesize of output 18 [2022-07-12 18:32:57,334 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:57,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:57,341 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 7 treesize of output 3 [2022-07-12 18:32:57,360 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,404 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,419 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 16 treesize of output 18 [2022-07-12 18:32:57,439 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:57,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:57,445 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 7 treesize of output 3 [2022-07-12 18:32:57,460 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,510 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:57,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:57,516 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 7 treesize of output 3 [2022-07-12 18:32:57,530 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,566 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,583 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 16 treesize of output 18 [2022-07-12 18:32:57,601 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:57,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:57,605 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 7 treesize of output 3 [2022-07-12 18:32:57,621 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,661 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:57,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:32:57,667 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 7 treesize of output 3 [2022-07-12 18:32:57,684 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,726 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:32:57,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,750 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 16 treesize of output 18 [2022-07-12 18:32:57,774 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:32:57,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-07-12 18:32:57,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 18:32:57,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-12 18:32:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 57 [2022-07-12 18:32:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2022-07-12 18:32:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:57,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-07-12 18:32:58,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:32:58,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:32:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-12 18:32:58,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:33:57,572 WARN L233 SmtUtils]: Spent 59.28s on a formula simplification that was a NOOP. DAG size: 227 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-07-12 18:34:04,134 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:34:04,135 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 40 treesize of output 1 [2022-07-12 18:34:04,141 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:34:04,142 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 37 treesize of output 1 [2022-07-12 18:34:05,252 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:34:05,252 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 45 treesize of output 36 [2022-07-12 18:34:05,256 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 54 treesize of output 36 [2022-07-12 18:34:05,261 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 19 treesize of output 11 [2022-07-12 18:34:05,280 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:34:05,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-07-12 18:34:05,291 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:34:05,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-12 18:34:05,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:05,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-07-12 18:34:05,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:05,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 18:34:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-12 18:34:05,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666306644] [2022-07-12 18:34:05,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666306644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:05,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:05,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-12 18:34:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951849390] [2022-07-12 18:34:05,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:05,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:34:05,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:34:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=358, Unknown=7, NotChecked=0, Total=420 [2022-07-12 18:34:05,588 INFO L87 Difference]: Start difference. First operand 215 states and 251 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:34:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:09,165 INFO L93 Difference]: Finished difference Result 219 states and 258 transitions. [2022-07-12 18:34:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:34:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-07-12 18:34:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:09,168 INFO L225 Difference]: With dead ends: 219 [2022-07-12 18:34:09,168 INFO L226 Difference]: Without dead ends: 219 [2022-07-12 18:34:09,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=104, Invalid=645, Unknown=7, NotChecked=0, Total=756 [2022-07-12 18:34:09,169 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 25 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:09,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2047 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 696 Invalid, 0 Unknown, 272 Unchecked, 2.5s Time] [2022-07-12 18:34:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-12 18:34:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 214. [2022-07-12 18:34:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 137 states have (on average 1.313868613138686) internal successors, (180), 171 states have internal predecessors, (180), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 18:34:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 250 transitions. [2022-07-12 18:34:09,173 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 250 transitions. Word has length 64 [2022-07-12 18:34:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:09,173 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 250 transitions. [2022-07-12 18:34:09,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:34:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 250 transitions. [2022-07-12 18:34:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 18:34:09,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:09,174 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:09,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-12 18:34:09,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:09,390 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:09,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:09,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1825741073, now seen corresponding path program 1 times [2022-07-12 18:34:09,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:09,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831540042] [2022-07-12 18:34:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:09,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:09,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:09,392 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:09,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:34:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:10,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:34:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:10,060 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 [2022-07-12 18:34:10,134 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 [2022-07-12 18:34:10,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:34:10,347 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-12 18:34:10,347 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 4 case distinctions, treesize of input 20 treesize of output 36 [2022-07-12 18:34:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 128 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-12 18:34:10,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:12,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:12,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831540042] [2022-07-12 18:34:12,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831540042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:12,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [280216961] [2022-07-12 18:34:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:12,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:34:12,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:34:12,596 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:34:12,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-12 18:34:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:13,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:34:13,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:19,572 INFO L356 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-07-12 18:34:19,573 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 2 case distinctions, treesize of input 15 treesize of output 29 [2022-07-12 18:34:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-12 18:34:19,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:19,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [280216961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:19,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:34:19,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [15] total 21 [2022-07-12 18:34:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337900185] [2022-07-12 18:34:19,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:34:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:34:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=445, Unknown=3, NotChecked=0, Total=506 [2022-07-12 18:34:19,641 INFO L87 Difference]: Start difference. First operand 214 states and 250 transitions. Second operand has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:34:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:20,650 INFO L93 Difference]: Finished difference Result 253 states and 304 transitions. [2022-07-12 18:34:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:34:20,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-07-12 18:34:20,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:20,652 INFO L225 Difference]: With dead ends: 253 [2022-07-12 18:34:20,652 INFO L226 Difference]: Without dead ends: 253 [2022-07-12 18:34:20,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=66, Invalid=531, Unknown=3, NotChecked=0, Total=600 [2022-07-12 18:34:20,652 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 72 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:20,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1377 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 706 Invalid, 0 Unknown, 524 Unchecked, 0.9s Time] [2022-07-12 18:34:20,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-12 18:34:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2022-07-12 18:34:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 152 states have (on average 1.3289473684210527) internal successors, (202), 187 states have internal predecessors, (202), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-12 18:34:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 282 transitions. [2022-07-12 18:34:20,661 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 282 transitions. Word has length 71 [2022-07-12 18:34:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:20,662 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 282 transitions. [2022-07-12 18:34:20,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:34:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 282 transitions. [2022-07-12 18:34:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 18:34:20,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:20,663 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:20,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:20,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:21,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:34:21,068 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1825741072, now seen corresponding path program 1 times [2022-07-12 18:34:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:21,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248813694] [2022-07-12 18:34:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:21,070 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:21,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:34:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:34:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:22,109 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 [2022-07-12 18:34:22,182 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 29 treesize of output 17 [2022-07-12 18:34:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:34:22,501 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-12 18:34:22,501 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-12 18:34:22,516 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:34:22,516 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 [2022-07-12 18:34:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-12 18:34:22,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:25,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:25,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248813694] [2022-07-12 18:34:25,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248813694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:25,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1333450617] [2022-07-12 18:34:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:25,644 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:34:25,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:34:25,645 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:34:25,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-12 18:34:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:27,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 18:34:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:27,724 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 [2022-07-12 18:34:27,728 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 [2022-07-12 18:34:27,806 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:34:27,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 18:34:27,826 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:34:27,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:34:28,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:34:28,558 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-12 18:34:28,559 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-12 18:34:28,569 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:34:28,571 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 [2022-07-12 18:34:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-12 18:34:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:29,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1333450617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:29,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:29,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-07-12 18:34:29,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849197408] [2022-07-12 18:34:29,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:29,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:34:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:34:29,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:34:29,445 INFO L87 Difference]: Start difference. First operand 236 states and 282 transitions. Second operand has 30 states, 27 states have (on average 2.962962962962963) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:34:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:31,690 INFO L93 Difference]: Finished difference Result 249 states and 298 transitions. [2022-07-12 18:34:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:34:31,691 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.962962962962963) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 71 [2022-07-12 18:34:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:31,692 INFO L225 Difference]: With dead ends: 249 [2022-07-12 18:34:31,692 INFO L226 Difference]: Without dead ends: 249 [2022-07-12 18:34:31,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:34:31,693 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 71 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 788 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:31,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1472 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 836 Invalid, 0 Unknown, 788 Unchecked, 1.4s Time] [2022-07-12 18:34:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-12 18:34:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2022-07-12 18:34:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 156 states have (on average 1.3205128205128205) internal successors, (206), 191 states have internal predecessors, (206), 39 states have call successors, (39), 13 states have call predecessors, (39), 14 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-12 18:34:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 286 transitions. [2022-07-12 18:34:31,698 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 286 transitions. Word has length 71 [2022-07-12 18:34:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:31,698 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 286 transitions. [2022-07-12 18:34:31,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.962962962962963) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:34:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 286 transitions. [2022-07-12 18:34:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-12 18:34:31,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:31,699 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:31,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:31,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-07-12 18:34:32,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:34:32,118 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:32,118 INFO L85 PathProgramCache]: Analyzing trace with hash -242190254, now seen corresponding path program 1 times [2022-07-12 18:34:32,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460263733] [2022-07-12 18:34:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:32,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:32,120 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:32,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 18:34:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:34:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-12 18:34:32,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:32,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460263733] [2022-07-12 18:34:32,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460263733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:32,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:32,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 18:34:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807785452] [2022-07-12 18:34:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:32,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:34:32,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:34:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:32,741 INFO L87 Difference]: Start difference. First operand 241 states and 286 transitions. Second operand has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:34:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:33,053 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2022-07-12 18:34:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:34:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-07-12 18:34:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:33,054 INFO L225 Difference]: With dead ends: 247 [2022-07-12 18:34:33,054 INFO L226 Difference]: Without dead ends: 247 [2022-07-12 18:34:33,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:34:33,055 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 13 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:33,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 485 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-07-12 18:34:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-12 18:34:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-07-12 18:34:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 160 states have (on average 1.31875) internal successors, (211), 195 states have internal predecessors, (211), 39 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-12 18:34:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 291 transitions. [2022-07-12 18:34:33,060 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 291 transitions. Word has length 77 [2022-07-12 18:34:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:33,060 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 291 transitions. [2022-07-12 18:34:33,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:34:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 291 transitions. [2022-07-12 18:34:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-12 18:34:33,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:33,061 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:33,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:33,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:33,274 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash -242190253, now seen corresponding path program 1 times [2022-07-12 18:34:33,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82471499] [2022-07-12 18:34:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:33,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:33,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:33,276 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:33,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:34:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:34:33,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 18:34:34,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:34,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82471499] [2022-07-12 18:34:34,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82471499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:34,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:34,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:34:34,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840332095] [2022-07-12 18:34:34,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:34,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:34:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:34:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:34:34,064 INFO L87 Difference]: Start difference. First operand 246 states and 291 transitions. Second operand has 12 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:34:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:34,897 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2022-07-12 18:34:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:34:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-07-12 18:34:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:34,901 INFO L225 Difference]: With dead ends: 251 [2022-07-12 18:34:34,901 INFO L226 Difference]: Without dead ends: 251 [2022-07-12 18:34:34,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:34:34,901 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 37 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:34,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1361 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 0 Unknown, 56 Unchecked, 0.8s Time] [2022-07-12 18:34:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-12 18:34:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2022-07-12 18:34:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 160 states have (on average 1.3125) internal successors, (210), 195 states have internal predecessors, (210), 39 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-12 18:34:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 290 transitions. [2022-07-12 18:34:34,906 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 290 transitions. Word has length 77 [2022-07-12 18:34:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:34,906 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 290 transitions. [2022-07-12 18:34:34,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:34:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 290 transitions. [2022-07-12 18:34:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 18:34:34,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:34,907 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:34,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-12 18:34:35,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:35,120 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1668104532, now seen corresponding path program 1 times [2022-07-12 18:34:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:35,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547993522] [2022-07-12 18:34:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:35,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:35,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:35,122 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:35,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 18:34:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:35,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:34:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 18:34:35,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:36,225 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 [2022-07-12 18:34:36,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:34:36,389 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 16 treesize of output 20 [2022-07-12 18:34:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 3 proven. 136 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-12 18:34:36,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:36,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547993522] [2022-07-12 18:34:36,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547993522] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:36,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:36,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-12 18:34:36,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600963095] [2022-07-12 18:34:36,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:36,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:34:36,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:36,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:34:36,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:34:36,913 INFO L87 Difference]: Start difference. First operand 246 states and 290 transitions. Second operand has 25 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 19 states have internal predecessors, (94), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:34:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:39,850 INFO L93 Difference]: Finished difference Result 264 states and 307 transitions. [2022-07-12 18:34:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:34:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 19 states have internal predecessors, (94), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 84 [2022-07-12 18:34:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:39,853 INFO L225 Difference]: With dead ends: 264 [2022-07-12 18:34:39,853 INFO L226 Difference]: Without dead ends: 264 [2022-07-12 18:34:39,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:34:39,854 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 117 mSDsluCounter, 2410 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:39,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 2597 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 884 Invalid, 0 Unknown, 97 Unchecked, 2.6s Time] [2022-07-12 18:34:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-12 18:34:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-07-12 18:34:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 169 states have (on average 1.301775147928994) internal successors, (220), 203 states have internal predecessors, (220), 41 states have call successors, (41), 17 states have call predecessors, (41), 16 states have return successors, (44), 40 states have call predecessors, (44), 41 states have call successors, (44) [2022-07-12 18:34:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 305 transitions. [2022-07-12 18:34:39,871 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 305 transitions. Word has length 84 [2022-07-12 18:34:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:39,872 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 305 transitions. [2022-07-12 18:34:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 19 states have internal predecessors, (94), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:34:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 305 transitions. [2022-07-12 18:34:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-12 18:34:39,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:39,873 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:39,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:40,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:40,081 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1112953710, now seen corresponding path program 1 times [2022-07-12 18:34:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61539547] [2022-07-12 18:34:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:40,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:40,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:40,084 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:40,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:34:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:34:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-12 18:34:40,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-12 18:34:40,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:40,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61539547] [2022-07-12 18:34:40,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61539547] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:40,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:40,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2022-07-12 18:34:40,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863561235] [2022-07-12 18:34:40,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:40,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:34:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:34:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:34:40,854 INFO L87 Difference]: Start difference. First operand 258 states and 305 transitions. Second operand has 13 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:34:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:41,480 INFO L93 Difference]: Finished difference Result 268 states and 315 transitions. [2022-07-12 18:34:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:34:41,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2022-07-12 18:34:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:41,482 INFO L225 Difference]: With dead ends: 268 [2022-07-12 18:34:41,482 INFO L226 Difference]: Without dead ends: 268 [2022-07-12 18:34:41,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:34:41,482 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 33 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:41,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 781 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 68 Unchecked, 0.6s Time] [2022-07-12 18:34:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-12 18:34:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 265. [2022-07-12 18:34:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 174 states have (on average 1.2988505747126438) internal successors, (226), 208 states have internal predecessors, (226), 42 states have call successors, (42), 19 states have call predecessors, (42), 17 states have return successors, (45), 40 states have call predecessors, (45), 42 states have call successors, (45) [2022-07-12 18:34:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-07-12 18:34:41,487 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 86 [2022-07-12 18:34:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:41,487 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-07-12 18:34:41,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:34:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-07-12 18:34:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-12 18:34:41,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:41,488 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:41,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:41,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:41,689 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1112953709, now seen corresponding path program 1 times [2022-07-12 18:34:41,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:41,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562815852] [2022-07-12 18:34:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:41,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:41,692 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:41,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 18:34:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:42,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:34:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-12 18:34:42,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:43,691 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 24 treesize of output 20 [2022-07-12 18:34:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-12 18:34:43,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:43,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562815852] [2022-07-12 18:34:43,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562815852] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:43,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:43,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-12 18:34:43,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857689396] [2022-07-12 18:34:43,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:34:43,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:43,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:34:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:34:43,804 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 25 states, 22 states have (on average 3.772727272727273) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 18:34:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:47,223 INFO L93 Difference]: Finished difference Result 284 states and 334 transitions. [2022-07-12 18:34:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:34:47,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.772727272727273) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 86 [2022-07-12 18:34:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:47,226 INFO L225 Difference]: With dead ends: 284 [2022-07-12 18:34:47,226 INFO L226 Difference]: Without dead ends: 284 [2022-07-12 18:34:47,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:34:47,227 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 99 mSDsluCounter, 2709 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:47,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 2892 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1228 Invalid, 0 Unknown, 61 Unchecked, 3.2s Time] [2022-07-12 18:34:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-12 18:34:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 278. [2022-07-12 18:34:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 184 states have (on average 1.309782608695652) internal successors, (241), 219 states have internal predecessors, (241), 44 states have call successors, (44), 20 states have call predecessors, (44), 18 states have return successors, (47), 41 states have call predecessors, (47), 44 states have call successors, (47) [2022-07-12 18:34:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 332 transitions. [2022-07-12 18:34:47,233 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 332 transitions. Word has length 86 [2022-07-12 18:34:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:47,233 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 332 transitions. [2022-07-12 18:34:47,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.772727272727273) internal successors, (83), 17 states have internal predecessors, (83), 7 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 18:34:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 332 transitions. [2022-07-12 18:34:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 18:34:47,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:47,234 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:47,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-12 18:34:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:47,448 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash 194820021, now seen corresponding path program 2 times [2022-07-12 18:34:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122866104] [2022-07-12 18:34:47,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:34:47,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:47,451 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:47,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 18:34:48,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:34:48,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:34:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:34:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-07-12 18:34:48,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:48,321 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:34:48,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 18:34:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-12 18:34:48,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:48,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122866104] [2022-07-12 18:34:48,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122866104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:48,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:48,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2022-07-12 18:34:48,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766863086] [2022-07-12 18:34:48,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:48,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:34:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:48,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:34:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:48,331 INFO L87 Difference]: Start difference. First operand 278 states and 332 transitions. Second operand has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 18:34:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:48,463 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2022-07-12 18:34:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:34:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 92 [2022-07-12 18:34:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:48,464 INFO L225 Difference]: With dead ends: 284 [2022-07-12 18:34:48,464 INFO L226 Difference]: Without dead ends: 284 [2022-07-12 18:34:48,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 174 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:34:48,465 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 18 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:48,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 503 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-07-12 18:34:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-12 18:34:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2022-07-12 18:34:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 186 states have (on average 1.3118279569892473) internal successors, (244), 220 states have internal predecessors, (244), 44 states have call successors, (44), 21 states have call predecessors, (44), 18 states have return successors, (47), 41 states have call predecessors, (47), 44 states have call successors, (47) [2022-07-12 18:34:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 335 transitions. [2022-07-12 18:34:48,470 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 335 transitions. Word has length 92 [2022-07-12 18:34:48,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:48,470 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 335 transitions. [2022-07-12 18:34:48,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 18:34:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 335 transitions. [2022-07-12 18:34:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 18:34:48,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:48,471 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:48,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:48,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:48,684 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 194820022, now seen corresponding path program 2 times [2022-07-12 18:34:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:48,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95399257] [2022-07-12 18:34:48,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:34:48,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:48,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:48,686 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:48,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 18:34:49,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:34:49,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:34:49,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:34:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 7 proven. 143 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-12 18:34:49,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:50,234 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 [2022-07-12 18:34:50,435 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:34:50,435 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 16 treesize of output 20 [2022-07-12 18:34:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 5 proven. 143 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-12 18:34:50,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95399257] [2022-07-12 18:34:50,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95399257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:50,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:50,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2022-07-12 18:34:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776130443] [2022-07-12 18:34:50,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:50,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:34:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:34:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:34:50,997 INFO L87 Difference]: Start difference. First operand 280 states and 335 transitions. Second operand has 29 states, 24 states have (on average 4.0) internal successors, (96), 21 states have internal predecessors, (96), 9 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-12 18:34:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:55,675 INFO L93 Difference]: Finished difference Result 432 states and 528 transitions. [2022-07-12 18:34:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:34:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.0) internal successors, (96), 21 states have internal predecessors, (96), 9 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 92 [2022-07-12 18:34:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:55,677 INFO L225 Difference]: With dead ends: 432 [2022-07-12 18:34:55,677 INFO L226 Difference]: Without dead ends: 432 [2022-07-12 18:34:55,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:34:55,678 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 366 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:55,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 3188 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1478 Invalid, 0 Unknown, 166 Unchecked, 3.8s Time] [2022-07-12 18:34:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-12 18:34:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 379. [2022-07-12 18:34:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 248 states have (on average 1.4112903225806452) internal successors, (350), 285 states have internal predecessors, (350), 77 states have call successors, (77), 25 states have call predecessors, (77), 22 states have return successors, (79), 74 states have call predecessors, (79), 77 states have call successors, (79) [2022-07-12 18:34:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 506 transitions. [2022-07-12 18:34:55,685 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 506 transitions. Word has length 92 [2022-07-12 18:34:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:55,685 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 506 transitions. [2022-07-12 18:34:55,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.0) internal successors, (96), 21 states have internal predecessors, (96), 9 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-12 18:34:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 506 transitions. [2022-07-12 18:34:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 18:34:55,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:55,686 INFO L195 NwaCegarLoop]: trace histogram [20, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:55,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:55,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:55,902 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting DUPFFexgcdErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:55,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1693134889, now seen corresponding path program 1 times [2022-07-12 18:34:55,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:55,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94473299] [2022-07-12 18:34:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:55,903 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:55,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 18:34:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 18:34:56,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-07-12 18:34:56,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:56,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:56,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94473299] [2022-07-12 18:34:56,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94473299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:56,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:56,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383406942] [2022-07-12 18:34:56,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:56,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:34:56,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:34:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:56,535 INFO L87 Difference]: Start difference. First operand 379 states and 506 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 18:34:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:56,540 INFO L93 Difference]: Finished difference Result 366 states and 475 transitions. [2022-07-12 18:34:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:34:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 91 [2022-07-12 18:34:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:56,542 INFO L225 Difference]: With dead ends: 366 [2022-07-12 18:34:56,542 INFO L226 Difference]: Without dead ends: 363 [2022-07-12 18:34:56,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:56,543 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 0 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:56,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 391 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-12 18:34:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-07-12 18:34:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 236 states have (on average 1.3728813559322033) internal successors, (324), 271 states have internal predecessors, (324), 73 states have call successors, (73), 25 states have call predecessors, (73), 22 states have return successors, (75), 72 states have call predecessors, (75), 73 states have call successors, (75) [2022-07-12 18:34:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 472 transitions. [2022-07-12 18:34:56,558 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 472 transitions. Word has length 91 [2022-07-12 18:34:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:56,559 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 472 transitions. [2022-07-12 18:34:56,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 18:34:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 472 transitions. [2022-07-12 18:34:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 18:34:56,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:56,560 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:56,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-12 18:34:56,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:56,774 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash -947339607, now seen corresponding path program 1 times [2022-07-12 18:34:56,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:56,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929206836] [2022-07-12 18:34:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:56,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:56,776 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:56,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 18:34:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:34:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-07-12 18:34:57,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:57,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:57,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929206836] [2022-07-12 18:34:57,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929206836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:57,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:57,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 18:34:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612402689] [2022-07-12 18:34:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:57,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:34:57,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:34:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:57,619 INFO L87 Difference]: Start difference. First operand 363 states and 472 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:34:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:58,075 INFO L93 Difference]: Finished difference Result 363 states and 471 transitions. [2022-07-12 18:34:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:34:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2022-07-12 18:34:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:58,077 INFO L225 Difference]: With dead ends: 363 [2022-07-12 18:34:58,077 INFO L226 Difference]: Without dead ends: 363 [2022-07-12 18:34:58,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:34:58,078 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 15 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:58,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 760 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-07-12 18:34:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-12 18:34:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-07-12 18:34:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 236 states have (on average 1.36864406779661) internal successors, (323), 271 states have internal predecessors, (323), 73 states have call successors, (73), 25 states have call predecessors, (73), 22 states have return successors, (75), 72 states have call predecessors, (75), 73 states have call successors, (75) [2022-07-12 18:34:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 471 transitions. [2022-07-12 18:34:58,084 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 471 transitions. Word has length 92 [2022-07-12 18:34:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:58,084 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 471 transitions. [2022-07-12 18:34:58,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:34:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 471 transitions. [2022-07-12 18:34:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-12 18:34:58,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:58,085 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:58,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:58,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:58,298 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:58,298 INFO L85 PathProgramCache]: Analyzing trace with hash -215615000, now seen corresponding path program 1 times [2022-07-12 18:34:58,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:58,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043870530] [2022-07-12 18:34:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:58,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:58,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:58,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:58,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 18:34:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:58,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:34:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-07-12 18:34:59,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-07-12 18:34:59,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:34:59,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043870530] [2022-07-12 18:34:59,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043870530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:59,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:34:59,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2022-07-12 18:34:59,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714777159] [2022-07-12 18:34:59,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:59,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:34:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:34:59,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:34:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:34:59,269 INFO L87 Difference]: Start difference. First operand 363 states and 471 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:34:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:59,628 INFO L93 Difference]: Finished difference Result 377 states and 488 transitions. [2022-07-12 18:34:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:34:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2022-07-12 18:34:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:59,630 INFO L225 Difference]: With dead ends: 377 [2022-07-12 18:34:59,630 INFO L226 Difference]: Without dead ends: 377 [2022-07-12 18:34:59,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 178 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:34:59,631 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 19 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:59,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 545 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-07-12 18:34:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-12 18:34:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2022-07-12 18:34:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 245 states have (on average 1.3591836734693878) internal successors, (333), 280 states have internal predecessors, (333), 75 states have call successors, (75), 27 states have call predecessors, (75), 24 states have return successors, (77), 74 states have call predecessors, (77), 75 states have call successors, (77) [2022-07-12 18:34:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 485 transitions. [2022-07-12 18:34:59,638 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 485 transitions. Word has length 99 [2022-07-12 18:34:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:59,638 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 485 transitions. [2022-07-12 18:34:59,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:34:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 485 transitions. [2022-07-12 18:34:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-12 18:34:59,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:59,639 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:59,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-12 18:34:59,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:34:59,852 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting DUPFFdegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:34:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1134883697, now seen corresponding path program 3 times [2022-07-12 18:34:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:34:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113619672] [2022-07-12 18:34:59,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:34:59,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:34:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:34:59,853 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:34:59,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 18:35:00,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 18:35:00,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:35:00,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:35:00,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-07-12 18:35:00,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:00,899 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:35:00,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 18:35:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-07-12 18:35:00,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:35:00,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113619672] [2022-07-12 18:35:00,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113619672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:35:00,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:35:00,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-12 18:35:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614689225] [2022-07-12 18:35:00,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:35:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:35:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:35:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:35:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:35:00,914 INFO L87 Difference]: Start difference. First operand 376 states and 485 transitions. Second operand has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 18:35:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:01,673 INFO L93 Difference]: Finished difference Result 405 states and 516 transitions. [2022-07-12 18:35:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:35:01,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 101 [2022-07-12 18:35:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:01,675 INFO L225 Difference]: With dead ends: 405 [2022-07-12 18:35:01,675 INFO L226 Difference]: Without dead ends: 405 [2022-07-12 18:35:01,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:35:01,675 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 79 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:01,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 976 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:35:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-12 18:35:01,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 376. [2022-07-12 18:35:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 245 states have (on average 1.3387755102040817) internal successors, (328), 280 states have internal predecessors, (328), 75 states have call successors, (75), 26 states have call predecessors, (75), 25 states have return successors, (79), 75 states have call predecessors, (79), 75 states have call successors, (79) [2022-07-12 18:35:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 482 transitions. [2022-07-12 18:35:01,682 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 482 transitions. Word has length 101 [2022-07-12 18:35:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:01,683 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 482 transitions. [2022-07-12 18:35:01,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 18:35:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 482 transitions. [2022-07-12 18:35:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-12 18:35:01,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:01,684 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:01,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-12 18:35:01,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:35:01,918 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:35:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1134883696, now seen corresponding path program 3 times [2022-07-12 18:35:01,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:35:01,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517738870] [2022-07-12 18:35:01,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:35:01,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:35:01,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:35:01,921 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:35:01,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-12 18:35:03,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 18:35:03,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:35:03,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:35:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 21 proven. 139 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-12 18:35:03,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:03,794 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 [2022-07-12 18:35:03,990 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:03,993 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 16 treesize of output 20 [2022-07-12 18:35:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 21 proven. 139 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-12 18:35:04,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:35:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517738870] [2022-07-12 18:35:04,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517738870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:35:04,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:35:04,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2022-07-12 18:35:04,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29335066] [2022-07-12 18:35:04,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:35:04,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:35:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:35:04,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:35:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:35:04,745 INFO L87 Difference]: Start difference. First operand 376 states and 482 transitions. Second operand has 32 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 22 states have internal predecessors, (96), 11 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-12 18:35:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:14,754 INFO L93 Difference]: Finished difference Result 514 states and 619 transitions. [2022-07-12 18:35:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:35:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 22 states have internal predecessors, (96), 11 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 101 [2022-07-12 18:35:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:14,758 INFO L225 Difference]: With dead ends: 514 [2022-07-12 18:35:14,758 INFO L226 Difference]: Without dead ends: 514 [2022-07-12 18:35:14,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=283, Invalid=2167, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 18:35:14,759 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 883 mSDsluCounter, 6888 mSDsCounter, 0 mSdLazyCounter, 3243 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 7304 SdHoareTripleChecker+Invalid, 3702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 3243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:14,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 7304 Invalid, 3702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 3243 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-07-12 18:35:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-07-12 18:35:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 441. [2022-07-12 18:35:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 283 states have (on average 1.392226148409894) internal successors, (394), 320 states have internal predecessors, (394), 102 states have call successors, (102), 28 states have call predecessors, (102), 25 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2022-07-12 18:35:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 598 transitions. [2022-07-12 18:35:14,768 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 598 transitions. Word has length 101 [2022-07-12 18:35:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:14,768 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 598 transitions. [2022-07-12 18:35:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 22 states have internal predecessors, (96), 11 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-12 18:35:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 598 transitions. [2022-07-12 18:35:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-12 18:35:14,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:14,769 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:14,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:14,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:35:14,984 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting DUPFFexgcdErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:35:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash -485059473, now seen corresponding path program 1 times [2022-07-12 18:35:14,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:35:14,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101251001] [2022-07-12 18:35:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:14,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:35:14,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:35:14,987 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:35:14,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-12 18:35:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:15,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:35:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:16,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 38 [2022-07-12 18:35:16,352 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:35:16,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 18 [2022-07-12 18:35:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-12 18:35:16,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:35:16,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:35:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101251001] [2022-07-12 18:35:16,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101251001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:16,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:16,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 18:35:16,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781528026] [2022-07-12 18:35:16,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:16,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:35:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:35:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:35:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:35:16,394 INFO L87 Difference]: Start difference. First operand 441 states and 598 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:35:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:16,738 INFO L93 Difference]: Finished difference Result 378 states and 474 transitions. [2022-07-12 18:35:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:35:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 98 [2022-07-12 18:35:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:16,741 INFO L225 Difference]: With dead ends: 378 [2022-07-12 18:35:16,741 INFO L226 Difference]: Without dead ends: 362 [2022-07-12 18:35:16,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:35:16,741 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 12 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:16,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2200 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-07-12 18:35:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-12 18:35:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-07-12 18:35:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 235 states have (on average 1.327659574468085) internal successors, (312), 269 states have internal predecessors, (312), 73 states have call successors, (73), 26 states have call predecessors, (73), 23 states have return successors, (73), 72 states have call predecessors, (73), 73 states have call successors, (73) [2022-07-12 18:35:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 458 transitions. [2022-07-12 18:35:16,753 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 458 transitions. Word has length 98 [2022-07-12 18:35:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:16,753 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 458 transitions. [2022-07-12 18:35:16,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:35:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 458 transitions. [2022-07-12 18:35:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-12 18:35:16,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:16,754 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:16,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:16,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:35:16,969 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting DUPFFdegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:35:16,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash 957572595, now seen corresponding path program 4 times [2022-07-12 18:35:16,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:35:16,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701210094] [2022-07-12 18:35:16,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:35:16,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:35:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:35:16,971 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:35:16,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 18:35:17,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:35:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:35:17,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:35:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-12 18:35:18,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:19,224 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 24 treesize of output 20 [2022-07-12 18:35:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-12 18:35:19,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:35:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701210094] [2022-07-12 18:35:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701210094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:35:19,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:35:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-12 18:35:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273752009] [2022-07-12 18:35:19,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:35:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:35:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:35:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:35:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:35:19,338 INFO L87 Difference]: Start difference. First operand 362 states and 458 transitions. Second operand has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 17 states have internal predecessors, (85), 7 states have call successors, (18), 8 states have call predecessors, (18), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-12 18:35:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:22,919 INFO L93 Difference]: Finished difference Result 373 states and 473 transitions. [2022-07-12 18:35:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:35:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 17 states have internal predecessors, (85), 7 states have call successors, (18), 8 states have call predecessors, (18), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 107 [2022-07-12 18:35:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:22,921 INFO L225 Difference]: With dead ends: 373 [2022-07-12 18:35:22,921 INFO L226 Difference]: Without dead ends: 373 [2022-07-12 18:35:22,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:35:22,922 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 125 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2452 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:22,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 2452 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1231 Invalid, 0 Unknown, 84 Unchecked, 3.2s Time] [2022-07-12 18:35:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-12 18:35:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 360. [2022-07-12 18:35:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 233 states have (on average 1.3218884120171674) internal successors, (308), 268 states have internal predecessors, (308), 73 states have call successors, (73), 25 states have call predecessors, (73), 23 states have return successors, (73), 72 states have call predecessors, (73), 73 states have call successors, (73) [2022-07-12 18:35:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 454 transitions. [2022-07-12 18:35:22,933 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 454 transitions. Word has length 107 [2022-07-12 18:35:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:22,935 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 454 transitions. [2022-07-12 18:35:22,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 17 states have internal predecessors, (85), 7 states have call successors, (18), 8 states have call predecessors, (18), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-12 18:35:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 454 transitions. [2022-07-12 18:35:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-12 18:35:22,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:22,936 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:22,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:23,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:35:23,150 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting DUPFFexgcdErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:35:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash 783105185, now seen corresponding path program 1 times [2022-07-12 18:35:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:35:23,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056757680] [2022-07-12 18:35:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:23,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:35:23,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:35:23,153 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:35:23,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-12 18:35:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 18:35:24,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:24,501 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 [2022-07-12 18:35:24,542 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:35:24,543 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 [2022-07-12 18:35:24,566 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 [2022-07-12 18:35:24,696 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,718 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,744 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,767 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,788 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,811 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,838 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,858 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,879 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,900 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,933 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-07-12 18:35:24,973 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:24,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-12 18:35:25,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2022-07-12 18:35:25,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 55 [2022-07-12 18:35:25,162 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:25,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-07-12 18:35:25,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:25,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 53 [2022-07-12 18:35:25,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:35:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 131 proven. 16 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-12 18:35:25,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:26,173 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7705 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem68#1.base| v_ArrVal_7705) |c_ULTIMATE.start_main_~g~0#1.base|) (bvadd |c_ULTIMATE.start_main_~g~0#1.offset| (_ bv8 32)))) (_ bv1 1))) is different from false [2022-07-12 18:35:26,180 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7705 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd |c_ULTIMATE.start_main_~g~0#1.offset| (_ bv8 32)))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~g~0#1.base|) .cse0) v_ArrVal_7705) |c_ULTIMATE.start_main_~g~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2022-07-12 18:35:26,188 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7705 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_#t~ret67#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~ret67#1.base|) .cse0) v_ArrVal_7705) |c_ULTIMATE.start_main_#t~ret67#1.base|) .cse0))) (_ bv1 1))) is different from false [2022-07-12 18:35:29,008 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7705 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_#res#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_#res#1.base|) .cse0) v_ArrVal_7705) |c_DUPFFnew_#res#1.base|) .cse0))))) is different from false [2022-07-12 18:35:29,019 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7705 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_~ans~0#1.base|) .cse0) v_ArrVal_7705) |c_DUPFFnew_~ans~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2022-07-12 18:35:29,467 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7700 (_ BitVec 32)) (v_ArrVal_7701 (_ BitVec 32)) (v_ArrVal_7705 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7702 (_ BitVec 32)) (v_ArrVal_7704 (_ BitVec 32)) (v_ArrVal_7694 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse2 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_DUPFFnew_~ans~0#1.base|) .cse2) v_ArrVal_7694))) (let ((.cse1 (select .cse0 |c_DUPFFnew_~ans~0#1.base|))) (store (store .cse0 |c_DUPFFnew_~ans~0#1.base| (store (store (store (store .cse1 (bvadd (_ bv4 32) |c_DUPFFnew_~ans~0#1.offset|) v_ArrVal_7700) (bvadd |c_DUPFFnew_~ans~0#1.offset| (_ bv5 32)) v_ArrVal_7701) (bvadd (_ bv6 32) |c_DUPFFnew_~ans~0#1.offset|) v_ArrVal_7702) (bvadd (_ bv7 32) |c_DUPFFnew_~ans~0#1.offset|) v_ArrVal_7704)) (select .cse1 .cse2) v_ArrVal_7705))) |c_DUPFFnew_~ans~0#1.base|) .cse2))) (_ bv1 1))) is different from false [2022-07-12 18:35:29,485 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:29,485 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 84 treesize of output 65 [2022-07-12 18:35:29,488 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 98 treesize of output 74 [2022-07-12 18:35:29,491 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 70 treesize of output 62 [2022-07-12 18:35:29,495 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 36 treesize of output 24 [2022-07-12 18:35:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 131 proven. 16 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-12 18:35:37,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:35:37,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056757680] [2022-07-12 18:35:37,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056757680] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:35:37,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:35:37,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2022-07-12 18:35:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658519783] [2022-07-12 18:35:37,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:35:37,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:35:37,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:35:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:35:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=669, Unknown=10, NotChecked=342, Total=1122 [2022-07-12 18:35:37,730 INFO L87 Difference]: Start difference. First operand 360 states and 454 transitions. Second operand has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 28 states have internal predecessors, (95), 7 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-12 18:35:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:40,076 INFO L93 Difference]: Finished difference Result 404 states and 516 transitions. [2022-07-12 18:35:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:35:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 28 states have internal predecessors, (95), 7 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 114 [2022-07-12 18:35:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:40,078 INFO L225 Difference]: With dead ends: 404 [2022-07-12 18:35:40,078 INFO L226 Difference]: Without dead ends: 404 [2022-07-12 18:35:40,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 183 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=172, Invalid=1248, Unknown=10, NotChecked=462, Total=1892 [2022-07-12 18:35:40,079 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 176 mSDsluCounter, 2703 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1928 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:40,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2952 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1027 Invalid, 0 Unknown, 1928 Unchecked, 1.8s Time] [2022-07-12 18:35:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-07-12 18:35:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 377. [2022-07-12 18:35:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 246 states have (on average 1.3089430894308942) internal successors, (322), 282 states have internal predecessors, (322), 74 states have call successors, (74), 26 states have call predecessors, (74), 26 states have return successors, (76), 74 states have call predecessors, (76), 74 states have call successors, (76) [2022-07-12 18:35:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 472 transitions. [2022-07-12 18:35:40,085 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 472 transitions. Word has length 114 [2022-07-12 18:35:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:40,085 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 472 transitions. [2022-07-12 18:35:40,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 28 states have internal predecessors, (95), 7 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-12 18:35:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 472 transitions. [2022-07-12 18:35:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-12 18:35:40,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:40,086 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:40,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:40,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:35:40,303 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting DUPFFexgcdErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, DUPFFnewErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-07-12 18:35:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:40,304 INFO L85 PathProgramCache]: Analyzing trace with hash 783105186, now seen corresponding path program 1 times [2022-07-12 18:35:40,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:35:40,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986153644] [2022-07-12 18:35:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:40,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:35:40,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:35:40,305 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:35:40,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-12 18:35:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 18:35:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:41,736 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 [2022-07-12 18:35:41,760 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:35:41,760 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 [2022-07-12 18:35:41,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-12 18:35:41,794 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 [2022-07-12 18:35:41,803 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 [2022-07-12 18:35:42,002 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,019 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 16 treesize of output 18 [2022-07-12 18:35:42,038 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,055 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 16 treesize of output 18 [2022-07-12 18:35:42,074 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,093 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 16 treesize of output 18 [2022-07-12 18:35:42,113 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,130 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 16 treesize of output 18 [2022-07-12 18:35:42,151 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:35:42,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:35:42,158 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 7 treesize of output 3 [2022-07-12 18:35:42,174 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,215 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,231 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 16 treesize of output 18 [2022-07-12 18:35:42,250 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:35:42,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:35:42,255 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 7 treesize of output 3 [2022-07-12 18:35:42,270 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,338 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,352 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 16 treesize of output 18 [2022-07-12 18:35:42,368 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,387 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 16 treesize of output 18 [2022-07-12 18:35:42,411 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:35:42,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 18:35:42,414 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 7 treesize of output 3 [2022-07-12 18:35:42,431 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,481 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-07-12 18:35:42,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,497 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 16 treesize of output 18 [2022-07-12 18:35:42,519 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-07-12 18:35:42,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 18:35:42,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 57 [2022-07-12 18:35:42,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-12 18:35:42,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2022-07-12 18:35:42,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-07-12 18:35:42,825 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:35:42,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-07-12 18:35:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,830 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 20 treesize of output 22 [2022-07-12 18:35:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 53 [2022-07-12 18:35:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:42,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-07-12 18:35:43,879 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 [2022-07-12 18:35:43,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:35:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 131 proven. 16 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-12 18:35:43,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:44,704 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8082 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem68#1.base| v_ArrVal_8082) |c_ULTIMATE.start_main_~g~0#1.base|) (bvadd |c_ULTIMATE.start_main_~g~0#1.offset| (_ bv8 32))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_8083 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8082 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~g~0#1.offset| (_ bv8 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem68#1.base| v_ArrVal_8082) |c_ULTIMATE.start_main_~g~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem68#1.base| v_ArrVal_8083) |c_ULTIMATE.start_main_~g~0#1.base|) .cse1)))))) is different from false [2022-07-12 18:35:44,727 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8082 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~g~0#1.offset| (_ bv8 32)))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~g~0#1.base|) .cse1) v_ArrVal_8082) |c_ULTIMATE.start_main_~g~0#1.base|) .cse1)))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_8083 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8082 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd |c_ULTIMATE.start_main_~g~0#1.offset| (_ bv8 32)))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~g~0#1.base|) .cse3))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_8082) |c_ULTIMATE.start_main_~g~0#1.base|) .cse3) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_8083) |c_ULTIMATE.start_main_~g~0#1.base|) .cse3))))))) is different from false [2022-07-12 18:35:44,750 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8082 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_#t~ret67#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~ret67#1.base|) .cse1) v_ArrVal_8082) |c_ULTIMATE.start_main_#t~ret67#1.base|) .cse1)))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_8083 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8082 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_#t~ret67#1.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~ret67#1.base|) .cse3))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_8082) |c_ULTIMATE.start_main_#t~ret67#1.base|) .cse3)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_8083) |c_ULTIMATE.start_main_#t~ret67#1.base|) .cse3))))))) is different from false