./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 ae007674 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-dev-ae00767 [2021-12-28 05:47:48,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:47:48,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:47:48,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:47:48,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:47:48,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:47:48,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:47:48,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:47:48,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:47:48,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:47:48,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:47:48,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:47:48,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:47:48,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:47:48,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:47:48,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:47:48,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:47:48,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:47:48,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:47:48,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:47:48,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:47:48,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:47:48,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:47:48,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:47:48,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:47:48,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:47:48,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:47:48,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:47:48,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:47:48,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:47:48,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:47:48,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:47:48,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:47:48,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:47:48,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:47:48,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:47:48,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:47:48,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:47:48,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:47:48,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:47:48,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:47:48,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:47:48,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:47:48,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:47:48,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:47:48,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:47:48,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:47:48,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:47:48,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:47:48,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:47:48,335 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:47:48,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:47:48,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:47:48,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:47:48,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:47:48,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:47:48,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:47:48,337 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:47:48,337 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:47:48,338 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:47:48,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:47:48,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:47:48,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:47:48,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:47:48,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:47:48,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:47:48,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:47:48,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:47:48,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:47:48,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:47:48,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:47:48,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:47:48,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2021-12-28 05:47:48,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:47:48,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:47:48,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:47:48,685 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:47:48,686 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:47:48,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2021-12-28 05:47:48,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd25e9b6/4995b5a108f243ccb460d7f9d6894731/FLAG694299c0e [2021-12-28 05:47:49,228 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:47:49,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2021-12-28 05:47:49,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd25e9b6/4995b5a108f243ccb460d7f9d6894731/FLAG694299c0e [2021-12-28 05:47:49,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd25e9b6/4995b5a108f243ccb460d7f9d6894731 [2021-12-28 05:47:49,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:47:49,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:47:49,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:47:49,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:47:49,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:47:49,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:47:49" (1/1) ... [2021-12-28 05:47:49,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b3eb8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:49, skipping insertion in model container [2021-12-28 05:47:49,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:47:49" (1/1) ... [2021-12-28 05:47:49,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:47:49,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:47:50,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:47:50,062 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-28 05:47:50,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e36a157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:50, skipping insertion in model container [2021-12-28 05:47:50,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:47:50,063 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-28 05:47:50,065 INFO L158 Benchmark]: Toolchain (without parser) took 523.29ms. Allocated memory is still 73.4MB. Free memory was 54.1MB in the beginning and 53.0MB in the end (delta: 1.0MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-12-28 05:47:50,066 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 73.4MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 60.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 05:47:50,066 INFO L158 Benchmark]: CACSL2BoogieTranslator took 517.21ms. Allocated memory is still 73.4MB. Free memory was 53.9MB in the beginning and 53.0MB in the end (delta: 873.8kB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-12-28 05:47:50,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 73.4MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 60.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 517.21ms. Allocated memory is still 73.4MB. Free memory was 53.9MB in the beginning and 53.0MB in the end (delta: 873.8kB). Peak memory consumption was 12.0MB. 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 where the value type is smaller than the cast-to type 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-dev-ae00767 [2021-12-28 05:47:51,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:47:51,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:47:51,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:47:51,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:47:51,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:47:51,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:47:51,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:47:51,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:47:51,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:47:51,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:47:51,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:47:51,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:47:51,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:47:51,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:47:51,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:47:51,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:47:51,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:47:52,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:47:52,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:47:52,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:47:52,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:47:52,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:47:52,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:47:52,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:47:52,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:47:52,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:47:52,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:47:52,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:47:52,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:47:52,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:47:52,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:47:52,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:47:52,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:47:52,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:47:52,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:47:52,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:47:52,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:47:52,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:47:52,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:47:52,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:47:52,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-28 05:47:52,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:47:52,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:47:52,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:47:52,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:47:52,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:47:52,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:47:52,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:47:52,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:47:52,069 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:47:52,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:47:52,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:47:52,070 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:47:52,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:47:52,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:47:52,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:47:52,071 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:47:52,071 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:47:52,071 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:47:52,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:47:52,071 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:47:52,072 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 05:47:52,072 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 05:47:52,072 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:47:52,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:47:52,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:47:52,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:47:52,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:47:52,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:47:52,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:47:52,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:47:52,073 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 05:47:52,073 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 05:47:52,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 05:47:52,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecdf6fdf9ec72145fabb79894bcc278b3e5646bc4893dbabc4bb180fa53c5ae [2021-12-28 05:47:52,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:47:52,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:47:52,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:47:52,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:47:52,396 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:47:52,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20020406-1.i [2021-12-28 05:47:52,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08bd957f/6844f96f7c4e4635a7cac85c2274aeaf/FLAG8bfa4c04a [2021-12-28 05:47:52,894 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:47:52,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20020406-1.i [2021-12-28 05:47:52,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08bd957f/6844f96f7c4e4635a7cac85c2274aeaf/FLAG8bfa4c04a [2021-12-28 05:47:52,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08bd957f/6844f96f7c4e4635a7cac85c2274aeaf [2021-12-28 05:47:52,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:47:52,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:47:52,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:47:52,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:47:52,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:47:52,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:47:52" (1/1) ... [2021-12-28 05:47:52,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc71c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:52, skipping insertion in model container [2021-12-28 05:47:52,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:47:52" (1/1) ... [2021-12-28 05:47:52,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:47:52,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:47:53,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:47:53,348 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-28 05:47:53,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:47:53,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:47:53,384 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:47:53,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:47:53,467 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:47:53,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53 WrapperNode [2021-12-28 05:47:53,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:47:53,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:47:53,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:47:53,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:47:53,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,516 INFO L137 Inliner]: procedures = 286, calls = 76, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-28 05:47:53,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:47:53,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:47:53,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:47:53,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:47:53,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:47:53,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:47:53,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:47:53,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:47:53,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (1/1) ... [2021-12-28 05:47:53,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:47:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:53,585 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) [2021-12-28 05:47:53,611 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 [2021-12-28 05:47:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFdeg [2021-12-28 05:47:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFdeg [2021-12-28 05:47:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-28 05:47:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:47:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 05:47:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFnew [2021-12-28 05:47:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFnew [2021-12-28 05:47:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFfree [2021-12-28 05:47:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFfree [2021-12-28 05:47:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFshift_add [2021-12-28 05:47:53,618 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFshift_add [2021-12-28 05:47:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:47:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-28 05:47:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-28 05:47:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure FFmul [2021-12-28 05:47:53,618 INFO L138 BoogieDeclarations]: Found implementation of procedure FFmul [2021-12-28 05:47:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFexgcd [2021-12-28 05:47:53,619 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFexgcd [2021-12-28 05:47:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 05:47:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 05:47:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 05:47:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFswap [2021-12-28 05:47:53,619 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFswap [2021-12-28 05:47:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure DUPFFcopy [2021-12-28 05:47:53,619 INFO L138 BoogieDeclarations]: Found implementation of procedure DUPFFcopy [2021-12-28 05:47:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:47:53,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:47:53,709 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:47:53,710 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:47:54,166 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:47:54,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:47:54,171 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 05:47:54,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:47:54 BoogieIcfgContainer [2021-12-28 05:47:54,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:47:54,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:47:54,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:47:54,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:47:54,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:47:52" (1/3) ... [2021-12-28 05:47:54,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bd06d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:47:54, skipping insertion in model container [2021-12-28 05:47:54,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:53" (2/3) ... [2021-12-28 05:47:54,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bd06d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:47:54, skipping insertion in model container [2021-12-28 05:47:54,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:47:54" (3/3) ... [2021-12-28 05:47:54,177 INFO L111 eAbstractionObserver]: Analyzing ICFG 20020406-1.i [2021-12-28 05:47:54,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:47:54,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-12-28 05:47:54,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:47:54,209 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 05:47:54,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-12-28 05:47:54,218 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) [2021-12-28 05:47:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-28 05:47:54,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:54,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-28 05:47:54,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting DUPFFnewErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 228226931, now seen corresponding path program 1 times [2021-12-28 05:47:54,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128189649] [2021-12-28 05:47:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:54,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:54,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:54,236 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) [2021-12-28 05:47:54,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 05:47:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:54,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 05:47:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:54,347 INFO L387 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 [2021-12-28 05:47:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:54,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:54,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:54,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128189649] [2021-12-28 05:47:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128189649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:54,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:54,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:47:54,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74012605] [2021-12-28 05:47:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:54,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:47:54,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:47:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:47:54,383 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) [2021-12-28 05:47:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:54,590 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2021-12-28 05:47:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:47:54,593 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 [2021-12-28 05:47:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:54,599 INFO L225 Difference]: With dead ends: 182 [2021-12-28 05:47:54,599 INFO L226 Difference]: Without dead ends: 180 [2021-12-28 05:47:54,600 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:47:54,602 INFO L933 BasicCegarLoop]: 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 [2021-12-28 05:47:54,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 344 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:47:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-28 05:47:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-12-28 05:47:54,638 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) [2021-12-28 05:47:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2021-12-28 05:47:54,642 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 5 [2021-12-28 05:47:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:54,642 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2021-12-28 05:47:54,642 INFO L471 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) [2021-12-28 05:47:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2021-12-28 05:47:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-28 05:47:54,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:54,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-28 05:47:54,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:54,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:47:54,850 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting DUPFFnewErr1REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash 228226932, now seen corresponding path program 1 times [2021-12-28 05:47:54,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080231551] [2021-12-28 05:47:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:54,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:54,853 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) [2021-12-28 05:47:54,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 05:47:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 05:47:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:54,924 INFO L387 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 [2021-12-28 05:47:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:54,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:54,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080231551] [2021-12-28 05:47:54,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080231551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:54,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:54,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:47:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668327322] [2021-12-28 05:47:54,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:54,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:47:54,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:47:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:47:54,934 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) [2021-12-28 05:47:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:55,159 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2021-12-28 05:47:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:47:55,159 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 [2021-12-28 05:47:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:55,162 INFO L225 Difference]: With dead ends: 184 [2021-12-28 05:47:55,162 INFO L226 Difference]: Without dead ends: 184 [2021-12-28 05:47:55,162 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:47:55,163 INFO L933 BasicCegarLoop]: 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 [2021-12-28 05:47:55,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:47:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-28 05:47:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2021-12-28 05:47:55,179 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) [2021-12-28 05:47:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 217 transitions. [2021-12-28 05:47:55,180 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 217 transitions. Word has length 5 [2021-12-28 05:47:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:55,181 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 217 transitions. [2021-12-28 05:47:55,181 INFO L471 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) [2021-12-28 05:47:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 217 transitions. [2021-12-28 05:47:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:47:55,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:55,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:55,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-28 05:47:55,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:47:55,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting DUPFFnewErr3REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:55,389 INFO L85 PathProgramCache]: Analyzing trace with hash 282747829, now seen corresponding path program 1 times [2021-12-28 05:47:55,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:55,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607266980] [2021-12-28 05:47:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:55,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:55,407 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) [2021-12-28 05:47:55,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 05:47:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 05:47:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:55,483 INFO L387 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 [2021-12-28 05:47:55,487 INFO L387 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 [2021-12-28 05:47:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:47:55,531 INFO L387 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 [2021-12-28 05:47:55,539 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:47:55,539 INFO L387 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 [2021-12-28 05:47:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:55,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:55,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:55,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607266980] [2021-12-28 05:47:55,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607266980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:55,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:55,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:47:55,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42420012] [2021-12-28 05:47:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:55,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:47:55,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:47:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:47:55,552 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) [2021-12-28 05:47:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:55,732 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2021-12-28 05:47:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:47:55,733 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 [2021-12-28 05:47:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:55,734 INFO L225 Difference]: With dead ends: 177 [2021-12-28 05:47:55,734 INFO L226 Difference]: Without dead ends: 177 [2021-12-28 05:47:55,734 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:47:55,735 INFO L933 BasicCegarLoop]: 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 [2021-12-28 05:47:55,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 342 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:47:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-28 05:47:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-12-28 05:47:55,741 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) [2021-12-28 05:47:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-12-28 05:47:55,742 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 7 [2021-12-28 05:47:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:55,743 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-12-28 05:47:55,743 INFO L471 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) [2021-12-28 05:47:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-12-28 05:47:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:47:55,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:55,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:55,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:55,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:47:55,951 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting DUPFFnewErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1865414411, now seen corresponding path program 1 times [2021-12-28 05:47:55,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:55,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433264610] [2021-12-28 05:47:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:55,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:55,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:55,957 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) [2021-12-28 05:47:55,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-28 05:47:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 05:47:56,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:56,059 INFO L387 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 [2021-12-28 05:47:56,079 INFO L387 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 [2021-12-28 05:47:56,102 INFO L387 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 [2021-12-28 05:47:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:56,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:56,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:56,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433264610] [2021-12-28 05:47:56,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433264610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:56,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:56,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:47:56,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962045717] [2021-12-28 05:47:56,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:56,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:47:56,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:47:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:47:56,121 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) [2021-12-28 05:47:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:56,552 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2021-12-28 05:47:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:47:56,553 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 [2021-12-28 05:47:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:56,554 INFO L225 Difference]: With dead ends: 186 [2021-12-28 05:47:56,554 INFO L226 Difference]: Without dead ends: 186 [2021-12-28 05:47:56,554 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:47:56,555 INFO L933 BasicCegarLoop]: 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 [2021-12-28 05:47:56,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 811 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:47:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-28 05:47:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2021-12-28 05:47:56,561 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) [2021-12-28 05:47:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2021-12-28 05:47:56,563 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 11 [2021-12-28 05:47:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:56,563 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2021-12-28 05:47:56,563 INFO L471 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) [2021-12-28 05:47:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2021-12-28 05:47:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-28 05:47:56,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:56,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:56,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:56,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:47:56,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1993271845, now seen corresponding path program 1 times [2021-12-28 05:47:56,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:56,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749007635] [2021-12-28 05:47:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:56,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:56,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:56,767 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) [2021-12-28 05:47:56,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-28 05:47:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:56,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:47:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:56,887 INFO L387 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 [2021-12-28 05:47:56,912 INFO L387 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 [2021-12-28 05:47:56,920 INFO L387 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 [2021-12-28 05:47:56,966 INFO L387 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 [2021-12-28 05:47:56,970 INFO L387 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 [2021-12-28 05:47:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:57,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:57,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:57,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749007635] [2021-12-28 05:47:57,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749007635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:57,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:57,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:47:57,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376438820] [2021-12-28 05:47:57,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:57,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:47:57,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:47:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:47:57,019 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) [2021-12-28 05:47:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:57,571 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2021-12-28 05:47:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:47:57,572 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 [2021-12-28 05:47:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:57,573 INFO L225 Difference]: With dead ends: 197 [2021-12-28 05:47:57,573 INFO L226 Difference]: Without dead ends: 197 [2021-12-28 05:47:57,573 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:47:57,574 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 50 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:57,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1053 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:47:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-28 05:47:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2021-12-28 05:47:57,583 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) [2021-12-28 05:47:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2021-12-28 05:47:57,585 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 12 [2021-12-28 05:47:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:57,585 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2021-12-28 05:47:57,585 INFO L471 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) [2021-12-28 05:47:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2021-12-28 05:47:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:47:57,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:57,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:57,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:57,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:47:57,787 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash 335042805, now seen corresponding path program 1 times [2021-12-28 05:47:57,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:57,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291433617] [2021-12-28 05:47:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:57,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:57,791 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) [2021-12-28 05:47:57,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-28 05:47:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 05:47:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:58,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:58,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:58,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291433617] [2021-12-28 05:47:58,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291433617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:58,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:58,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:47:58,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595010486] [2021-12-28 05:47:58,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:58,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:47:58,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:58,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:47:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:47:58,089 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) [2021-12-28 05:47:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:58,286 INFO L93 Difference]: Finished difference Result 209 states and 253 transitions. [2021-12-28 05:47:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:47:58,287 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 [2021-12-28 05:47:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:58,289 INFO L225 Difference]: With dead ends: 209 [2021-12-28 05:47:58,289 INFO L226 Difference]: Without dead ends: 203 [2021-12-28 05:47:58,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:47:58,290 INFO L933 BasicCegarLoop]: 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 [2021-12-28 05:47:58,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 757 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:47:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-28 05:47:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2021-12-28 05:47:58,297 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) [2021-12-28 05:47:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2021-12-28 05:47:58,299 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 21 [2021-12-28 05:47:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:58,299 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2021-12-28 05:47:58,299 INFO L471 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) [2021-12-28 05:47:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2021-12-28 05:47:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 05:47:58,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:58,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:58,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:58,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:47:58,510 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:58,510 INFO L85 PathProgramCache]: Analyzing trace with hash 370721495, now seen corresponding path program 1 times [2021-12-28 05:47:58,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:58,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98419225] [2021-12-28 05:47:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:58,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:58,517 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) [2021-12-28 05:47:58,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-28 05:47:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:47:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:58,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:58,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98419225] [2021-12-28 05:47:58,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98419225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:58,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:47:58,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-28 05:47:58,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574277254] [2021-12-28 05:47:58,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:58,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:47:58,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:47:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:47:58,893 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) [2021-12-28 05:47:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:59,299 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2021-12-28 05:47:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:47:59,299 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 [2021-12-28 05:47:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:59,300 INFO L225 Difference]: With dead ends: 246 [2021-12-28 05:47:59,301 INFO L226 Difference]: Without dead ends: 234 [2021-12-28 05:47:59,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:47:59,301 INFO L933 BasicCegarLoop]: 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:59,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1351 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:47:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-28 05:47:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2021-12-28 05:47:59,306 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) [2021-12-28 05:47:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 264 transitions. [2021-12-28 05:47:59,307 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 264 transitions. Word has length 22 [2021-12-28 05:47:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:59,307 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 264 transitions. [2021-12-28 05:47:59,307 INFO L471 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) [2021-12-28 05:47:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 264 transitions. [2021-12-28 05:47:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:47:59,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:59,308 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:59,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:59,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:47:59,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:47:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -843792011, now seen corresponding path program 2 times [2021-12-28 05:47:59,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:47:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586204282] [2021-12-28 05:47:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:47:59,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:47:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:47:59,516 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) [2021-12-28 05:47:59,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-28 05:47:59,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:47:59,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 05:47:59,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:47:59,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:59,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:47:59,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586204282] [2021-12-28 05:47:59,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586204282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:59,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:59,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:47:59,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095617067] [2021-12-28 05:47:59,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:59,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:47:59,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:47:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:47:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:47:59,672 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) [2021-12-28 05:47:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:59,957 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2021-12-28 05:47:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:47:59,957 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 [2021-12-28 05:47:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:59,959 INFO L225 Difference]: With dead ends: 214 [2021-12-28 05:47:59,959 INFO L226 Difference]: Without dead ends: 214 [2021-12-28 05:47:59,959 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:47:59,959 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 23 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:59,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 757 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:47:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-28 05:47:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-12-28 05:47:59,964 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) [2021-12-28 05:47:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2021-12-28 05:47:59,965 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 25 [2021-12-28 05:47:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:59,965 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2021-12-28 05:47:59,965 INFO L471 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) [2021-12-28 05:47:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2021-12-28 05:47:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:47:59,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:59,966 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:59,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:00,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:00,167 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:00,167 INFO L85 PathProgramCache]: Analyzing trace with hash -843792010, now seen corresponding path program 1 times [2021-12-28 05:48:00,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544312361] [2021-12-28 05:48:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:00,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:00,168 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) [2021-12-28 05:48:00,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-28 05:48:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:48:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:00,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544312361] [2021-12-28 05:48:00,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544312361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:00,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:48:00,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-28 05:48:00,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044888225] [2021-12-28 05:48:00,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:00,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 05:48:00,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 05:48:00,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:48:00,696 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) [2021-12-28 05:48:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:01,646 INFO L93 Difference]: Finished difference Result 285 states and 358 transitions. [2021-12-28 05:48:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-28 05:48:01,647 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 [2021-12-28 05:48:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:01,648 INFO L225 Difference]: With dead ends: 285 [2021-12-28 05:48:01,648 INFO L226 Difference]: Without dead ends: 267 [2021-12-28 05:48:01,649 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:48:01,649 INFO L933 BasicCegarLoop]: 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 [2021-12-28 05:48:01,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1817 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 05:48:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-28 05:48:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 222. [2021-12-28 05:48:01,655 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) [2021-12-28 05:48:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 268 transitions. [2021-12-28 05:48:01,656 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 268 transitions. Word has length 25 [2021-12-28 05:48:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:01,657 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 268 transitions. [2021-12-28 05:48:01,657 INFO L471 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) [2021-12-28 05:48:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 268 transitions. [2021-12-28 05:48:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 05:48:01,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:01,658 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:01,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-28 05:48:01,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:01,858 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash 168356342, now seen corresponding path program 2 times [2021-12-28 05:48:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:01,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665122049] [2021-12-28 05:48:01,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:48:01,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:01,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:01,860 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) [2021-12-28 05:48:01,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-28 05:48:01,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:48:01,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:48:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:48:01,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-28 05:48:02,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:48:02,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:02,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665122049] [2021-12-28 05:48:02,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665122049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:02,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:02,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:48:02,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603337210] [2021-12-28 05:48:02,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:02,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:48:02,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:48:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:48:02,126 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) [2021-12-28 05:48:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:02,464 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2021-12-28 05:48:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:48:02,464 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 [2021-12-28 05:48:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:02,465 INFO L225 Difference]: With dead ends: 220 [2021-12-28 05:48:02,465 INFO L226 Difference]: Without dead ends: 220 [2021-12-28 05:48:02,465 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:48:02,466 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:02,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 810 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:48:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-28 05:48:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-12-28 05:48:02,470 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) [2021-12-28 05:48:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 266 transitions. [2021-12-28 05:48:02,471 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 266 transitions. Word has length 29 [2021-12-28 05:48:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:02,471 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 266 transitions. [2021-12-28 05:48:02,471 INFO L471 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) [2021-12-28 05:48:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 266 transitions. [2021-12-28 05:48:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:48:02,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:02,472 INFO L514 BasicCegarLoop]: 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] [2021-12-28 05:48:02,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:02,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:02,679 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash 924079462, now seen corresponding path program 1 times [2021-12-28 05:48:02,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:02,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35728140] [2021-12-28 05:48:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:02,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:02,696 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) [2021-12-28 05:48:02,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-28 05:48:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-28 05:48:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:02,924 INFO L387 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 [2021-12-28 05:48:02,961 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-28 05:48:02,961 INFO L387 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 [2021-12-28 05:48:02,994 INFO L387 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 [2021-12-28 05:48:03,144 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,145 INFO L387 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 [2021-12-28 05:48:03,179 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,180 INFO L387 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 [2021-12-28 05:48:03,213 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,213 INFO L387 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 [2021-12-28 05:48:03,247 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,248 INFO L387 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 [2021-12-28 05:48:03,281 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,282 INFO L387 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 [2021-12-28 05:48:03,311 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,312 INFO L387 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 [2021-12-28 05:48:03,341 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,341 INFO L387 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 [2021-12-28 05:48:03,372 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:03,373 INFO L387 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 [2021-12-28 05:48:03,488 INFO L353 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2021-12-28 05:48:03,489 INFO L387 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 [2021-12-28 05:48:03,595 INFO L353 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2021-12-28 05:48:03,596 INFO L387 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 [2021-12-28 05:48:03,700 INFO L387 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 [2021-12-28 05:48:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 05:48:03,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:05,465 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$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 [2021-12-28 05:48:05,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:48:05,488 INFO L387 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 [2021-12-28 05:48:05,490 INFO L387 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 [2021-12-28 05:48:05,493 INFO L387 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 [2021-12-28 05:48:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 05:48:13,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35728140] [2021-12-28 05:48:13,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35728140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:13,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:48:13,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-28 05:48:13,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21565802] [2021-12-28 05:48:13,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:13,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 05:48:13,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 05:48:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=4, NotChecked=36, Total=420 [2021-12-28 05:48:13,332 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) [2021-12-28 05:48:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:14,447 INFO L93 Difference]: Finished difference Result 219 states and 265 transitions. [2021-12-28 05:48:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:48:14,447 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 [2021-12-28 05:48:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:14,448 INFO L225 Difference]: With dead ends: 219 [2021-12-28 05:48:14,448 INFO L226 Difference]: Without dead ends: 219 [2021-12-28 05:48:14,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=4, NotChecked=44, Total=600 [2021-12-28 05:48:14,449 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 34 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:14,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 2140 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 497 Invalid, 0 Unknown, 407 Unchecked, 0.9s Time] [2021-12-28 05:48:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-28 05:48:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-12-28 05:48:14,453 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) [2021-12-28 05:48:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2021-12-28 05:48:14,454 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 30 [2021-12-28 05:48:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:14,454 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2021-12-28 05:48:14,454 INFO L471 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) [2021-12-28 05:48:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2021-12-28 05:48:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:48:14,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:14,455 INFO L514 BasicCegarLoop]: 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] [2021-12-28 05:48:14,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:14,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:14,655 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 924079463, now seen corresponding path program 1 times [2021-12-28 05:48:14,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:14,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109979516] [2021-12-28 05:48:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:14,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:14,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:14,657 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) [2021-12-28 05:48:14,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-28 05:48:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:14,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-28 05:48:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:14,901 INFO L387 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 [2021-12-28 05:48:14,926 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:48:14,926 INFO L387 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 [2021-12-28 05:48:14,930 INFO L387 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 [2021-12-28 05:48:14,954 INFO L387 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 [2021-12-28 05:48:14,964 INFO L387 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 [2021-12-28 05:48:15,146 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:48:15,147 INFO L387 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 [2021-12-28 05:48:15,155 INFO L387 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 [2021-12-28 05:48:15,175 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,176 INFO L387 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 [2021-12-28 05:48:15,224 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,224 INFO L387 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 [2021-12-28 05:48:15,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,241 INFO L387 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 [2021-12-28 05:48:15,288 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,289 INFO L387 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 [2021-12-28 05:48:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,304 INFO L387 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 [2021-12-28 05:48:15,326 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,326 INFO L387 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 [2021-12-28 05:48:15,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,341 INFO L387 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 [2021-12-28 05:48:15,366 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:48:15,366 INFO L387 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 [2021-12-28 05:48:15,373 INFO L387 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 [2021-12-28 05:48:15,407 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,407 INFO L387 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 [2021-12-28 05:48:15,451 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,451 INFO L387 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 [2021-12-28 05:48:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,463 INFO L387 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 [2021-12-28 05:48:15,493 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,493 INFO L387 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 [2021-12-28 05:48:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,509 INFO L387 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 [2021-12-28 05:48:15,566 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:48:15,567 INFO L387 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 [2021-12-28 05:48:15,574 INFO L387 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 [2021-12-28 05:48:15,688 INFO L353 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2021-12-28 05:48:15,688 INFO L387 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 [2021-12-28 05:48:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,701 INFO L387 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 [2021-12-28 05:48:15,782 INFO L353 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2021-12-28 05:48:15,784 INFO L387 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 [2021-12-28 05:48:15,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,804 INFO L387 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 [2021-12-28 05:48:15,936 INFO L387 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 [2021-12-28 05:48:15,939 INFO L387 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 [2021-12-28 05:48:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 05:48:15,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:42,539 WARN L228 SmtUtils]: Spent 26.39s on a formula simplification that was a NOOP. DAG size: 194 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-12-28 05:48:49,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:48:49,383 INFO L387 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 [2021-12-28 05:48:49,387 INFO L387 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 [2021-12-28 05:48:49,406 INFO L387 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 [2021-12-28 05:48:49,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:48:49,427 INFO L387 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 [2021-12-28 05:48:49,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:48:49,440 INFO L387 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 [2021-12-28 05:48:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:48:49,462 INFO L387 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 [2021-12-28 05:48:49,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:48:49,468 INFO L387 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 [2021-12-28 05:48:49,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 05:48:49,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109979516] [2021-12-28 05:48:49,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109979516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:49,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:48:49,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-28 05:48:49,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386958537] [2021-12-28 05:48:49,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:49,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 05:48:49,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 05:48:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=358, Unknown=7, NotChecked=0, Total=420 [2021-12-28 05:48:49,707 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) [2021-12-28 05:48:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:53,185 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2021-12-28 05:48:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:48:53,187 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 [2021-12-28 05:48:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:53,188 INFO L225 Difference]: With dead ends: 220 [2021-12-28 05:48:53,188 INFO L226 Difference]: Without dead ends: 220 [2021-12-28 05:48:53,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=106, Invalid=643, Unknown=7, NotChecked=0, Total=756 [2021-12-28 05:48:53,188 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 27 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:53,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2102 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 761 Invalid, 0 Unknown, 287 Unchecked, 2.5s Time] [2021-12-28 05:48:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-28 05:48:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2021-12-28 05:48:53,192 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) [2021-12-28 05:48:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 264 transitions. [2021-12-28 05:48:53,193 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 264 transitions. Word has length 30 [2021-12-28 05:48:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 264 transitions. [2021-12-28 05:48:53,193 INFO L471 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) [2021-12-28 05:48:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 264 transitions. [2021-12-28 05:48:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-28 05:48:53,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:53,194 INFO L514 BasicCegarLoop]: 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] [2021-12-28 05:48:53,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:53,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:53,394 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting DUPFFnewErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2092985884, now seen corresponding path program 1 times [2021-12-28 05:48:53,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:53,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011757003] [2021-12-28 05:48:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:53,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:53,396 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) [2021-12-28 05:48:53,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-28 05:48:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:48:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:53,710 INFO L387 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 [2021-12-28 05:48:53,736 INFO L387 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 [2021-12-28 05:48:53,749 INFO L387 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 [2021-12-28 05:48:53,784 INFO L387 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 [2021-12-28 05:48:53,787 INFO L387 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 [2021-12-28 05:48:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-28 05:48:53,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:48:53,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:53,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011757003] [2021-12-28 05:48:53,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011757003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:53,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:53,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:48:53,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704910422] [2021-12-28 05:48:53,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:53,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:48:53,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:48:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:48:53,828 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) [2021-12-28 05:48:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:54,317 INFO L93 Difference]: Finished difference Result 230 states and 271 transitions. [2021-12-28 05:48:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:48:54,340 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 [2021-12-28 05:48:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:54,341 INFO L225 Difference]: With dead ends: 230 [2021-12-28 05:48:54,341 INFO L226 Difference]: Without dead ends: 218 [2021-12-28 05:48:54,341 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:48:54,342 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 58 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:54,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 753 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:48:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-28 05:48:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2021-12-28 05:48:54,345 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) [2021-12-28 05:48:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 249 transitions. [2021-12-28 05:48:54,346 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 249 transitions. Word has length 42 [2021-12-28 05:48:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:54,346 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 249 transitions. [2021-12-28 05:48:54,346 INFO L471 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) [2021-12-28 05:48:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 249 transitions. [2021-12-28 05:48:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 05:48:54,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:54,347 INFO L514 BasicCegarLoop]: 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] [2021-12-28 05:48:54,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:54,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:54,549 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:54,549 INFO L85 PathProgramCache]: Analyzing trace with hash -562772518, now seen corresponding path program 1 times [2021-12-28 05:48:54,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:54,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666651511] [2021-12-28 05:48:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:54,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:54,551 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) [2021-12-28 05:48:54,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-28 05:48:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 05:48:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-28 05:48:55,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-28 05:48:55,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:55,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666651511] [2021-12-28 05:48:55,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666651511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:55,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:48:55,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-28 05:48:55,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102721989] [2021-12-28 05:48:55,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:55,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 05:48:55,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 05:48:55,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-12-28 05:48:55,522 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) [2021-12-28 05:48:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:57,239 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2021-12-28 05:48:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 05:48:57,240 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 [2021-12-28 05:48:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:57,242 INFO L225 Difference]: With dead ends: 291 [2021-12-28 05:48:57,242 INFO L226 Difference]: Without dead ends: 279 [2021-12-28 05:48:57,242 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:48:57,242 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 239 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:57,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 2177 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 05:48:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-28 05:48:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 220. [2021-12-28 05:48:57,248 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) [2021-12-28 05:48:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2021-12-28 05:48:57,249 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 56 [2021-12-28 05:48:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:57,249 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2021-12-28 05:48:57,249 INFO L471 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) [2021-12-28 05:48:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2021-12-28 05:48:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-28 05:48:57,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:57,250 INFO L514 BasicCegarLoop]: 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] [2021-12-28 05:48:57,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:57,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:57,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093162, now seen corresponding path program 2 times [2021-12-28 05:48:57,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478539457] [2021-12-28 05:48:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:48:57,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:57,462 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) [2021-12-28 05:48:57,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-28 05:48:57,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:48:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:48:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 05:48:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-28 05:48:57,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:48:57,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:57,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478539457] [2021-12-28 05:48:57,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478539457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:57,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:57,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:48:57,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019998982] [2021-12-28 05:48:57,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:57,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:48:57,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:48:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:48:57,725 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) [2021-12-28 05:48:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:58,100 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2021-12-28 05:48:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:48:58,101 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 [2021-12-28 05:48:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:58,102 INFO L225 Difference]: With dead ends: 218 [2021-12-28 05:48:58,102 INFO L226 Difference]: Without dead ends: 218 [2021-12-28 05:48:58,102 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:48:58,102 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:58,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 738 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:48:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-28 05:48:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-12-28 05:48:58,105 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) [2021-12-28 05:48:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2021-12-28 05:48:58,106 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 63 [2021-12-28 05:48:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:58,106 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2021-12-28 05:48:58,106 INFO L471 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) [2021-12-28 05:48:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2021-12-28 05:48:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-28 05:48:58,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:58,107 INFO L514 BasicCegarLoop]: 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] [2021-12-28 05:48:58,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:58,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:58,310 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2097093161, now seen corresponding path program 1 times [2021-12-28 05:48:58,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:58,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5375606] [2021-12-28 05:48:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:58,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:58,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:58,312 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) [2021-12-28 05:48:58,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-28 05:48:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:48:58,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-28 05:48:58,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:48:58,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 05:48:58,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5375606] [2021-12-28 05:48:58,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5375606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:58,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:58,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:48:58,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16554644] [2021-12-28 05:48:58,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:58,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:48:58,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 05:48:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:48:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:48:58,904 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) [2021-12-28 05:48:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:59,383 INFO L93 Difference]: Finished difference Result 216 states and 252 transitions. [2021-12-28 05:48:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:48:59,384 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 [2021-12-28 05:48:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:59,385 INFO L225 Difference]: With dead ends: 216 [2021-12-28 05:48:59,385 INFO L226 Difference]: Without dead ends: 216 [2021-12-28 05:48:59,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:48:59,386 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 25 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:59,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 788 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 05:48:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-28 05:48:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-12-28 05:48:59,389 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) [2021-12-28 05:48:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 252 transitions. [2021-12-28 05:48:59,390 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 252 transitions. Word has length 63 [2021-12-28 05:48:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:59,390 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 252 transitions. [2021-12-28 05:48:59,390 INFO L471 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) [2021-12-28 05:48:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 252 transitions. [2021-12-28 05:48:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 05:48:59,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:59,391 INFO L514 BasicCegarLoop]: 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] [2021-12-28 05:48:59,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:59,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 05:48:59,601 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [DUPFFnewErr0REQUIRES_VIOLATION, DUPFFnewErr1REQUIRES_VIOLATION, DUPFFnewErr2REQUIRES_VIOLATION, DUPFFnewErr3REQUIRES_VIOLATION (and 51 more)] === [2021-12-28 05:48:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:59,602 INFO L85 PathProgramCache]: Analyzing trace with hash -585378383, now seen corresponding path program 1 times [2021-12-28 05:48:59,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 05:48:59,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719329950] [2021-12-28 05:48:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:59,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 05:48:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 05:48:59,605 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) [2021-12-28 05:48:59,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-28 05:49:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-28 05:49:00,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:00,318 INFO L387 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 [2021-12-28 05:49:00,348 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-28 05:49:00,348 INFO L387 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 [2021-12-28 05:49:00,377 INFO L387 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 [2021-12-28 05:49:00,501 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,502 INFO L387 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 [2021-12-28 05:49:00,525 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,525 INFO L387 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 [2021-12-28 05:49:00,547 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,547 INFO L387 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 [2021-12-28 05:49:00,578 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,579 INFO L387 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 [2021-12-28 05:49:00,609 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,610 INFO L387 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 [2021-12-28 05:49:00,642 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,642 INFO L387 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 [2021-12-28 05:49:00,686 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,687 INFO L387 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 [2021-12-28 05:49:00,707 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,708 INFO L387 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 [2021-12-28 05:49:00,732 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,733 INFO L387 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 [2021-12-28 05:49:00,755 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,755 INFO L387 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 [2021-12-28 05:49:00,785 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,785 INFO L387 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 [2021-12-28 05:49:00,801 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 05:49:00,802 INFO L387 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 [2021-12-28 05:49:00,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,848 INFO L387 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 [2021-12-28 05:49:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:00,866 INFO L387 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 [2021-12-28 05:49:00,933 INFO L387 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 [2021-12-28 05:49:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 131 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-28 05:49:00,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:03,030 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1933 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_DUPFFnew_~ans~0#1.offset|))) (select (select (store |c_#memory_$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 [2021-12-28 05:49:03,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:49:03,041 INFO L387 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 [2021-12-28 05:49:03,043 INFO L387 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 [2021-12-28 05:49:03,045 INFO L387 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