./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-properties/list_search-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version c3fed411 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/list-properties/list_search-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:19:31,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:19:31,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:19:31,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:19:31,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:19:31,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:19:31,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:19:31,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:19:31,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:19:31,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:19:31,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:19:31,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:19:31,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:19:32,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:19:32,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:19:32,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:19:32,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:19:32,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:19:32,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:19:32,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:19:32,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:19:32,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:19:32,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:19:32,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:19:32,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:19:32,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:19:32,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:19:32,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:19:32,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:19:32,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:19:32,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:19:32,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:19:32,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:19:32,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:19:32,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:19:32,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:19:32,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:19:32,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:19:32,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:19:32,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:19:32,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:19:32,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-12-18 19:19:32,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:19:32,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:19:32,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:19:32,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:19:32,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:19:32,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:19:32,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:19:32,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:19:32,056 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:19:32,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:19:32,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:19:32,057 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:19:32,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:19:32,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:19:32,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:19:32,057 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:19:32,057 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:19:32,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:19:32,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:19:32,058 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:19:32,058 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:19:32,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:19:32,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:19:32,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:19:32,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:19:32,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:19:32,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:19:32,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:19:32,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:19:32,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:19:32,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2021-12-18 19:19:32,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:19:32,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:19:32,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:19:32,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:19:32,272 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:19:32,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-1.i [2021-12-18 19:19:32,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8158e46/de2650f25c0744298092b05ae898e50a/FLAGd25ed5f60 [2021-12-18 19:19:32,698 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:19:32,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i [2021-12-18 19:19:32,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8158e46/de2650f25c0744298092b05ae898e50a/FLAGd25ed5f60 [2021-12-18 19:19:32,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8158e46/de2650f25c0744298092b05ae898e50a [2021-12-18 19:19:32,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:19:32,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:19:32,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:19:32,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:19:32,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:19:32,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:19:32" (1/1) ... [2021-12-18 19:19:32,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e63cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:32, skipping insertion in model container [2021-12-18 19:19:32,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:19:32" (1/1) ... [2021-12-18 19:19:32,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:19:32,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:19:32,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-12-18 19:19:32,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:19:32,976 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) [2021-12-18 19:19:32,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ed5e7b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:32, skipping insertion in model container [2021-12-18 19:19:32,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:19:32,978 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 19:19:32,979 INFO L158 Benchmark]: Toolchain (without parser) took 245.44ms. Allocated memory is still 104.9MB. Free memory was 66.2MB in the beginning and 78.2MB in the end (delta: -12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 19:19:32,980 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:19:32,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.29ms. Allocated memory is still 104.9MB. Free memory was 66.0MB in the beginning and 78.2MB in the end (delta: -12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 19:19:32,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.29ms. Allocated memory is still 104.9MB. Free memory was 66.0MB in the beginning and 78.2MB in the end (delta: -12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 542]: 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/list-properties/list_search-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:19:34,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:19:34,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:19:34,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:19:34,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:19:34,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:19:34,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:19:34,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:19:34,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:19:34,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:19:34,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:19:34,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:19:34,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:19:34,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:19:34,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:19:34,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:19:34,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:19:34,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:19:34,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:19:34,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:19:34,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:19:34,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:19:34,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:19:34,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:19:34,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:19:34,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:19:34,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:19:34,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:19:34,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:19:34,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:19:34,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:19:34,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:19:34,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:19:34,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:19:34,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:19:34,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:19:34,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:19:34,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:19:34,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:19:34,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:19:34,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:19:34,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-12-18 19:19:34,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:19:34,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:19:34,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:19:34,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:19:34,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:19:34,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:19:34,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:19:34,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:19:34,541 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:19:34,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:19:34,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:19:34,542 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:19:34,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:19:34,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:19:34,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:19:34,543 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:19:34,543 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:19:34,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:19:34,543 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:19:34,544 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 19:19:34,544 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 19:19:34,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:19:34,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:19:34,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:19:34,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:19:34,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:19:34,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:19:34,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:19:34,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:19:34,545 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 19:19:34,545 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 19:19:34,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:19:34,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 19:19:34,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2021-12-18 19:19:34,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:19:34,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:19:34,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:19:34,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:19:34,831 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:19:34,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-1.i [2021-12-18 19:19:34,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a344e4ae/1f33ef94dfd745d69a4eada0a2fc2269/FLAGddb11e734 [2021-12-18 19:19:35,316 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:19:35,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i [2021-12-18 19:19:35,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a344e4ae/1f33ef94dfd745d69a4eada0a2fc2269/FLAGddb11e734 [2021-12-18 19:19:35,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a344e4ae/1f33ef94dfd745d69a4eada0a2fc2269 [2021-12-18 19:19:35,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:19:35,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:19:35,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:19:35,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:19:35,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:19:35,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:19:35" (1/1) ... [2021-12-18 19:19:35,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1428b377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:35, skipping insertion in model container [2021-12-18 19:19:35,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:19:35" (1/1) ... [2021-12-18 19:19:35,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:19:35,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:19:35,883 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-12-18 19:19:35,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:19:35,986 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 19:19:35,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:19:35,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-12-18 19:19:36,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:19:36,018 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:19:36,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-12-18 19:19:36,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:19:36,088 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:19:36,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36 WrapperNode [2021-12-18 19:19:36,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:19:36,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:19:36,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:19:36,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:19:36,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,136 INFO L137 Inliner]: procedures = 128, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2021-12-18 19:19:36,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:19:36,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:19:36,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:19:36,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:19:36,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:19:36,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:19:36,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:19:36,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:19:36,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (1/1) ... [2021-12-18 19:19:36,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:19:36,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:19:36,211 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) [2021-12-18 19:19:36,220 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 [2021-12-18 19:19:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 19:19:36,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 19:19:36,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 19:19:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 19:19:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 19:19:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2021-12-18 19:19:36,244 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2021-12-18 19:19:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:19:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 19:19:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 19:19:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:19:36,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:19:36,331 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:19:36,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:19:36,541 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:19:36,545 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:19:36,547 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 19:19:36,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:19:36 BoogieIcfgContainer [2021-12-18 19:19:36,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:19:36,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:19:36,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:19:36,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:19:36,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:19:35" (1/3) ... [2021-12-18 19:19:36,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392675bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:19:36, skipping insertion in model container [2021-12-18 19:19:36,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:36" (2/3) ... [2021-12-18 19:19:36,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392675bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:19:36, skipping insertion in model container [2021-12-18 19:19:36,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:19:36" (3/3) ... [2021-12-18 19:19:36,555 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2021-12-18 19:19:36,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:19:36,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-12-18 19:19:36,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:19:36,596 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 [2021-12-18 19:19:36,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-12-18 19:19:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:19:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-18 19:19:36,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:36,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-18 19:19:36,633 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting insert_listErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash 48806309, now seen corresponding path program 1 times [2021-12-18 19:19:36,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:36,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475035456] [2021-12-18 19:19:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:36,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:36,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:36,662 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) [2021-12-18 19:19:36,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 19:19:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 19:19:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:36,856 INFO L388 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 [2021-12-18 19:19:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:36,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:36,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:36,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475035456] [2021-12-18 19:19:36,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475035456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:36,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:36,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:19:36,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836083757] [2021-12-18 19:19:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:36,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:19:36,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:19:36,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:19:36,899 INFO L87 Difference]: Start difference. First operand has 63 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 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) [2021-12-18 19:19:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:37,000 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-18 19:19:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:19:37,002 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 [2021-12-18 19:19:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:37,007 INFO L225 Difference]: With dead ends: 59 [2021-12-18 19:19:37,007 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:19:37,008 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 [2021-12-18 19:19:37,012 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:37,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 90 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:19:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:19:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:19:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 51 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:19:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-12-18 19:19:37,037 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 5 [2021-12-18 19:19:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:37,038 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-12-18 19:19:37,038 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) [2021-12-18 19:19:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-12-18 19:19:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-18 19:19:37,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:37,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-18 19:19:37,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-18 19:19:37,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:37,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting insert_listErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 48806310, now seen corresponding path program 1 times [2021-12-18 19:19:37,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:37,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370117855] [2021-12-18 19:19:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:37,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:37,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:37,249 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) [2021-12-18 19:19:37,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 19:19:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:19:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:37,331 INFO L388 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 [2021-12-18 19:19:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:37,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:37,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370117855] [2021-12-18 19:19:37,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370117855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:37,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:37,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:19:37,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174401796] [2021-12-18 19:19:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:37,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:19:37,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:19:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:19:37,349 INFO L87 Difference]: Start difference. First operand 57 states and 63 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) [2021-12-18 19:19:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:37,429 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-18 19:19:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:19:37,430 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 [2021-12-18 19:19:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:37,431 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:19:37,431 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:19:37,432 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 [2021-12-18 19:19:37,432 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:37,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:19:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:19:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:19:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.457142857142857) internal successors, (51), 47 states have internal predecessors, (51), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:19:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-12-18 19:19:37,445 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 5 [2021-12-18 19:19:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:37,445 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-12-18 19:19:37,445 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) [2021-12-18 19:19:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-12-18 19:19:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:19:37,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:37,448 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:37,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-18 19:19:37,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:37,654 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1546335105, now seen corresponding path program 1 times [2021-12-18 19:19:37,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566085213] [2021-12-18 19:19:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:37,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:37,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:37,658 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) [2021-12-18 19:19:37,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 19:19:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:19:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 19:19:37,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 19:19:37,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:37,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566085213] [2021-12-18 19:19:37,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566085213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:37,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:19:37,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-18 19:19:37,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304393950] [2021-12-18 19:19:37,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:37,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:19:37,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:19:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:19:37,995 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:19:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:38,163 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-12-18 19:19:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:19:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-18 19:19:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:38,166 INFO L225 Difference]: With dead ends: 72 [2021-12-18 19:19:38,166 INFO L226 Difference]: Without dead ends: 72 [2021-12-18 19:19:38,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:19:38,167 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 98 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:38,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 162 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:19:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-18 19:19:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-12-18 19:19:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-12-18 19:19:38,173 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 41 [2021-12-18 19:19:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:38,173 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-12-18 19:19:38,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:19:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-12-18 19:19:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 19:19:38,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:38,175 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:38,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:38,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:38,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1413963380, now seen corresponding path program 1 times [2021-12-18 19:19:38,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:38,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073498882] [2021-12-18 19:19:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:38,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:38,386 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) [2021-12-18 19:19:38,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 19:19:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:19:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:38,624 INFO L388 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 [2021-12-18 19:19:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:19:38,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:38,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073498882] [2021-12-18 19:19:38,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073498882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:38,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:38,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:19:38,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652815980] [2021-12-18 19:19:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:19:38,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:19:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:19:38,657 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:38,847 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-12-18 19:19:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:19:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-18 19:19:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:38,848 INFO L225 Difference]: With dead ends: 90 [2021-12-18 19:19:38,848 INFO L226 Difference]: Without dead ends: 90 [2021-12-18 19:19:38,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:19:38,849 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:38,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:19:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-18 19:19:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2021-12-18 19:19:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.425531914893617) internal successors, (67), 58 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-12-18 19:19:38,853 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 44 [2021-12-18 19:19:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:38,854 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-12-18 19:19:38,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-12-18 19:19:38,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 19:19:38,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:38,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:38,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-18 19:19:39,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:39,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:39,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1413963379, now seen corresponding path program 1 times [2021-12-18 19:19:39,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:39,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134808934] [2021-12-18 19:19:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:39,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:39,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:39,067 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) [2021-12-18 19:19:39,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 19:19:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:19:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:39,272 INFO L388 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 [2021-12-18 19:19:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:19:39,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:39,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:39,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134808934] [2021-12-18 19:19:39,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134808934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:39,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:39,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:19:39,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455071385] [2021-12-18 19:19:39,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:39,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:19:39,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:39,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:19:39,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:19:39,359 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:39,538 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-12-18 19:19:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:19:39,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-18 19:19:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:39,539 INFO L225 Difference]: With dead ends: 106 [2021-12-18 19:19:39,539 INFO L226 Difference]: Without dead ends: 106 [2021-12-18 19:19:39,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:19:39,540 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:39,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 91 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:19:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-18 19:19:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2021-12-18 19:19:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 63 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-12-18 19:19:39,544 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 44 [2021-12-18 19:19:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:39,544 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-12-18 19:19:39,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-12-18 19:19:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 19:19:39,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:39,545 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:39,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-18 19:19:39,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:39,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1662023696, now seen corresponding path program 1 times [2021-12-18 19:19:39,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:39,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622598592] [2021-12-18 19:19:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:39,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:39,756 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) [2021-12-18 19:19:39,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 19:19:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:39,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:19:39,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:19:40,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:40,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622598592] [2021-12-18 19:19:40,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622598592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:40,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:40,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:19:40,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471862570] [2021-12-18 19:19:40,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:40,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:19:40,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:19:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:19:40,054 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:40,254 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-12-18 19:19:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:19:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-12-18 19:19:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:40,259 INFO L225 Difference]: With dead ends: 106 [2021-12-18 19:19:40,259 INFO L226 Difference]: Without dead ends: 106 [2021-12-18 19:19:40,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:19:40,260 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 109 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:40,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 164 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:19:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-18 19:19:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2021-12-18 19:19:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 63 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-12-18 19:19:40,264 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 47 [2021-12-18 19:19:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:40,264 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-12-18 19:19:40,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-12-18 19:19:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 19:19:40,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:40,265 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:40,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:40,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:40,476 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:40,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1825916083, now seen corresponding path program 1 times [2021-12-18 19:19:40,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:40,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56774473] [2021-12-18 19:19:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:40,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:40,479 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) [2021-12-18 19:19:40,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 19:19:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:19:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:40,724 INFO L388 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 [2021-12-18 19:19:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:19:40,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:40,848 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56774473] [2021-12-18 19:19:40,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56774473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:40,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:40,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:19:40,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14460471] [2021-12-18 19:19:40,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:40,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:19:40,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:19:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:19:40,849 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:41,169 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-12-18 19:19:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:19:41,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-12-18 19:19:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:41,173 INFO L225 Difference]: With dead ends: 105 [2021-12-18 19:19:41,173 INFO L226 Difference]: Without dead ends: 105 [2021-12-18 19:19:41,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:19:41,173 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 147 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:41,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 139 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:19:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-18 19:19:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2021-12-18 19:19:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 66 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-12-18 19:19:41,177 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 49 [2021-12-18 19:19:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:41,178 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-12-18 19:19:41,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:41,178 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-12-18 19:19:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 19:19:41,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:41,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:41,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-18 19:19:41,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:41,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:41,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:41,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1825916084, now seen corresponding path program 1 times [2021-12-18 19:19:41,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:41,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588816375] [2021-12-18 19:19:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:41,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:41,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:41,390 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) [2021-12-18 19:19:41,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 19:19:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:41,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:19:41,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:41,634 INFO L388 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 [2021-12-18 19:19:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:19:41,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:41,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:41,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588816375] [2021-12-18 19:19:41,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588816375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:41,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:41,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:19:41,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209503893] [2021-12-18 19:19:41,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:41,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:19:41,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:41,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:19:41,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:19:41,694 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:41,938 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-12-18 19:19:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:19:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-12-18 19:19:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:41,939 INFO L225 Difference]: With dead ends: 96 [2021-12-18 19:19:41,939 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 19:19:41,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:19:41,940 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 125 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:41,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 132 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:19:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 19:19:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-12-18 19:19:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 69 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2021-12-18 19:19:41,948 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 49 [2021-12-18 19:19:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:41,948 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2021-12-18 19:19:41,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2021-12-18 19:19:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:19:41,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:41,954 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:41,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:42,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:42,155 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:42,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1986857552, now seen corresponding path program 1 times [2021-12-18 19:19:42,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:42,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11399325] [2021-12-18 19:19:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:42,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:42,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:42,157 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) [2021-12-18 19:19:42,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 19:19:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 19:19:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:42,519 INFO L388 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 [2021-12-18 19:19:42,655 INFO L388 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 [2021-12-18 19:19:42,744 INFO L354 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2021-12-18 19:19:42,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-12-18 19:19:42,832 INFO L388 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 13 [2021-12-18 19:19:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:42,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:43,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:43,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11399325] [2021-12-18 19:19:43,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11399325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:43,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:19:43,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-12-18 19:19:43,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284741442] [2021-12-18 19:19:43,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:43,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:19:43,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:19:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:19:43,190 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 19:19:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:43,474 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-12-18 19:19:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:19:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-12-18 19:19:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:43,476 INFO L225 Difference]: With dead ends: 118 [2021-12-18 19:19:43,476 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 19:19:43,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:19:43,477 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 350 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:43,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 295 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 191 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2021-12-18 19:19:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 19:19:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2021-12-18 19:19:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 74 states have internal predecessors, (85), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-12-18 19:19:43,480 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 51 [2021-12-18 19:19:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:43,481 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-12-18 19:19:43,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 19:19:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-12-18 19:19:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:19:43,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:43,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:43,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:43,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:43,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1986857553, now seen corresponding path program 1 times [2021-12-18 19:19:43,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:43,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144967917] [2021-12-18 19:19:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:43,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:43,696 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) [2021-12-18 19:19:43,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 19:19:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:19:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:44,046 INFO L388 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 [2021-12-18 19:19:44,179 INFO L388 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 [2021-12-18 19:19:44,185 INFO L388 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 [2021-12-18 19:19:44,264 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-12-18 19:19:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 19:19:44,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 19:19:44,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:19:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:44,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:44,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144967917] [2021-12-18 19:19:44,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144967917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532954110] [2021-12-18 19:19:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:44,933 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:19:44,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:19:44,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:19:44,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-18 19:19:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:19:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:45,409 INFO L388 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 [2021-12-18 19:19:45,414 INFO L388 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 [2021-12-18 19:19:45,668 INFO L388 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 [2021-12-18 19:19:45,673 INFO L388 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 [2021-12-18 19:19:45,854 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 19:19:45,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2021-12-18 19:19:45,868 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:19:45,868 INFO L388 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 20 treesize of output 20 [2021-12-18 19:19:46,025 INFO L388 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 [2021-12-18 19:19:46,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:19:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:46,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532954110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:46,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:19:46,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-18 19:19:46,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110304174] [2021-12-18 19:19:46,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:46,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:19:46,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:19:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:19:46,525 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:19:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:47,778 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2021-12-18 19:19:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:19:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-12-18 19:19:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:47,779 INFO L225 Difference]: With dead ends: 152 [2021-12-18 19:19:47,779 INFO L226 Difference]: Without dead ends: 152 [2021-12-18 19:19:47,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 19:19:47,780 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 331 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:47,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 396 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 437 Invalid, 0 Unknown, 154 Unchecked, 0.6s Time] [2021-12-18 19:19:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-18 19:19:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 84. [2021-12-18 19:19:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 77 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-12-18 19:19:47,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 51 [2021-12-18 19:19:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-12-18 19:19:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:19:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-12-18 19:19:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:19:47,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:47,784 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:47,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:48,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:19:48,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash -105219752, now seen corresponding path program 1 times [2021-12-18 19:19:48,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:48,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410439261] [2021-12-18 19:19:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:48,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:48,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:48,202 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) [2021-12-18 19:19:48,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 19:19:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:48,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:19:48,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:48,626 INFO L354 Elim1Store]: treesize reduction 157, result has 14.7 percent of original size [2021-12-18 19:19:48,627 INFO L388 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 3 case distinctions, treesize of input 27 treesize of output 36 [2021-12-18 19:19:48,643 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 19:19:48,643 INFO L388 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 22 treesize of output 21 [2021-12-18 19:19:48,691 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-18 19:19:48,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 13 [2021-12-18 19:19:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:19:48,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:19:48,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:48,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410439261] [2021-12-18 19:19:48,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410439261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:48,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:48,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 19:19:48,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022683905] [2021-12-18 19:19:48,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:48,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:19:48,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:19:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:19:48,731 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:48,930 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-12-18 19:19:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:19:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-12-18 19:19:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:48,932 INFO L225 Difference]: With dead ends: 81 [2021-12-18 19:19:48,932 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 19:19:48,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:19:48,933 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:48,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 286 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-12-18 19:19:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 19:19:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-18 19:19:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 74 states have internal predecessors, (84), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:19:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-12-18 19:19:48,936 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 52 [2021-12-18 19:19:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:48,937 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-12-18 19:19:48,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:19:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-12-18 19:19:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 19:19:48,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:48,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:48,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-18 19:19:49,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:49,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1534863564, now seen corresponding path program 1 times [2021-12-18 19:19:49,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:49,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625878646] [2021-12-18 19:19:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:49,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:49,145 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) [2021-12-18 19:19:49,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 19:19:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:49,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 19:19:49,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:49,425 INFO L388 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 [2021-12-18 19:19:49,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 19:19:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:49,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:49,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625878646] [2021-12-18 19:19:49,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625878646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:49,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:19:49,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-12-18 19:19:49,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309031949] [2021-12-18 19:19:49,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:49,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 19:19:49,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 19:19:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:19:49,838 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 19:19:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:50,686 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-12-18 19:19:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:19:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2021-12-18 19:19:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:50,688 INFO L225 Difference]: With dead ends: 123 [2021-12-18 19:19:50,688 INFO L226 Difference]: Without dead ends: 123 [2021-12-18 19:19:50,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:19:50,689 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 257 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:50,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 360 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:19:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-18 19:19:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 82. [2021-12-18 19:19:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.296875) internal successors, (83), 75 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:19:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-12-18 19:19:50,691 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 54 [2021-12-18 19:19:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:50,692 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-12-18 19:19:50,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 19:19:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-12-18 19:19:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 19:19:50,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:50,692 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:50,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:50,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:50,901 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 527248649, now seen corresponding path program 1 times [2021-12-18 19:19:50,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:50,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895776835] [2021-12-18 19:19:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:50,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:50,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:50,911 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) [2021-12-18 19:19:50,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 19:19:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 19:19:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:51,210 INFO L388 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 [2021-12-18 19:19:51,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:19:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:51,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:51,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 19:19:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:19:52,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:52,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895776835] [2021-12-18 19:19:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895776835] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:52,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:19:52,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-12-18 19:19:52,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595721587] [2021-12-18 19:19:52,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:52,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 19:19:52,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 19:19:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:19:52,469 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:19:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:54,634 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-12-18 19:19:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:19:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-12-18 19:19:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:54,635 INFO L225 Difference]: With dead ends: 139 [2021-12-18 19:19:54,635 INFO L226 Difference]: Without dead ends: 139 [2021-12-18 19:19:54,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:19:54,636 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 570 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:54,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 440 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 19:19:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-18 19:19:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 82. [2021-12-18 19:19:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.28125) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:19:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-12-18 19:19:54,639 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 56 [2021-12-18 19:19:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:54,640 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-12-18 19:19:54,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:19:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-12-18 19:19:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 19:19:54,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:54,640 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:54,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:54,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:19:54,851 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:19:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash -69599988, now seen corresponding path program 2 times [2021-12-18 19:19:54,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:19:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134612910] [2021-12-18 19:19:54,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:19:54,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:19:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:19:54,852 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) [2021-12-18 19:19:54,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 19:19:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:19:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:19:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:19:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:55,288 INFO L388 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 [2021-12-18 19:19:55,376 INFO L388 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 [2021-12-18 19:19:55,451 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:19:55,451 INFO L388 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 26 treesize of output 39 [2021-12-18 19:19:55,696 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:19:55,716 INFO L388 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 [2021-12-18 19:19:55,870 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 19:19:55,870 INFO L388 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 56 treesize of output 60 [2021-12-18 19:19:55,885 INFO L354 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2021-12-18 19:19:55,885 INFO L388 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 1 case distinctions, treesize of input 26 treesize of output 31 [2021-12-18 19:19:55,900 INFO L388 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 41 treesize of output 21 [2021-12-18 19:19:56,224 INFO L388 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 89 treesize of output 73 [2021-12-18 19:19:56,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:19:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 49 [2021-12-18 19:19:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:56,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:57,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:19:57,203 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-12-18 19:19:57,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_114 (_ BitVec 32)) (v_arrayElimArr_2 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| v_~head~0.base_114 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_114 v_arrayElimArr_2) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))))) (_ bv1 1))) (not (= (select v_arrayElimArr_2 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-18 19:19:57,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:19:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134612910] [2021-12-18 19:19:57,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134612910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772679122] [2021-12-18 19:19:57,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:19:57,216 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:19:57,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:19:57,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:19:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-18 19:19:57,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:19:57,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:19:57,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 19:19:57,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:57,767 INFO L388 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 [2021-12-18 19:19:57,899 INFO L388 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 [2021-12-18 19:19:58,072 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:19:58,072 INFO L388 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 26 treesize of output 39 [2021-12-18 19:19:58,405 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:19:58,411 INFO L388 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 [2021-12-18 19:19:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:19:58,621 INFO L388 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 56 treesize of output 52 [2021-12-18 19:19:58,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:19:58,645 INFO L354 Elim1Store]: treesize reduction 69, result has 41.5 percent of original size [2021-12-18 19:19:58,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 81 [2021-12-18 19:19:59,016 INFO L388 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 79 treesize of output 59 [2021-12-18 19:19:59,351 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:19:59,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 37 [2021-12-18 19:19:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:59,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:59,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:19:59,849 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-12-18 19:19:59,866 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_120 (_ BitVec 32)) (v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_4 (_ bv4 32)) c_~head~0.base)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_120))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| v_~head~0.base_120 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_120 v_arrayElimArr_4) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))))) (_ bv1 1))))) is different from false [2021-12-18 19:19:59,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772679122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:59,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:19:59,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-12-18 19:19:59,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034781647] [2021-12-18 19:19:59,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:59,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:19:59,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:19:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:19:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1277, Unknown=5, NotChecked=146, Total=1560 [2021-12-18 19:19:59,870 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 30 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 19:20:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:00,355 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-12-18 19:20:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:20:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 30 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2021-12-18 19:20:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:00,357 INFO L225 Difference]: With dead ends: 95 [2021-12-18 19:20:00,357 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 19:20:00,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=195, Invalid=1612, Unknown=7, NotChecked=166, Total=1980 [2021-12-18 19:20:00,357 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:00,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 609 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 367 Unchecked, 0.2s Time] [2021-12-18 19:20:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 19:20:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2021-12-18 19:20:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 79 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-12-18 19:20:00,360 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 58 [2021-12-18 19:20:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:00,360 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-12-18 19:20:00,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 30 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 19:20:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-12-18 19:20:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 19:20:00,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:00,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:00,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:00,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-18 19:20:00,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:20:00,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:20:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash -69599987, now seen corresponding path program 2 times [2021-12-18 19:20:00,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:20:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534947878] [2021-12-18 19:20:00,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:00,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:20:00,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:20:00,771 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) [2021-12-18 19:20:00,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 19:20:01,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:01,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 19:20:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:01,233 INFO L388 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 [2021-12-18 19:20:01,237 INFO L388 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 [2021-12-18 19:20:01,451 INFO L388 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 [2021-12-18 19:20:01,457 INFO L388 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 [2021-12-18 19:20:01,592 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:20:01,594 INFO L388 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 26 treesize of output 39 [2021-12-18 19:20:01,604 INFO L388 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 18 treesize of output 20 [2021-12-18 19:20:01,892 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:01,900 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:02,088 INFO L388 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 53 treesize of output 43 [2021-12-18 19:20:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:02,101 INFO L354 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2021-12-18 19:20:02,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-12-18 19:20:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:02,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:02,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 19:20:02,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:02,711 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:20:02,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2021-12-18 19:20:02,720 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:02,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 19:20:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:03,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:03,837 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2021-12-18 19:20:03,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:03,846 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2021-12-18 19:20:03,860 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:03,936 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:04,027 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_126 (_ BitVec 32)) (v_arrayElimArr_7 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_8 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_126))) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_126 v_arrayElimArr_8) c_~head~0.base) .cse1))) (let ((.cse0 (bvadd .cse2 (_ bv4 32)))) (and (bvule .cse0 (select (store |c_#length| v_~head~0.base_126 (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_126 v_arrayElimArr_7) c_~head~0.base) .cse1))) (bvule .cse2 .cse0))))) (not (= (select v_arrayElimArr_8 (_ bv4 32)) c_~head~0.offset)) (not (= (select v_arrayElimArr_7 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-18 19:20:04,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:20:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534947878] [2021-12-18 19:20:04,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534947878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [777540566] [2021-12-18 19:20:04,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:04,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:20:04,032 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:20:04,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-12-18 19:20:04,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:04,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 19:20:04,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:04,585 INFO L388 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 [2021-12-18 19:20:04,589 INFO L388 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 [2021-12-18 19:20:04,748 INFO L388 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 [2021-12-18 19:20:04,754 INFO L388 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 [2021-12-18 19:20:04,825 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 19:20:04,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2021-12-18 19:20:04,844 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:20:04,844 INFO L388 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 26 treesize of output 39 [2021-12-18 19:20:05,085 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:05,093 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:05,191 INFO L388 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 53 treesize of output 43 [2021-12-18 19:20:05,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:05,203 INFO L354 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2021-12-18 19:20:05,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-12-18 19:20:05,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 19:20:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:05,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:05,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:05,659 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:20:05,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2021-12-18 19:20:05,675 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:05,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 19:20:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:05,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:06,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:06,119 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2021-12-18 19:20:06,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:06,158 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2021-12-18 19:20:06,170 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:06,296 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:06,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_132 (_ BitVec 32)) (v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_11 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_12 (_ bv4 32)) c_~head~0.offset)) (let ((.cse2 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_132 v_arrayElimArr_12) c_~head~0.base) .cse2))) (let ((.cse1 (bvadd .cse0 (_ bv4 32)))) (and (bvule .cse0 .cse1) (bvule .cse1 (select (store |c_#length| v_~head~0.base_132 (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_132 v_arrayElimArr_11) c_~head~0.base) .cse2))))))) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_132))))) is different from false [2021-12-18 19:20:06,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [777540566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:06,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:06,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-12-18 19:20:06,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287640925] [2021-12-18 19:20:06,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:06,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:20:06,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:20:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:20:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=591, Unknown=5, NotChecked=98, Total=756 [2021-12-18 19:20:06,357 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:20:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:07,517 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-12-18 19:20:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:20:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2021-12-18 19:20:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:07,519 INFO L225 Difference]: With dead ends: 102 [2021-12-18 19:20:07,519 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 19:20:07,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=129, Invalid=1124, Unknown=15, NotChecked=138, Total=1406 [2021-12-18 19:20:07,520 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 27 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:07,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 517 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2021-12-18 19:20:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 19:20:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-12-18 19:20:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 79 states have internal predecessors, (87), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-12-18 19:20:07,523 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 58 [2021-12-18 19:20:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:07,523 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-12-18 19:20:07,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:20:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-12-18 19:20:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 19:20:07,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:07,524 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:07,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:07,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-18 19:20:07,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:20:07,937 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:20:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash 569105948, now seen corresponding path program 1 times [2021-12-18 19:20:07,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:20:07,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731527725] [2021-12-18 19:20:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:07,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:20:07,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:20:07,939 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:20:07,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 19:20:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:08,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 19:20:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:08,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-12-18 19:20:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:08,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 60 [2021-12-18 19:20:08,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-12-18 19:20:08,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 56 [2021-12-18 19:20:08,712 INFO L388 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 [2021-12-18 19:20:08,715 INFO L388 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 [2021-12-18 19:20:08,856 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 19:20:08,856 INFO L388 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 89 treesize of output 77 [2021-12-18 19:20:08,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:08,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 13 [2021-12-18 19:20:09,260 INFO L388 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 83 treesize of output 59 [2021-12-18 19:20:09,263 INFO L388 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 70 treesize of output 46 [2021-12-18 19:20:09,560 INFO L354 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2021-12-18 19:20:09,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 56 [2021-12-18 19:20:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 19:20:09,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:10,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:10,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 75 [2021-12-18 19:20:10,279 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_138 (_ BitVec 32)) (v_arrayElimArr_15 (Array (_ BitVec 32) (_ BitVec 8)))) (or (not (= (select v_arrayElimArr_15 (_ bv0 32)) (_ bv3 8))) (not (= (select v_arrayElimArr_15 (_ bv2 32)) (_ bv0 8))) (not (= (select v_arrayElimArr_15 (_ bv3 32)) (_ bv0 8))) (not (= (select v_arrayElimArr_15 (_ bv1 32)) (_ bv0 8))) (not (= (let ((.cse0 (select (store |c_#memory_int| v_~head~0.base_138 v_arrayElimArr_15) c_~head~0.base))) (concat (concat (concat (select .cse0 (bvadd c_~head~0.offset (_ bv3 32))) (select .cse0 (bvadd c_~head~0.offset (_ bv2 32)))) (select .cse0 (bvadd c_~head~0.offset (_ bv1 32)))) (select .cse0 c_~head~0.offset))) (_ bv2 32))))) is different from false [2021-12-18 19:20:10,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:20:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731527725] [2021-12-18 19:20:10,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731527725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821246506] [2021-12-18 19:20:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:10,281 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:10,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:20:10,282 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:20:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-12-18 19:20:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:10,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 19:20:10,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:10,838 INFO L388 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 [2021-12-18 19:20:10,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-12-18 19:20:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:10,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-12-18 19:20:11,388 INFO L388 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 [2021-12-18 19:20:11,392 INFO L388 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 [2021-12-18 19:20:11,589 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 19:20:11,589 INFO L388 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 59 treesize of output 47 [2021-12-18 19:20:11,617 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:20:11,617 INFO L388 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 20 treesize of output 20 [2021-12-18 19:20:11,885 INFO L388 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 60 treesize of output 36 [2021-12-18 19:20:11,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:12,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:12,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:12,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:12,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:12,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 34 [2021-12-18 19:20:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:20:12,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:12,410 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_144 (_ BitVec 32)) (v_ArrVal_2652 (Array (_ BitVec 32) (_ BitVec 8)))) (or (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_144))) (not (= (let ((.cse0 (select (store |c_#memory_int| v_~head~0.base_144 v_ArrVal_2652) c_~head~0.base))) (concat (concat (concat (select .cse0 (bvadd c_~head~0.offset (_ bv3 32))) (select .cse0 (bvadd c_~head~0.offset (_ bv2 32)))) (select .cse0 (bvadd c_~head~0.offset (_ bv1 32)))) (select .cse0 c_~head~0.offset))) (_ bv2 32))))) is different from false [2021-12-18 19:20:12,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821246506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:12,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:12,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-12-18 19:20:12,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841668863] [2021-12-18 19:20:12,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:12,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:20:12,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:20:12,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:20:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1375, Unknown=6, NotChecked=150, Total=1640 [2021-12-18 19:20:12,413 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:20:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:14,227 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-12-18 19:20:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:20:14,228 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2021-12-18 19:20:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:14,228 INFO L225 Difference]: With dead ends: 91 [2021-12-18 19:20:14,228 INFO L226 Difference]: Without dead ends: 91 [2021-12-18 19:20:14,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=250, Invalid=2608, Unknown=12, NotChecked=210, Total=3080 [2021-12-18 19:20:14,229 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:14,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 755 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 342 Invalid, 0 Unknown, 234 Unchecked, 0.5s Time] [2021-12-18 19:20:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-18 19:20:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-12-18 19:20:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-12-18 19:20:14,232 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 59 [2021-12-18 19:20:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:14,232 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-12-18 19:20:14,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 19:20:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-12-18 19:20:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 19:20:14,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:14,233 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:14,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:14,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:14,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:14,638 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:20:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2137373797, now seen corresponding path program 1 times [2021-12-18 19:20:14,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:20:14,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472694862] [2021-12-18 19:20:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:14,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:20:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:20:14,639 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:20:14,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 19:20:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 19:20:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-18 19:20:14,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:20:14,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:20:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472694862] [2021-12-18 19:20:14,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472694862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:14,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:14,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:20:14,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153843766] [2021-12-18 19:20:14,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:14,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:20:14,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:20:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:20:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:14,945 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:20:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:14,951 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-12-18 19:20:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:20:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-12-18 19:20:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:14,951 INFO L225 Difference]: With dead ends: 84 [2021-12-18 19:20:14,952 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 19:20:14,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:14,952 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:14,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 19:20:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-18 19:20:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 77 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-12-18 19:20:14,955 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 59 [2021-12-18 19:20:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:14,955 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-12-18 19:20:14,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:20:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-12-18 19:20:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:20:14,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:14,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:14,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:15,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:20:15,164 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:20:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1015974627, now seen corresponding path program 1 times [2021-12-18 19:20:15,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:20:15,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557486642] [2021-12-18 19:20:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:15,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:20:15,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:20:15,166 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:20:15,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 19:20:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-18 19:20:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:15,636 INFO L388 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 [2021-12-18 19:20:15,640 INFO L388 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 [2021-12-18 19:20:15,829 INFO L388 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 [2021-12-18 19:20:15,833 INFO L388 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 [2021-12-18 19:20:15,962 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:20:15,962 INFO L388 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 26 treesize of output 39 [2021-12-18 19:20:15,971 INFO L388 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 18 treesize of output 20 [2021-12-18 19:20:16,258 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:16,266 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:16,419 INFO L388 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 53 treesize of output 43 [2021-12-18 19:20:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:16,439 INFO L354 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2021-12-18 19:20:16,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-12-18 19:20:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:16,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:16,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 19:20:17,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:17,055 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:20:17,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2021-12-18 19:20:17,065 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 19:20:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:17,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:18,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:18,236 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2021-12-18 19:20:18,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:18,244 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2021-12-18 19:20:18,264 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:18,336 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:18,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_18 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_19 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_150 (_ BitVec 32))) (or (not (= (select v_arrayElimArr_18 (_ bv4 32)) c_~head~0.base)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_150))) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_150 v_arrayElimArr_19) c_~head~0.base) .cse1))) (let ((.cse0 (bvadd .cse2 (_ bv8 32)))) (and (bvule .cse0 (select (store |c_#length| v_~head~0.base_150 (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_150 v_arrayElimArr_18) c_~head~0.base) .cse1))) (bvule (bvadd .cse2 (_ bv4 32)) .cse0))))) (not (= (select v_arrayElimArr_19 (_ bv4 32)) c_~head~0.offset)))) is different from false [2021-12-18 19:20:18,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:20:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557486642] [2021-12-18 19:20:18,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557486642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [217339332] [2021-12-18 19:20:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:18,436 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:18,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:20:18,437 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:20:18,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-18 19:20:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:20:19,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:19,201 INFO L388 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 [2021-12-18 19:20:19,204 INFO L388 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 [2021-12-18 19:20:19,366 INFO L388 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 [2021-12-18 19:20:19,369 INFO L388 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 [2021-12-18 19:20:19,428 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:20:19,429 INFO L388 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 26 treesize of output 39 [2021-12-18 19:20:19,440 INFO L388 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 18 treesize of output 20 [2021-12-18 19:20:19,821 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:19,826 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:20,072 INFO L388 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 71 treesize of output 61 [2021-12-18 19:20:20,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-18 19:20:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:20,085 INFO L388 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 26 treesize of output 28 [2021-12-18 19:20:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:20,097 INFO L354 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2021-12-18 19:20:20,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-12-18 19:20:20,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:20,808 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:20:20,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 50 [2021-12-18 19:20:20,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2021-12-18 19:20:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:20,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:21,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:21,332 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2021-12-18 19:20:21,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:21,338 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2021-12-18 19:20:21,368 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:21,477 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:21,624 INFO L388 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 6 treesize of output 4 [2021-12-18 19:20:21,643 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_156 (_ BitVec 32)) (v_arrayElimArr_22 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_23 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_156))) (not (= (select v_arrayElimArr_23 (_ bv4 32)) c_~head~0.offset)) (not (= (select v_arrayElimArr_22 (_ bv4 32)) c_~head~0.base)) (and (forall ((v_ArrVal_3125 (_ BitVec 32))) (let ((.cse0 (bvadd c_~head~0.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_156 v_arrayElimArr_23) c_~head~0.base) .cse0) (_ bv8 32)) (select (store |c_#length| v_~head~0.base_156 v_ArrVal_3125) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_156 v_arrayElimArr_22) c_~head~0.base) .cse0))))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_156 v_arrayElimArr_23) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32))))))) is different from false [2021-12-18 19:20:21,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [217339332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:21,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:21,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-12-18 19:20:21,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038398185] [2021-12-18 19:20:21,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:21,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 19:20:21,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:20:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 19:20:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1154, Unknown=15, NotChecked=138, Total=1406 [2021-12-18 19:20:21,647 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 26 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 19:20:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:22,881 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-12-18 19:20:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:20:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 26 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2021-12-18 19:20:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:22,884 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:20:22,884 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 19:20:22,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=180, Invalid=1866, Unknown=32, NotChecked=178, Total=2256 [2021-12-18 19:20:22,885 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:22,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 640 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 187 Invalid, 0 Unknown, 451 Unchecked, 0.2s Time] [2021-12-18 19:20:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 19:20:22,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2021-12-18 19:20:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 80 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-12-18 19:20:22,887 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 61 [2021-12-18 19:20:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:22,888 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-12-18 19:20:22,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 26 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 19:20:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-12-18 19:20:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:20:22,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:22,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:22,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-12-18 19:20:23,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:23,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:20:23,295 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:20:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1021799568, now seen corresponding path program 2 times [2021-12-18 19:20:23,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:20:23,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193846916] [2021-12-18 19:20:23,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:23,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:20:23,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:20:23,297 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:20:23,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 19:20:23,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:23,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 19:20:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:23,802 INFO L388 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 [2021-12-18 19:20:23,972 INFO L388 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 [2021-12-18 19:20:23,977 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:24,064 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 19:20:24,065 INFO L388 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 1 case distinctions, treesize of input 19 treesize of output 29 [2021-12-18 19:20:24,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:24,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:24,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2021-12-18 19:20:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:24,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:24,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:24,678 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-12-18 19:20:24,686 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_25 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_162 (_ BitVec 32))) (or (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_162 v_arrayElimArr_25) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))) (not (= (select v_arrayElimArr_25 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-18 19:20:24,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:20:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193846916] [2021-12-18 19:20:24,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193846916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [550561470] [2021-12-18 19:20:24,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:24,688 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:24,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:20:24,689 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:20:24,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-18 19:20:25,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:25,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:25,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 19:20:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:25,254 INFO L388 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 [2021-12-18 19:20:25,307 INFO L388 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 [2021-12-18 19:20:25,673 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:25,680 INFO L388 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 [2021-12-18 19:20:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:25,830 INFO L388 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 19 treesize of output 21 [2021-12-18 19:20:25,838 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:20:25,839 INFO L388 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 20 treesize of output 20 [2021-12-18 19:20:25,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:26,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 19:20:26,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-12-18 19:20:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:26,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:26,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:26,368 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-12-18 19:20:26,384 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_168 (_ BitVec 32)) (v_arrayElimArr_27 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_168 v_arrayElimArr_27) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_168))) (not (= (select v_arrayElimArr_27 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-18 19:20:26,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [550561470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:26,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:26,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2021-12-18 19:20:26,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720395473] [2021-12-18 19:20:26,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:26,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:20:26,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:20:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:20:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1302, Unknown=5, NotChecked=146, Total=1560 [2021-12-18 19:20:26,387 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 19:20:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:27,439 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2021-12-18 19:20:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:20:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-12-18 19:20:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:27,440 INFO L225 Difference]: With dead ends: 96 [2021-12-18 19:20:27,440 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 19:20:27,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=2693, Unknown=17, NotChecked=214, Total=3192 [2021-12-18 19:20:27,441 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 27 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:27,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 839 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 316 Invalid, 0 Unknown, 173 Unchecked, 0.4s Time] [2021-12-18 19:20:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 19:20:27,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2021-12-18 19:20:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 80 states have internal predecessors, (85), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-12-18 19:20:27,447 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 61 [2021-12-18 19:20:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:27,447 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-12-18 19:20:27,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 19:20:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-12-18 19:20:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:20:27,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:27,448 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:27,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:27,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:27,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:27,860 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:20:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash -357187888, now seen corresponding path program 3 times [2021-12-18 19:20:27,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:20:27,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025528040] [2021-12-18 19:20:27,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:20:27,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:20:27,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:20:27,862 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:20:27,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 19:20:28,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:20:28,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:28,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 19:20:28,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:28,768 INFO L388 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 [2021-12-18 19:20:28,879 INFO L388 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 [2021-12-18 19:20:28,959 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:20:28,959 INFO L388 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 26 treesize of output 39 [2021-12-18 19:20:29,154 INFO L388 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 [2021-12-18 19:20:29,159 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,280 INFO L388 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 56 treesize of output 52 [2021-12-18 19:20:29,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,301 INFO L354 Elim1Store]: treesize reduction 69, result has 41.5 percent of original size [2021-12-18 19:20:29,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 80 [2021-12-18 19:20:29,639 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:29,647 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,817 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-12-18 19:20:29,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 95 [2021-12-18 19:20:29,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,824 INFO L388 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 132 treesize of output 110 [2021-12-18 19:20:29,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,853 INFO L354 Elim1Store]: treesize reduction 93, result has 41.1 percent of original size [2021-12-18 19:20:29,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 118 [2021-12-18 19:20:30,758 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-12-18 19:20:30,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 122 [2021-12-18 19:20:31,170 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-18 19:20:31,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 60 [2021-12-18 19:20:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:31,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:32,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:32,284 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-18 19:20:32,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:32,295 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2021-12-18 19:20:32,337 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_31 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_174 (_ BitVec 32)) (v_arrayElimArr_32 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_32 (_ bv4 32)) c_~head~0.offset)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_174))) (= (_ bv0 1) (bvadd (select (store |c_#valid| v_~head~0.base_174 (_ bv1 1)) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_~head~0.base_174 v_arrayElimArr_31))) (select .cse0 (select (select .cse0 c_~head~0.base) .cse1))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_174 v_arrayElimArr_32) c_~head~0.base) .cse1) (_ bv4 32))))) (_ bv1 1))) (not (= (select v_arrayElimArr_31 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-18 19:20:32,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:20:32,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025528040] [2021-12-18 19:20:32,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025528040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:32,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [345977315] [2021-12-18 19:20:32,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:20:32,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:20:32,340 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:20:32,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-18 19:20:33,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:20:33,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:33,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 19:20:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:33,259 INFO L388 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 [2021-12-18 19:20:33,410 INFO L388 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 [2021-12-18 19:20:33,587 INFO L354 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2021-12-18 19:20:33,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-12-18 19:20:33,677 INFO L388 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 [2021-12-18 19:20:33,929 INFO L388 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 [2021-12-18 19:20:33,933 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:34,173 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 19:20:34,173 INFO L388 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 24 treesize of output 34 [2021-12-18 19:20:34,193 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-12-18 19:20:34,193 INFO L388 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 3 case distinctions, treesize of input 31 treesize of output 42 [2021-12-18 19:20:34,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 19:20:34,780 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:34,787 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:35,145 INFO L354 Elim1Store]: treesize reduction 189, result has 31.0 percent of original size [2021-12-18 19:20:35,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 112 [2021-12-18 19:20:35,163 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-12-18 19:20:35,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 61 [2021-12-18 19:20:35,169 INFO L388 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 18 treesize of output 20 [2021-12-18 19:20:35,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:36,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:36,234 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2021-12-18 19:20:36,871 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-18 19:20:36,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 80 [2021-12-18 19:20:36,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:36,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 19:20:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:37,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:39,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:39,072 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 131 [2021-12-18 19:20:39,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:39,080 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 126 [2021-12-18 19:20:39,209 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_36 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_37 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_180 (_ BitVec 32))) (let ((.cse5 (store |c_#memory_$Pointer$.base| v_~head~0.base_180 v_arrayElimArr_36)) (.cse6 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_180 v_arrayElimArr_37) c_~head~0.base) .cse6)) (.cse3 (select (select .cse5 c_~head~0.base) .cse6))) (let ((.cse1 (select (store |c_#length| v_~head~0.base_180 (_ bv8 32)) .cse3)) (.cse2 (store |c_#valid| v_~head~0.base_180 (_ bv1 1))) (.cse0 (bvadd .cse4 (_ bv4 32)))) (or (not (= (select v_arrayElimArr_36 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_37 (_ bv4 32)) c_~head~0.offset)) (not (bvule .cse0 .cse1)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_180))) (not (= (_ bv0 1) (bvadd (select .cse2 .cse3) (_ bv1 1)))) (not (bvule (bvadd .cse4 (_ bv8 32)) .cse1)) (not (bvule .cse4 .cse0)) (= (_ bv0 1) (bvadd (select .cse2 (select (select .cse5 .cse3) .cse0)) (_ bv1 1)))))))) is different from false [2021-12-18 19:20:39,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [345977315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:39,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:39,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2021-12-18 19:20:39,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617390015] [2021-12-18 19:20:39,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:39,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 19:20:39,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:20:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 19:20:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=4336, Unknown=27, NotChecked=270, Total=4970 [2021-12-18 19:20:39,214 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 48 states have internal predecessors, (105), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 19:20:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:41,323 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-12-18 19:20:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:20:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 48 states have internal predecessors, (105), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 65 [2021-12-18 19:20:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:41,324 INFO L225 Difference]: With dead ends: 101 [2021-12-18 19:20:41,324 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 19:20:41,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=536, Invalid=6236, Unknown=42, NotChecked=326, Total=7140 [2021-12-18 19:20:41,326 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:41,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 568 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 132 Invalid, 0 Unknown, 302 Unchecked, 0.2s Time] [2021-12-18 19:20:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 19:20:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-12-18 19:20:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 84 states have internal predecessors, (91), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-12-18 19:20:41,328 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 65 [2021-12-18 19:20:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:41,329 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-12-18 19:20:41,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 48 states have internal predecessors, (105), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 19:20:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-12-18 19:20:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:20:41,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:41,329 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:41,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:41,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:41,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:20:41,730 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:20:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash -357187887, now seen corresponding path program 3 times [2021-12-18 19:20:41,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:20:41,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31161652] [2021-12-18 19:20:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:20:41,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:20:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:20:41,732 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:20:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 19:20:42,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:20:42,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:42,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-18 19:20:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:42,533 INFO L388 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 [2021-12-18 19:20:42,536 INFO L388 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 [2021-12-18 19:20:42,720 INFO L388 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 [2021-12-18 19:20:42,725 INFO L388 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 [2021-12-18 19:20:42,826 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:20:42,826 INFO L388 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 20 treesize of output 20 [2021-12-18 19:20:42,832 INFO L388 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 18 treesize of output 20 [2021-12-18 19:20:43,098 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:43,108 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,256 INFO L388 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 36 treesize of output 32 [2021-12-18 19:20:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-12-18 19:20:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,281 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-12-18 19:20:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-12-18 19:20:43,507 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:43,513 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:43,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,693 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-18 19:20:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 84 [2021-12-18 19:20:43,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,731 INFO L354 Elim1Store]: treesize reduction 98, result has 22.8 percent of original size [2021-12-18 19:20:43,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 54 [2021-12-18 19:20:43,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,777 INFO L354 Elim1Store]: treesize reduction 43, result has 48.8 percent of original size [2021-12-18 19:20:43,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 74 [2021-12-18 19:20:43,789 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:20:43,789 INFO L388 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 19 treesize of output 19 [2021-12-18 19:20:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-18 19:20:44,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:44,957 INFO L354 Elim1Store]: treesize reduction 43, result has 31.7 percent of original size [2021-12-18 19:20:44,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 102 [2021-12-18 19:20:44,972 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-12-18 19:20:44,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 26 [2021-12-18 19:20:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 19:20:45,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:47,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:47,310 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 152 [2021-12-18 19:20:47,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:47,320 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 131 [2021-12-18 19:20:47,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_42 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_186 (_ BitVec 32)) (v_arrayElimArr_43 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_186))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| v_~head~0.base_186 v_arrayElimArr_43)) (.cse2 (store |c_#memory_$Pointer$.base| v_~head~0.base_186 v_arrayElimArr_42)) (.cse6 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse3 (select (select .cse2 c_~head~0.base) .cse6)) (.cse4 (bvadd (select (select .cse5 c_~head~0.base) .cse6) (_ bv4 32)))) (let ((.cse0 (select (select .cse5 .cse3) .cse4))) (let ((.cse1 (bvadd .cse0 (_ bv4 32)))) (and (bvule .cse0 .cse1) (bvule .cse1 (select (store |c_#length| v_~head~0.base_186 (_ bv8 32)) (select (select .cse2 .cse3) .cse4)))))))) (not (= (select v_arrayElimArr_42 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_43 (_ bv4 32)) c_~head~0.offset)))) is different from false [2021-12-18 19:20:47,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:20:47,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31161652] [2021-12-18 19:20:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31161652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:47,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [990125] [2021-12-18 19:20:47,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:20:47,564 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:20:47,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:20:47,565 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:20:47,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-18 19:20:49,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:20:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:49,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-18 19:20:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:49,121 INFO L388 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 [2021-12-18 19:20:49,124 INFO L388 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 [2021-12-18 19:20:49,488 INFO L388 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 [2021-12-18 19:20:49,493 INFO L388 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 [2021-12-18 19:20:49,840 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 19:20:49,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2021-12-18 19:20:49,864 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:20:49,865 INFO L388 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 26 treesize of output 39 [2021-12-18 19:20:50,533 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:50,541 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:50,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:50,898 INFO L388 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 53 treesize of output 43 [2021-12-18 19:20:50,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:50,923 INFO L354 Elim1Store]: treesize reduction 45, result has 42.3 percent of original size [2021-12-18 19:20:50,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 64 [2021-12-18 19:20:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:50,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-12-18 19:20:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:50,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:51,328 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:51,335 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:20:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,450 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-12-18 19:20:51,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 88 [2021-12-18 19:20:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-12-18 19:20:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,493 INFO L354 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2021-12-18 19:20:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 41 [2021-12-18 19:20:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:51,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-12-18 19:20:54,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:54,198 INFO L354 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2021-12-18 19:20:54,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 235 treesize of output 123 [2021-12-18 19:20:54,221 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 19:20:54,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 36 [2021-12-18 19:20:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:55,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:00,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:00,249 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 216 [2021-12-18 19:21:00,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:00,262 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 213 [2021-12-18 19:21:02,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [990125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:02,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:02,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 44 [2021-12-18 19:21:02,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943388528] [2021-12-18 19:21:02,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:02,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 19:21:02,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 19:21:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3503, Unknown=31, NotChecked=120, Total=3906 [2021-12-18 19:21:02,327 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 41 states have internal predecessors, (95), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 19:21:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:06,583 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-12-18 19:21:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:21:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 41 states have internal predecessors, (95), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 65 [2021-12-18 19:21:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:06,584 INFO L225 Difference]: With dead ends: 106 [2021-12-18 19:21:06,584 INFO L226 Difference]: Without dead ends: 106 [2021-12-18 19:21:06,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 111 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=467, Invalid=5805, Unknown=52, NotChecked=156, Total=6480 [2021-12-18 19:21:06,585 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 53 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:06,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 657 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 402 Unchecked, 0.3s Time] [2021-12-18 19:21:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-18 19:21:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2021-12-18 19:21:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 84 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-12-18 19:21:06,587 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 65 [2021-12-18 19:21:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:06,588 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-12-18 19:21:06,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 41 states have internal predecessors, (95), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 19:21:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-12-18 19:21:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:21:06,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:06,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:06,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:06,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:06,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:06,996 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:21:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash 243815640, now seen corresponding path program 2 times [2021-12-18 19:21:06,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:06,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478391759] [2021-12-18 19:21:06,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:21:06,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:06,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:06,997 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:06,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 19:21:07,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:21:07,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:21:07,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-18 19:21:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:07,665 INFO L388 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 [2021-12-18 19:21:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 38 [2021-12-18 19:21:07,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2021-12-18 19:21:07,930 INFO L388 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 [2021-12-18 19:21:07,936 INFO L388 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 [2021-12-18 19:21:08,031 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:21:08,031 INFO L388 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 20 treesize of output 20 [2021-12-18 19:21:08,038 INFO L388 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 68 treesize of output 54 [2021-12-18 19:21:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-12-18 19:21:08,364 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:08,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 56 [2021-12-18 19:21:08,386 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:08,635 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 19:21:08,636 INFO L388 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 96 treesize of output 88 [2021-12-18 19:21:08,655 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 19:21:08,656 INFO L388 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 1 case distinctions, treesize of input 81 treesize of output 69 [2021-12-18 19:21:08,673 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 19:21:08,674 INFO L388 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 1 case distinctions, treesize of input 44 treesize of output 44 [2021-12-18 19:21:08,689 INFO L388 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 18 treesize of output 14 [2021-12-18 19:21:08,708 INFO L388 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 20 treesize of output 16 [2021-12-18 19:21:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:08,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-18 19:21:08,809 INFO L388 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 164 treesize of output 150 [2021-12-18 19:21:11,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:11,179 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 19:21:11,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 116 [2021-12-18 19:21:11,199 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-12-18 19:21:11,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 104 [2021-12-18 19:21:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:11,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:11,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:11,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:11,572 INFO L354 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2021-12-18 19:21:11,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 58 [2021-12-18 19:21:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:11,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:13,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:13,138 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 195 [2021-12-18 19:21:13,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:13,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 188 treesize of output 159 [2021-12-18 19:21:13,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:13,166 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2021-12-18 19:21:13,243 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_198 (_ BitVec 32)) (v_arrayElimArr_54 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_55 (Array (_ BitVec 32) (_ BitVec 8))) (v_arrayElimArr_56 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_55 (_ bv1 32)) (_ bv0 8))) (not (= (select v_arrayElimArr_54 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_55 (_ bv0 32)) (_ bv3 8))) (not (= (select v_arrayElimArr_56 (_ bv4 32)) c_~head~0.offset)) (not (= (select v_arrayElimArr_55 (_ bv2 32)) (_ bv0 8))) (not (= (select v_arrayElimArr_55 (_ bv3 32)) (_ bv0 8))) (not (= (_ bv2 32) (let ((.cse2 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse0 (select (store |c_#memory_int| v_~head~0.base_198 v_arrayElimArr_55) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_198 v_arrayElimArr_54) c_~head~0.base) .cse2))) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_198 v_arrayElimArr_56) c_~head~0.base) .cse2))) (concat (concat (concat (select .cse0 (bvadd .cse1 (_ bv3 32))) (select .cse0 (bvadd .cse1 (_ bv2 32)))) (select .cse0 (bvadd .cse1 (_ bv1 32)))) (select .cse0 .cse1)))))))) is different from false [2021-12-18 19:21:13,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478391759] [2021-12-18 19:21:13,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478391759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [117240687] [2021-12-18 19:21:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:21:13,246 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:21:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:21:13,247 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:21:13,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-18 19:21:14,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:21:14,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:21:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 19:21:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:14,118 INFO L388 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 [2021-12-18 19:21:14,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-12-18 19:21:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:14,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-12-18 19:21:14,831 INFO L388 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 [2021-12-18 19:21:14,837 INFO L388 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 [2021-12-18 19:21:15,104 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:21:15,104 INFO L388 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 26 treesize of output 39 [2021-12-18 19:21:15,114 INFO L388 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 59 treesize of output 37 [2021-12-18 19:21:15,727 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:15,732 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:16,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:16,024 INFO L388 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 100 treesize of output 72 [2021-12-18 19:21:16,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 41 [2021-12-18 19:21:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:16,040 INFO L354 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2021-12-18 19:21:16,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-12-18 19:21:16,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:16,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:21:17,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:17,079 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:21:17,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 70 [2021-12-18 19:21:17,088 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:21:17,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 19:21:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:17,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:17,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:17,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:17,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:17,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:17,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:17,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:17,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 34 [2021-12-18 19:21:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:17,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:17,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:17,856 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 135 [2021-12-18 19:21:17,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:17,861 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2021-12-18 19:21:17,918 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_204 (_ BitVec 32)) (v_ArrVal_4512 (Array (_ BitVec 32) (_ BitVec 8))) (v_arrayElimArr_60 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_59 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_60 (_ bv4 32)) c_~head~0.offset)) (not (= (_ bv2 32) (let ((.cse2 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse0 (select (store |c_#memory_int| v_~head~0.base_204 v_ArrVal_4512) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_204 v_arrayElimArr_59) c_~head~0.base) .cse2))) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_204 v_arrayElimArr_60) c_~head~0.base) .cse2))) (concat (concat (concat (select .cse0 (bvadd .cse1 (_ bv3 32))) (select .cse0 (bvadd .cse1 (_ bv2 32)))) (select .cse0 (bvadd .cse1 (_ bv1 32)))) (select .cse0 .cse1)))))) (not (= (select v_arrayElimArr_59 (_ bv4 32)) c_~head~0.base)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_204))))) is different from false [2021-12-18 19:21:17,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [117240687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:17,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:17,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2021-12-18 19:21:17,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468810132] [2021-12-18 19:21:17,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:17,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:21:17,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:17,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:21:17,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2669, Unknown=58, NotChecked=210, Total=3080 [2021-12-18 19:21:17,922 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 41 states have internal predecessors, (97), 5 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-18 19:21:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:21,040 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-12-18 19:21:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:21:21,041 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 41 states have internal predecessors, (97), 5 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2021-12-18 19:21:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:21,041 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:21:21,041 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 19:21:21,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 126 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=320, Invalid=5000, Unknown=90, NotChecked=290, Total=5700 [2021-12-18 19:21:21,043 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:21,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1158 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 390 Invalid, 0 Unknown, 507 Unchecked, 0.4s Time] [2021-12-18 19:21:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 19:21:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-12-18 19:21:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 84 states have internal predecessors, (89), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-12-18 19:21:21,045 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 66 [2021-12-18 19:21:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:21,046 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-12-18 19:21:21,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 41 states have internal predecessors, (97), 5 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-18 19:21:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-12-18 19:21:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 19:21:21,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:21,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:21,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:21,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:21,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:21:21,459 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:21:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1944601247, now seen corresponding path program 2 times [2021-12-18 19:21:21,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390931648] [2021-12-18 19:21:21,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:21:21,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:21,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:21,461 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:21,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-18 19:21:22,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:21:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:21:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-18 19:21:22,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:22,075 INFO L388 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 [2021-12-18 19:21:22,078 INFO L388 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 [2021-12-18 19:21:22,254 INFO L388 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 [2021-12-18 19:21:22,263 INFO L388 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 [2021-12-18 19:21:22,393 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:21:22,394 INFO L388 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 26 treesize of output 39 [2021-12-18 19:21:22,402 INFO L388 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 18 treesize of output 20 [2021-12-18 19:21:22,714 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:22,722 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:22,892 INFO L388 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 18 treesize of output 20 [2021-12-18 19:21:22,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:22,899 INFO L388 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 53 treesize of output 43 [2021-12-18 19:21:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:22,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-18 19:21:22,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:22,940 INFO L354 Elim1Store]: treesize reduction 45, result has 42.3 percent of original size [2021-12-18 19:21:22,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 65 [2021-12-18 19:21:23,287 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:23,295 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,500 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-12-18 19:21:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 81 [2021-12-18 19:21:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,524 INFO L354 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2021-12-18 19:21:23,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2021-12-18 19:21:23,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-12-18 19:21:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:23,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-12-18 19:21:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:25,110 INFO L354 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2021-12-18 19:21:25,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 101 [2021-12-18 19:21:25,131 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 19:21:25,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 29 [2021-12-18 19:21:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:25,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:27,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:27,071 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 154 [2021-12-18 19:21:27,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:27,079 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 133 [2021-12-18 19:21:27,314 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_210 (_ BitVec 32)) (v_arrayElimArr_65 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_66 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse5 (store |c_#memory_$Pointer$.offset| v_~head~0.base_210 v_arrayElimArr_66)) (.cse2 (store |c_#memory_$Pointer$.base| v_~head~0.base_210 v_arrayElimArr_65)) (.cse6 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse3 (select (select .cse2 c_~head~0.base) .cse6)) (.cse4 (bvadd (select (select .cse5 c_~head~0.base) .cse6) (_ bv4 32)))) (let ((.cse0 (select (select .cse5 .cse3) .cse4))) (let ((.cse1 (bvadd .cse0 (_ bv8 32)))) (and (bvule (bvadd .cse0 (_ bv4 32)) .cse1) (bvule .cse1 (select (store |c_#length| v_~head~0.base_210 (_ bv8 32)) (select (select .cse2 .cse3) .cse4)))))))) (not (= (select v_arrayElimArr_66 (_ bv4 32)) c_~head~0.offset)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_210))) (not (= (select v_arrayElimArr_65 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-18 19:21:27,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390931648] [2021-12-18 19:21:27,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390931648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1271421113] [2021-12-18 19:21:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:21:27,321 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:21:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:21:27,322 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:21:27,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-12-18 19:21:28,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:21:28,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:21:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-18 19:21:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:28,175 INFO L388 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 [2021-12-18 19:21:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-12-18 19:21:28,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:28,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-12-18 19:21:29,127 INFO L388 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 [2021-12-18 19:21:29,131 INFO L388 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 [2021-12-18 19:21:29,445 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 19:21:29,445 INFO L388 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 26 treesize of output 39 [2021-12-18 19:21:29,454 INFO L388 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 59 treesize of output 37 [2021-12-18 19:21:29,761 INFO L388 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 [2021-12-18 19:21:30,266 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:30,276 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:30,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:30,650 INFO L388 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 100 treesize of output 72 [2021-12-18 19:21:30,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:30,682 INFO L354 Elim1Store]: treesize reduction 45, result has 42.3 percent of original size [2021-12-18 19:21:30,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 65 [2021-12-18 19:21:30,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:30,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:21:30,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 41 [2021-12-18 19:21:31,597 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:31,604 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:32,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,026 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-12-18 19:21:32,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 110 [2021-12-18 19:21:32,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,058 INFO L354 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2021-12-18 19:21:32,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2021-12-18 19:21:32,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 45 [2021-12-18 19:21:32,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,084 INFO L388 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 18 treesize of output 20 [2021-12-18 19:21:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:32,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-12-18 19:21:35,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:35,115 INFO L354 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2021-12-18 19:21:35,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 316 treesize of output 158 [2021-12-18 19:21:35,140 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 19:21:35,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 43 [2021-12-18 19:21:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:35,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:35,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:35,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:35,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:35,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:35,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 34 [2021-12-18 19:21:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:43,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:43,041 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 564 treesize of output 513 [2021-12-18 19:21:43,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:43,054 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 537 treesize of output 474 [2021-12-18 19:21:44,958 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_72 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4886 (Array (_ BitVec 32) (_ BitVec 8))) (v_arrayElimArr_71 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_216 (_ BitVec 32))) (let ((.cse10 (store |c_#memory_$Pointer$.offset| v_~head~0.base_216 v_arrayElimArr_72)) (.cse11 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse8 (store |c_#memory_$Pointer$.base| v_~head~0.base_216 v_arrayElimArr_71)) (.cse0 (select (select .cse10 c_~head~0.base) .cse11))) (let ((.cse3 (bvadd .cse0 (_ bv4 32))) (.cse2 (store |c_#length| v_~head~0.base_216 (_ bv8 32))) (.cse9 (select (select .cse8 c_~head~0.base) .cse11))) (let ((.cse1 (select .cse2 .cse9)) (.cse4 (select (select .cse10 .cse9) .cse3)) (.cse6 (select (select .cse8 .cse9) .cse3))) (or (not (= (select v_arrayElimArr_71 (_ bv4 32)) c_~head~0.base)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_216))) (not (bvule (bvadd .cse0 (_ bv8 32)) .cse1)) (not (bvule (bvadd c_~head~0.offset (_ bv8 32)) (select .cse2 c_~head~0.base))) (not (bvule .cse0 .cse3)) (not (bvule .cse3 .cse1)) (not (= (select v_arrayElimArr_72 (_ bv4 32)) c_~head~0.offset)) (let ((.cse5 (bvadd .cse4 (_ bv8 32)))) (and (bvule (bvadd .cse4 (_ bv4 32)) .cse5) (bvule .cse5 (select .cse2 .cse6)))) (= (let ((.cse7 (select (store |c_#memory_int| v_~head~0.base_216 v_ArrVal_4886) .cse6))) (concat (concat (concat (select .cse7 (bvadd .cse4 (_ bv3 32))) (select .cse7 (bvadd .cse4 (_ bv2 32)))) (select .cse7 (bvadd .cse4 (_ bv1 32)))) (select .cse7 .cse4))) (_ bv2 32)))))))) is different from false [2021-12-18 19:21:44,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1271421113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:44,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:44,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 34] total 59 [2021-12-18 19:21:44,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597677193] [2021-12-18 19:21:44,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:44,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 19:21:44,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:44,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 19:21:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=5697, Unknown=54, NotChecked=306, Total=6320 [2021-12-18 19:21:44,967 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 52 states have internal predecessors, (118), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 19:21:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:53,173 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-12-18 19:21:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:21:53,173 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 52 states have internal predecessors, (118), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-12-18 19:21:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:53,174 INFO L225 Difference]: With dead ends: 145 [2021-12-18 19:21:53,174 INFO L226 Difference]: Without dead ends: 145 [2021-12-18 19:21:53,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=639, Invalid=11911, Unknown=114, NotChecked=446, Total=13110 [2021-12-18 19:21:53,175 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 977 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:53,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1241 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 452 Invalid, 0 Unknown, 977 Unchecked, 0.6s Time] [2021-12-18 19:21:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-18 19:21:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 130. [2021-12-18 19:21:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 119 states have internal predecessors, (126), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 19:21:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 141 transitions. [2021-12-18 19:21:53,178 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 141 transitions. Word has length 68 [2021-12-18 19:21:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:53,179 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 141 transitions. [2021-12-18 19:21:53,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 52 states have internal predecessors, (118), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 19:21:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 141 transitions. [2021-12-18 19:21:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 19:21:53,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:53,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:53,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:53,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-18 19:21:53,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:53,587 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:21:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1950426188, now seen corresponding path program 3 times [2021-12-18 19:21:53,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705758973] [2021-12-18 19:21:53,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:21:53,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:53,589 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:53,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-18 19:21:54,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:21:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:21:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-18 19:21:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:54,672 INFO L388 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 [2021-12-18 19:21:54,881 INFO L388 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 [2021-12-18 19:21:54,886 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:54,982 INFO L388 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 19 treesize of output 21 [2021-12-18 19:21:54,990 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:21:54,991 INFO L388 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 19 treesize of output 19 [2021-12-18 19:21:55,221 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:55,226 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:21:55,386 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-12-18 19:21:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 53 [2021-12-18 19:21:55,402 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-18 19:21:55,403 INFO L388 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 1 case distinctions, treesize of input 20 treesize of output 32 [2021-12-18 19:21:55,432 INFO L388 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 18 treesize of output 14 [2021-12-18 19:21:55,447 INFO L388 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 23 treesize of output 19 [2021-12-18 19:21:56,677 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-12-18 19:21:56,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-12-18 19:21:57,474 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-12-18 19:21:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 90 [2021-12-18 19:21:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:58,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:59,691 INFO L354 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2021-12-18 19:21:59,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 84 [2021-12-18 19:22:01,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:22:01,030 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 116 [2021-12-18 19:22:01,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:22:01,038 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 131 [2021-12-18 19:22:01,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705758973] [2021-12-18 19:22:01,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705758973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707050774] [2021-12-18 19:22:01,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:22:01,338 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:22:01,338 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:22:01,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-12-18 19:22:02,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:22:02,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:22:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-18 19:22:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:02,944 INFO L388 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 [2021-12-18 19:22:03,884 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:22:03,899 INFO L388 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 [2021-12-18 19:22:04,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:04,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:22:04,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:04,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-18 19:22:04,364 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 19:22:04,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:22:05,192 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:22:05,199 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 19:22:05,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:05,608 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-18 19:22:05,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 70 [2021-12-18 19:22:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:05,634 INFO L354 Elim1Store]: treesize reduction 43, result has 48.8 percent of original size [2021-12-18 19:22:05,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 70 [2021-12-18 19:22:05,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:05,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-18 19:22:05,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:05,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-12-18 19:22:08,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:22:08,253 INFO L354 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2021-12-18 19:22:08,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 117 [2021-12-18 19:22:08,268 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 19:22:08,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 42 [2021-12-18 19:22:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:10,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:14,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:22:14,741 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 185 [2021-12-18 19:22:14,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:22:14,755 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 188 [2021-12-18 19:22:15,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707050774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:15,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30] total 58 [2021-12-18 19:22:15,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135678531] [2021-12-18 19:22:15,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:22:15,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:22:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=6502, Unknown=47, NotChecked=0, Total=6972 [2021-12-18 19:22:15,682 INFO L87 Difference]: Start difference. First operand 130 states and 141 transitions. Second operand has 58 states, 58 states have (on average 1.896551724137931) internal successors, (110), 51 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 19:22:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:25,888 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-12-18 19:22:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:22:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.896551724137931) internal successors, (110), 51 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 68 [2021-12-18 19:22:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:25,889 INFO L225 Difference]: With dead ends: 136 [2021-12-18 19:22:25,889 INFO L226 Difference]: Without dead ends: 136 [2021-12-18 19:22:25,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=710, Invalid=9706, Unknown=90, NotChecked=0, Total=10506 [2021-12-18 19:22:25,891 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:25,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1036 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 307 Invalid, 0 Unknown, 562 Unchecked, 0.5s Time] [2021-12-18 19:22:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-18 19:22:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2021-12-18 19:22:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 119 states have internal predecessors, (124), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 19:22:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2021-12-18 19:22:25,894 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 68 [2021-12-18 19:22:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:25,894 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2021-12-18 19:22:25,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.896551724137931) internal successors, (110), 51 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 19:22:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2021-12-18 19:22:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:22:25,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:25,895 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:25,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:26,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-18 19:22:26,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:26,305 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-18 19:22:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash 242750108, now seen corresponding path program 3 times [2021-12-18 19:22:26,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54798121] [2021-12-18 19:22:26,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:22:26,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:26,306 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:26,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-18 19:22:27,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:22:27,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-18 19:22:27,171 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 19:22:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 19:22:27,690 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-18 19:22:27,690 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 19:22:27,691 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (20 of 21 remaining) [2021-12-18 19:22:27,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr0REQUIRES_VIOLATION (19 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr1REQUIRES_VIOLATION (18 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr2REQUIRES_VIOLATION (17 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr3REQUIRES_VIOLATION (16 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr4REQUIRES_VIOLATION (15 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr5REQUIRES_VIOLATION (14 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr6REQUIRES_VIOLATION (13 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr7REQUIRES_VIOLATION (12 of 21 remaining) [2021-12-18 19:22:27,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (11 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (10 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (9 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (8 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (7 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (6 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (5 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (4 of 21 remaining) [2021-12-18 19:22:27,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2021-12-18 19:22:27,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2021-12-18 19:22:27,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (1 of 21 remaining) [2021-12-18 19:22:27,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2021-12-18 19:22:27,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:27,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:27,910 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:27,912 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 19:22:27,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:22:27 BoogieIcfgContainer [2021-12-18 19:22:27,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 19:22:27,985 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 19:22:27,985 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 19:22:27,986 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 19:22:27,986 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:19:36" (3/4) ... [2021-12-18 19:22:27,987 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-18 19:22:28,035 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 19:22:28,037 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 19:22:28,037 INFO L158 Benchmark]: Toolchain (without parser) took 172362.50ms. Allocated memory was 50.3MB in the beginning and 195.0MB in the end (delta: 144.7MB). Free memory was 26.4MB in the beginning and 122.2MB in the end (delta: -95.9MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. [2021-12-18 19:22:28,037 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 50.3MB. Free memory is still 32.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:22:28,038 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.94ms. Allocated memory was 50.3MB in the beginning and 62.9MB in the end (delta: 12.6MB). Free memory was 26.2MB in the beginning and 35.0MB in the end (delta: -8.8MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. [2021-12-18 19:22:28,038 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.69ms. Allocated memory is still 62.9MB. Free memory was 34.8MB in the beginning and 32.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:22:28,038 INFO L158 Benchmark]: Boogie Preprocessor took 44.89ms. Allocated memory is still 62.9MB. Free memory was 32.9MB in the beginning and 31.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:22:28,038 INFO L158 Benchmark]: RCFGBuilder took 366.37ms. Allocated memory is still 62.9MB. Free memory was 31.2MB in the beginning and 34.0MB in the end (delta: -2.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 19:22:28,038 INFO L158 Benchmark]: TraceAbstraction took 171435.31ms. Allocated memory was 62.9MB in the beginning and 195.0MB in the end (delta: 132.1MB). Free memory was 33.5MB in the beginning and 127.5MB in the end (delta: -94.0MB). Peak memory consumption was 37.3MB. Max. memory is 16.1GB. [2021-12-18 19:22:28,038 INFO L158 Benchmark]: Witness Printer took 51.60ms. Allocated memory is still 195.0MB. Free memory was 127.5MB in the beginning and 122.2MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 19:22:28,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 50.3MB. Free memory is still 32.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.94ms. Allocated memory was 50.3MB in the beginning and 62.9MB in the end (delta: 12.6MB). Free memory was 26.2MB in the beginning and 35.0MB in the end (delta: -8.8MB). Peak memory consumption was 10.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.69ms. Allocated memory is still 62.9MB. Free memory was 34.8MB in the beginning and 32.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.89ms. Allocated memory is still 62.9MB. Free memory was 32.9MB in the beginning and 31.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 366.37ms. Allocated memory is still 62.9MB. Free memory was 31.2MB in the beginning and 34.0MB in the end (delta: -2.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 171435.31ms. Allocated memory was 62.9MB in the beginning and 195.0MB in the end (delta: 132.1MB). Free memory was 33.5MB in the beginning and 127.5MB in the end (delta: -94.0MB). Peak memory consumption was 37.3MB. Max. memory is 16.1GB. * Witness Printer took 51.60ms. Allocated memory is still 195.0MB. Free memory was 127.5MB in the beginning and 122.2MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L533] mlist *head; VAL [head={0:0}] [L554] int i; [L555] mlist *mylist, *temp; VAL [head={0:0}] [L556] CALL insert_list(mylist,2) VAL [\old(head)=null, \old(head)=null, \old(k)=2, head={0:0}, l={7:9}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=null, \old(head)=null, \old(k)=2, head={0:0}, k=2, l={7:9}, l={6:0}] [L544] COND TRUE head==((void *)0) VAL [\old(head)=null, \old(head)=null, \old(k)=2, head={0:0}, k=2, l={6:0}, l={7:9}] [L545] l->next = ((void *)0) VAL [\old(head)=null, \old(head)=null, \old(k)=2, head={0:0}, k=2, l={7:9}, l={6:0}] [L550] head = l [L551] return 0; VAL [\old(head)=null, \old(head)=null, \old(k)=2, \result=0, head={6:0}, k=2, l={7:9}, l={6:0}] [L556] RET insert_list(mylist,2) VAL [head={6:0}, insert_list(mylist,2)=0, mylist={7:9}] [L557] CALL insert_list(mylist,5) VAL [\old(head)=null, \old(head)=null, \old(k)=5, head={6:0}, l={7:9}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=null, \old(head)=null, \old(k)=5, head={6:0}, k=5, l={7:9}, l={-2147483647:0}] [L544] COND FALSE !(head==((void *)0)) VAL [\old(head)=null, \old(head)=null, \old(k)=5, head={6:0}, k=5, l={7:9}, l={-2147483647:0}] [L547] l->key = k VAL [\old(head)=null, \old(head)=null, \old(k)=5, head={6:0}, k=5, l={-2147483647:0}, l={7:9}] [L548] l->next = head VAL [\old(head)=null, \old(head)=null, \old(k)=5, head={6:0}, k=5, l={-2147483647:0}, l={7:9}] [L550] head = l [L551] return 0; VAL [\old(head)=null, \old(head)=null, \old(k)=5, \result=0, head={-2147483647:0}, k=5, l={-2147483647:0}, l={7:9}] [L557] RET insert_list(mylist,5) VAL [head={-2147483647:0}, insert_list(mylist,5)=0, mylist={7:9}] [L558] CALL insert_list(mylist,1) VAL [\old(head)=null, \old(head)=null, \old(k)=1, head={-2147483647:0}, l={7:9}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=null, \old(head)=null, \old(k)=1, head={-2147483647:0}, k=1, l={7:9}, l={5:0}] [L544] COND FALSE !(head==((void *)0)) VAL [\old(head)=null, \old(head)=null, \old(k)=1, head={-2147483647:0}, k=1, l={5:0}, l={7:9}] [L547] l->key = k VAL [\old(head)=null, \old(head)=null, \old(k)=1, head={-2147483647:0}, k=1, l={5:0}, l={7:9}] [L548] l->next = head VAL [\old(head)=null, \old(head)=null, \old(k)=1, head={-2147483647:0}, k=1, l={5:0}, l={7:9}] [L550] head = l [L551] return 0; VAL [\old(head)=null, \old(head)=null, \old(k)=1, \result=0, head={5:0}, k=1, l={7:9}, l={5:0}] [L558] RET insert_list(mylist,1) VAL [head={5:0}, insert_list(mylist,1)=0, mylist={7:9}] [L559] CALL insert_list(mylist,3) VAL [\old(head)=null, \old(head)=null, \old(k)=3, head={5:0}, l={7:9}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=null, \old(head)=null, \old(k)=3, head={5:0}, k=3, l={3:0}, l={7:9}] [L544] COND FALSE !(head==((void *)0)) VAL [\old(head)=null, \old(head)=null, \old(k)=3, head={5:0}, k=3, l={3:0}, l={7:9}] [L547] l->key = k VAL [\old(head)=null, \old(head)=null, \old(k)=3, head={5:0}, k=3, l={3:0}, l={7:9}] [L548] l->next = head VAL [\old(head)=null, \old(head)=null, \old(k)=3, head={5:0}, k=3, l={7:9}, l={3:0}] [L550] head = l [L551] return 0; VAL [\old(head)=null, \old(head)=null, \old(k)=3, \result=0, head={3:0}, k=3, l={3:0}, l={7:9}] [L559] RET insert_list(mylist,3) VAL [head={3:0}, insert_list(mylist,3)=0, mylist={7:9}] [L560] CALL, EXPR search_list(head,2) [L535] l = head VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={3:0}] [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={3:0}, l!=((void *)0) && l->key!=k=1] [L536] EXPR l->key VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={3:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={3:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={3:0}, l->next={5:0}] [L537] l = l->next [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={5:0}, l!=((void *)0) && l->key!=k=1] [L536] EXPR l->key VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={5:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={5:0}, l={3:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next VAL [\old(k)=2, head={3:0}, k=2, l={5:0}, l={3:0}, l->next={-2147483647:0}] [L537] l = l->next [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={-2147483647:0}, l={3:0}, l!=((void *)0) && l->key!=k=1] [L536] EXPR l->key VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={-2147483647:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={-2147483647:0}, l={3:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={-2147483647:0}, l->next={6:0}] [L537] l = l->next [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={6:0}, l!=((void *)0) && l->key!=k=1] [L536] EXPR l->key VAL [\old(k)=2, head={3:0}, k=2, l={3:0}, l={6:0}, l!=((void *)0) && l->key!=k=1, l->key=2] [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={3:0}, k=2, l={6:0}, l={3:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L536] COND FALSE !(l!=((void *)0) && l->key!=k) [L539] return l; VAL [\old(k)=2, \result={6:0}, head={3:0}, k=2, l={6:0}, l={3:0}] [L560] RET, EXPR search_list(head,2) [L560] temp = search_list(head,2) [L561] EXPR temp->key VAL [head={3:0}, mylist={7:9}, temp={6:0}, temp->key=2] [L561] CALL __VERIFIER_assert(temp->key==1) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, head={3:0}] [L15] reach_error() VAL [\old(cond)=0, cond=0, head={3:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 63 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 171.3s, OverallIterations: 25, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 40.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2581 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2581 mSDsluCounter, 10852 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4554 IncrementalHoareTripleChecker+Unchecked, 9807 mSDsCounter, 422 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5196 IncrementalHoareTripleChecker+Invalid, 10172 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 422 mSolverCounterUnsat, 1045 mSDtfsCounter, 5196 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2868 GetRequests, 1918 SyntacticMatches, 64 SemanticMatches, 886 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 14146 ImplicationChecksByTransitivity, 87.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=23, InterpolantAutomatonStates: 408, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 467 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 12.7s SatisfiabilityAnalysisTime, 104.8s InterpolantComputationTime, 1989 NumberOfCodeBlocks, 1989 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 2079 ConstructedInterpolants, 551 QuantifiedInterpolants, 65758 SizeOfPredicates, 520 NumberOfNonLiveVariables, 13090 ConjunctsInSsa, 1711 ConjunctsInUnsatCore, 39 InterpolantComputations, 9 PerfectInterpolantSequences, 1162/2015 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-18 19:22:28,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup)