./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/lis-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/array-memsafety/lis-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:58:30,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:58:30,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:58:30,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:58:30,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:58:30,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:58:30,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:58:30,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:58:30,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:58:30,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:58:30,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:58:30,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:58:30,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:58:30,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:58:30,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:58:30,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:58:30,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:58:30,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:58:30,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:58:30,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:58:30,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:58:30,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:58:30,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:58:30,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:58:30,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:58:30,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:58:30,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:58:30,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:58:30,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:58:30,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:58:30,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:58:30,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:58:30,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:58:30,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:58:30,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:58:30,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:58:30,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:58:30,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:58:30,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:58:30,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:58:30,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:58:30,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 23:58:30,892 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:58:30,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:58:30,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:58:30,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:58:30,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:58:30,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:58:30,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:58:30,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:58:30,897 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:58:30,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:58:30,898 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:58:30,898 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:58:30,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:58:30,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:58:30,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:58:30,898 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:58:30,899 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:58:30,899 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:58:30,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:58:30,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:58:30,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:58:30,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:58:30,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:58:30,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:58:30,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:58:30,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:58:30,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:58:30,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:58:30,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 23:58:30,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 23:58:30,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:58:30,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf [2021-12-21 23:58:31,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:58:31,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:58:31,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:58:31,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:58:31,110 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:58:31,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2021-12-21 23:58:31,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c129794/cf795fb93a0140f085b3fbea3a0243f9/FLAG35946bbd7 [2021-12-21 23:58:31,537 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:58:31,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2021-12-21 23:58:31,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c129794/cf795fb93a0140f085b3fbea3a0243f9/FLAG35946bbd7 [2021-12-21 23:58:31,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c129794/cf795fb93a0140f085b3fbea3a0243f9 [2021-12-21 23:58:31,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:58:31,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:58:31,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:58:31,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:58:31,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:58:31,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:58:31" (1/1) ... [2021-12-21 23:58:31,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9ca7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:31, skipping insertion in model container [2021-12-21 23:58:31,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:58:31" (1/1) ... [2021-12-21 23:58:31,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:58:31,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:58:31,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:58:31,789 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) [2021-12-21 23:58:31,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d4e1880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:31, skipping insertion in model container [2021-12-21 23:58:31,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:58:31,791 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 23:58:31,792 INFO L158 Benchmark]: Toolchain (without parser) took 234.18ms. Allocated memory is still 142.6MB. Free memory was 111.1MB in the beginning and 117.0MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 23:58:31,793 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 83.9MB. Free memory was 41.4MB in the beginning and 41.4MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 23:58:31,794 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.32ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 117.0MB in the end (delta: -6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 23:58:31,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 83.9MB. Free memory was 41.4MB in the beginning and 41.4MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.32ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 117.0MB in the end (delta: -6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 515]: 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/array-memsafety/lis-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:58:33,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:58:33,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:58:33,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:58:33,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:58:33,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:58:33,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:58:33,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:58:33,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:58:33,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:58:33,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:58:33,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:58:33,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:58:33,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:58:33,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:58:33,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:58:33,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:58:33,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:58:33,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:58:33,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:58:33,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:58:33,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:58:33,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:58:33,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:58:33,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:58:33,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:58:33,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:58:33,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:58:33,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:58:33,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:58:33,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:58:33,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:58:33,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:58:33,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:58:33,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:58:33,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:58:33,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:58:33,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:58:33,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:58:33,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:58:33,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:58:33,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 23:58:33,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:58:33,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:58:33,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:58:33,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:58:33,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:58:33,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:58:33,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:58:33,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:58:33,514 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:58:33,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:58:33,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:58:33,515 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:58:33,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:58:33,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:58:33,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:58:33,515 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:58:33,515 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:58:33,516 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:58:33,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:58:33,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:58:33,516 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 23:58:33,516 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 23:58:33,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:58:33,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:58:33,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:58:33,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:58:33,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:58:33,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:58:33,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:58:33,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:58:33,518 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 23:58:33,518 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 23:58:33,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:58:33,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 23:58:33,518 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf [2021-12-21 23:58:33,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:58:33,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:58:33,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:58:33,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:58:33,783 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:58:33,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2021-12-21 23:58:33,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ca83a64/11196cbccbc74b41b44aca9e59fe1dd5/FLAGe194c139a [2021-12-21 23:58:34,192 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:58:34,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2021-12-21 23:58:34,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ca83a64/11196cbccbc74b41b44aca9e59fe1dd5/FLAGe194c139a [2021-12-21 23:58:34,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ca83a64/11196cbccbc74b41b44aca9e59fe1dd5 [2021-12-21 23:58:34,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:58:34,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:58:34,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:58:34,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:58:34,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:58:34,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:34,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf4001e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34, skipping insertion in model container [2021-12-21 23:58:34,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:34,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:58:34,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:58:34,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:58:34,830 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 23:58:34,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:58:34,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:58:34,887 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 23:58:34,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:58:34,958 INFO L208 MainTranslator]: Completed translation [2021-12-21 23:58:34,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34 WrapperNode [2021-12-21 23:58:34,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:58:34,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 23:58:34,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 23:58:34,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 23:58:34,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:34,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:34,995 INFO L137 Inliner]: procedures = 117, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2021-12-21 23:58:34,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 23:58:34,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 23:58:34,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 23:58:34,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 23:58:35,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 23:58:35,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 23:58:35,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 23:58:35,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 23:58:35,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (1/1) ... [2021-12-21 23:58:35,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:58:35,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:58:35,052 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) [2021-12-21 23:58:35,094 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 [2021-12-21 23:58:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-21 23:58:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 23:58:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 23:58:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 23:58:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 23:58:35,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 23:58:35,180 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 23:58:35,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 23:58:35,602 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 23:58:35,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 23:58:35,606 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-21 23:58:35,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:58:35 BoogieIcfgContainer [2021-12-21 23:58:35,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 23:58:35,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 23:58:35,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 23:58:35,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 23:58:35,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:58:34" (1/3) ... [2021-12-21 23:58:35,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adb75c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:58:35, skipping insertion in model container [2021-12-21 23:58:35,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:58:34" (2/3) ... [2021-12-21 23:58:35,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adb75c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:58:35, skipping insertion in model container [2021-12-21 23:58:35,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:58:35" (3/3) ... [2021-12-21 23:58:35,613 INFO L111 eAbstractionObserver]: Analyzing ICFG lis-alloca-1.i [2021-12-21 23:58:35,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 23:58:35,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-12-21 23:58:35,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 23:58:35,645 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 [2021-12-21 23:58:35,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-12-21 23:58:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 41 states have (on average 1.951219512195122) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:58:35,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:35,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:58:35,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-21 23:58:35,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:35,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49245092] [2021-12-21 23:58:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:35,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:35,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:35,678 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) [2021-12-21 23:58:35,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 23:58:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:58:35,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:35,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 23:58:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:35,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:35,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49245092] [2021-12-21 23:58:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49245092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:35,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:35,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:58:35,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404819010] [2021-12-21 23:58:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:35,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:58:35,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:58:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:58:35,834 INFO L87 Difference]: Start difference. First operand has 67 states, 41 states have (on average 1.951219512195122) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:35,943 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-12-21 23:58:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:58:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:58:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:35,950 INFO L225 Difference]: With dead ends: 66 [2021-12-21 23:58:35,950 INFO L226 Difference]: Without dead ends: 64 [2021-12-21 23:58:35,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:58:35,956 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:35,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:58:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-21 23:58:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-21 23:58:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-12-21 23:58:35,984 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 6 [2021-12-21 23:58:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:35,985 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-12-21 23:58:35,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-12-21 23:58:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:58:35,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:35,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:58:35,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:36,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:36,195 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-21 23:58:36,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:36,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657996212] [2021-12-21 23:58:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:36,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:36,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:36,199 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) [2021-12-21 23:58:36,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 23:58:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:36,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 23:58:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:36,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 23:58:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:36,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:36,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657996212] [2021-12-21 23:58:36,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657996212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:36,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:36,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:58:36,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211064193] [2021-12-21 23:58:36,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:36,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:58:36,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:58:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:36,281 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:36,547 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2021-12-21 23:58:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:58:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:58:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:36,550 INFO L225 Difference]: With dead ends: 129 [2021-12-21 23:58:36,550 INFO L226 Difference]: Without dead ends: 129 [2021-12-21 23:58:36,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:36,551 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 73 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:36,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 275 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:58:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-21 23:58:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 67. [2021-12-21 23:58:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.744186046511628) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-12-21 23:58:36,563 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 6 [2021-12-21 23:58:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:36,563 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-12-21 23:58:36,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-12-21 23:58:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:58:36,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:36,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:58:36,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:36,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:36,771 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:36,772 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-21 23:58:36,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:36,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121398066] [2021-12-21 23:58:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:36,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:36,787 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) [2021-12-21 23:58:36,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 23:58:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:36,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:58:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:36,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:58:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:36,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:36,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:36,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121398066] [2021-12-21 23:58:36,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121398066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:36,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:36,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:58:36,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541746671] [2021-12-21 23:58:36,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:36,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:58:36,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:58:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:36,899 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:36,934 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-12-21 23:58:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:58:36,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:58:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:36,938 INFO L225 Difference]: With dead ends: 69 [2021-12-21 23:58:36,938 INFO L226 Difference]: Without dead ends: 69 [2021-12-21 23:58:36,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:36,940 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:36,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 174 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2021-12-21 23:58:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-21 23:58:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-12-21 23:58:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.75) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-12-21 23:58:36,949 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 6 [2021-12-21 23:58:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:36,949 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-12-21 23:58:36,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-12-21 23:58:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 23:58:36,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:36,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:36,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:37,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:37,157 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:37,159 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-12-21 23:58:37,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:37,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860635422] [2021-12-21 23:58:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:37,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:37,176 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) [2021-12-21 23:58:37,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 23:58:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:58:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:37,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:37,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:37,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860635422] [2021-12-21 23:58:37,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860635422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:37,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:37,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:58:37,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960909306] [2021-12-21 23:58:37,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:37,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:58:37,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:58:37,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:37,269 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:37,297 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-12-21 23:58:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:58:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 23:58:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:37,299 INFO L225 Difference]: With dead ends: 70 [2021-12-21 23:58:37,299 INFO L226 Difference]: Without dead ends: 70 [2021-12-21 23:58:37,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:37,301 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 71 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:37,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:58:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-21 23:58:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-21 23:58:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-12-21 23:58:37,316 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 8 [2021-12-21 23:58:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:37,316 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-12-21 23:58:37,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-12-21 23:58:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:58:37,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:37,317 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:37,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:37,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:37,524 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-21 23:58:37,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866924499] [2021-12-21 23:58:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:37,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:37,527 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) [2021-12-21 23:58:37,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 23:58:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:58:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:37,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:37,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:37,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866924499] [2021-12-21 23:58:37,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866924499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:37,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:37,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:58:37,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377186575] [2021-12-21 23:58:37,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:37,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:58:37,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:58:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:58:37,632 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:37,668 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-12-21 23:58:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:58:37,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 23:58:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:37,669 INFO L225 Difference]: With dead ends: 127 [2021-12-21 23:58:37,669 INFO L226 Difference]: Without dead ends: 127 [2021-12-21 23:58:37,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:58:37,670 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 317 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:37,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 255 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:58:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-21 23:58:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 72. [2021-12-21 23:58:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-12-21 23:58:37,673 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 10 [2021-12-21 23:58:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:37,673 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-12-21 23:58:37,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-12-21 23:58:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:58:37,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:37,674 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:37,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:37,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:37,880 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-21 23:58:37,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:37,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943678652] [2021-12-21 23:58:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:37,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:37,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:37,882 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) [2021-12-21 23:58:37,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 23:58:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 23:58:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:37,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:58:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:38,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:38,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:38,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943678652] [2021-12-21 23:58:38,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943678652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:38,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:38,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-21 23:58:38,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948244582] [2021-12-21 23:58:38,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:38,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:58:38,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:58:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:58:38,372 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:38,963 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2021-12-21 23:58:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 23:58:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 23:58:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:38,965 INFO L225 Difference]: With dead ends: 135 [2021-12-21 23:58:38,965 INFO L226 Difference]: Without dead ends: 135 [2021-12-21 23:58:38,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:58:38,965 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 324 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:38,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 267 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 5 Unchecked, 0.6s Time] [2021-12-21 23:58:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-21 23:58:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 80. [2021-12-21 23:58:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 79 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2021-12-21 23:58:38,968 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 10 [2021-12-21 23:58:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:38,968 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2021-12-21 23:58:38,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2021-12-21 23:58:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:58:38,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:38,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:38,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:39,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:39,176 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash -680998152, now seen corresponding path program 1 times [2021-12-21 23:58:39,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:39,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520027864] [2021-12-21 23:58:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:39,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:39,178 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) [2021-12-21 23:58:39,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 23:58:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:39,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:58:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:39,252 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 23:58:39,252 INFO L387 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 20 treesize of output 22 [2021-12-21 23:58:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:39,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:39,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:39,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520027864] [2021-12-21 23:58:39,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520027864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:39,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:39,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:58:39,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415441479] [2021-12-21 23:58:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:39,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:58:39,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:58:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:58:39,264 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:39,398 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-12-21 23:58:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:58:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:58:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:39,400 INFO L225 Difference]: With dead ends: 73 [2021-12-21 23:58:39,400 INFO L226 Difference]: Without dead ends: 73 [2021-12-21 23:58:39,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:58:39,403 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:39,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:58:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-21 23:58:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-21 23:58:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-12-21 23:58:39,410 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 12 [2021-12-21 23:58:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:39,410 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-12-21 23:58:39,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-12-21 23:58:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:58:39,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:39,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:39,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:39,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:39,623 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2021-12-21 23:58:39,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:39,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690018158] [2021-12-21 23:58:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:39,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:39,626 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) [2021-12-21 23:58:39,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 23:58:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 23:58:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:39,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:39,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 23:58:39,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:58:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:39,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:39,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:39,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690018158] [2021-12-21 23:58:39,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690018158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:39,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:39,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:58:39,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270267918] [2021-12-21 23:58:39,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:39,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:58:39,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:58:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:39,728 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:39,883 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2021-12-21 23:58:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:58:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:58:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:39,884 INFO L225 Difference]: With dead ends: 128 [2021-12-21 23:58:39,884 INFO L226 Difference]: Without dead ends: 128 [2021-12-21 23:58:39,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:39,884 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:39,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 139 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:58:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-21 23:58:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2021-12-21 23:58:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-12-21 23:58:39,886 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 12 [2021-12-21 23:58:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:39,887 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-12-21 23:58:39,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-12-21 23:58:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:58:39,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:39,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:39,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:40,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:40,088 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2021-12-21 23:58:40,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:40,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319142414] [2021-12-21 23:58:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:40,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:40,090 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) [2021-12-21 23:58:40,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 23:58:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:40,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:58:40,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:40,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2021-12-21 23:58:40,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:58:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:40,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:40,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319142414] [2021-12-21 23:58:40,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319142414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:40,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:40,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:58:40,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456280428] [2021-12-21 23:58:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:40,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:58:40,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:58:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:40,217 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:40,373 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2021-12-21 23:58:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:58:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:58:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:40,375 INFO L225 Difference]: With dead ends: 118 [2021-12-21 23:58:40,375 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 23:58:40,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:58:40,375 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 51 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:40,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 159 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-12-21 23:58:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 23:58:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 75. [2021-12-21 23:58:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2021-12-21 23:58:40,377 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 12 [2021-12-21 23:58:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:40,377 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2021-12-21 23:58:40,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2021-12-21 23:58:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:58:40,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:40,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:40,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:40,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:40,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash 363893777, now seen corresponding path program 1 times [2021-12-21 23:58:40,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:40,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645246579] [2021-12-21 23:58:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:40,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:40,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:40,588 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) [2021-12-21 23:58:40,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 23:58:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:58:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:40,663 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-21 23:58:40,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-21 23:58:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:40,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:40,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645246579] [2021-12-21 23:58:40,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645246579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:40,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:40,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:58:40,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098806998] [2021-12-21 23:58:40,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:40,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:58:40,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:40,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:58:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:58:40,678 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:40,751 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-21 23:58:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:58:40,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 23:58:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:40,752 INFO L225 Difference]: With dead ends: 73 [2021-12-21 23:58:40,752 INFO L226 Difference]: Without dead ends: 73 [2021-12-21 23:58:40,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:58:40,753 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:40,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 54 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:58:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-21 23:58:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-21 23:58:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2021-12-21 23:58:40,755 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 13 [2021-12-21 23:58:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:40,755 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2021-12-21 23:58:40,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2021-12-21 23:58:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:58:40,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:40,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:40,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:40,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:40,956 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 363893778, now seen corresponding path program 1 times [2021-12-21 23:58:40,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:40,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976558952] [2021-12-21 23:58:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:40,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:40,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:40,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 23:58:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:41,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 23:58:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:41,055 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 23:58:41,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 23:58:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:41,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:41,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:41,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976558952] [2021-12-21 23:58:41,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976558952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:41,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:41,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:58:41,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708844871] [2021-12-21 23:58:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:41,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:58:41,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:58:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:41,083 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:41,238 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2021-12-21 23:58:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:58:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 23:58:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:41,239 INFO L225 Difference]: With dead ends: 124 [2021-12-21 23:58:41,239 INFO L226 Difference]: Without dead ends: 124 [2021-12-21 23:58:41,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:41,240 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 59 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:41,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 133 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:58:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-21 23:58:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2021-12-21 23:58:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.435483870967742) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-12-21 23:58:41,241 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 13 [2021-12-21 23:58:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:41,241 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-12-21 23:58:41,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-12-21 23:58:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:58:41,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:41,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:41,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-21 23:58:41,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:41,442 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958356, now seen corresponding path program 1 times [2021-12-21 23:58:41,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:41,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620580562] [2021-12-21 23:58:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:41,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:41,444 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) [2021-12-21 23:58:41,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 23:58:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 23:58:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:41,545 INFO L353 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-21 23:58:41,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2021-12-21 23:58:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:41,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:41,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620580562] [2021-12-21 23:58:41,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620580562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:41,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:41,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:58:41,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000859612] [2021-12-21 23:58:41,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:41,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:58:41,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:58:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:41,628 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:41,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:41,833 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-12-21 23:58:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:58:41,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 23:58:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:41,834 INFO L225 Difference]: With dead ends: 117 [2021-12-21 23:58:41,834 INFO L226 Difference]: Without dead ends: 117 [2021-12-21 23:58:41,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:58:41,835 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 50 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:41,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 149 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-21 23:58:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-21 23:58:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-12-21 23:58:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-12-21 23:58:41,837 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 13 [2021-12-21 23:58:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-12-21 23:58:41,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-12-21 23:58:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 23:58:41,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:41,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:41,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:42,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:42,038 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1808065813, now seen corresponding path program 1 times [2021-12-21 23:58:42,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:42,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746044192] [2021-12-21 23:58:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:42,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:42,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:42,040 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) [2021-12-21 23:58:42,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 23:58:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:42,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 23:58:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:42,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:42,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:42,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746044192] [2021-12-21 23:58:42,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746044192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:42,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:58:42,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795450583] [2021-12-21 23:58:42,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:42,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:58:42,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:58:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:42,118 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:42,302 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2021-12-21 23:58:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:58:42,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 23:58:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:42,303 INFO L225 Difference]: With dead ends: 124 [2021-12-21 23:58:42,303 INFO L226 Difference]: Without dead ends: 124 [2021-12-21 23:58:42,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:42,304 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 58 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:42,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 208 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:58:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-21 23:58:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2021-12-21 23:58:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-12-21 23:58:42,305 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 15 [2021-12-21 23:58:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:42,306 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-12-21 23:58:42,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-12-21 23:58:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 23:58:42,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:42,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:42,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:42,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:42,507 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1221259799, now seen corresponding path program 1 times [2021-12-21 23:58:42,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:42,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657686850] [2021-12-21 23:58:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:42,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:42,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:42,514 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) [2021-12-21 23:58:42,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 23:58:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:58:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:42,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:42,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:42,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657686850] [2021-12-21 23:58:42,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657686850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:42,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:42,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-21 23:58:42,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660950855] [2021-12-21 23:58:42,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:42,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 23:58:42,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 23:58:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:58:42,754 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:43,064 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2021-12-21 23:58:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 23:58:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 23:58:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:43,066 INFO L225 Difference]: With dead ends: 126 [2021-12-21 23:58:43,066 INFO L226 Difference]: Without dead ends: 126 [2021-12-21 23:58:43,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-21 23:58:43,066 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 375 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:43,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 170 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:58:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-21 23:58:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2021-12-21 23:58:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.423728813559322) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-12-21 23:58:43,068 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 15 [2021-12-21 23:58:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:43,068 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-12-21 23:58:43,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-12-21 23:58:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 23:58:43,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:43,069 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:43,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:43,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:43,269 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash 262068158, now seen corresponding path program 1 times [2021-12-21 23:58:43,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:43,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847878264] [2021-12-21 23:58:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:43,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:43,271 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) [2021-12-21 23:58:43,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 23:58:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:58:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:43,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:43,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:43,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847878264] [2021-12-21 23:58:43,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847878264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:43,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:43,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:58:43,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342403017] [2021-12-21 23:58:43,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:43,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:58:43,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:58:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:58:43,485 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:43,620 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2021-12-21 23:58:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:58:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 23:58:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:43,622 INFO L225 Difference]: With dead ends: 96 [2021-12-21 23:58:43,622 INFO L226 Difference]: Without dead ends: 96 [2021-12-21 23:58:43,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:58:43,622 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 53 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:43,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 222 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:58:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-21 23:58:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-12-21 23:58:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 89 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2021-12-21 23:58:43,625 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 16 [2021-12-21 23:58:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:43,625 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2021-12-21 23:58:43,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2021-12-21 23:58:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 23:58:43,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:43,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:43,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:43,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:43,836 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash -749049092, now seen corresponding path program 1 times [2021-12-21 23:58:43,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:43,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824849106] [2021-12-21 23:58:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:43,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:43,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:43,838 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:43,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 23:58:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 23:58:43,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:44,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:44,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:44,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824849106] [2021-12-21 23:58:44,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824849106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:44,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:44,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-21 23:58:44,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980648023] [2021-12-21 23:58:44,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:44,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 23:58:44,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 23:58:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-21 23:58:44,119 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:44,451 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2021-12-21 23:58:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 23:58:44,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 23:58:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:44,452 INFO L225 Difference]: With dead ends: 112 [2021-12-21 23:58:44,452 INFO L226 Difference]: Without dead ends: 112 [2021-12-21 23:58:44,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-21 23:58:44,453 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 147 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:44,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 349 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:58:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-21 23:58:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2021-12-21 23:58:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 89 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2021-12-21 23:58:44,455 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 16 [2021-12-21 23:58:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:44,455 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2021-12-21 23:58:44,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2021-12-21 23:58:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 23:58:44,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:44,456 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-21 23:58:44,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:44,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:44,656 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-21 23:58:44,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:44,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609464046] [2021-12-21 23:58:44,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:58:44,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:44,658 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) [2021-12-21 23:58:44,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 23:58:44,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:58:44,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:44,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:58:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:44,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:58:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:45,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:45,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609464046] [2021-12-21 23:58:45,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609464046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:45,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:45,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 23:58:45,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802026869] [2021-12-21 23:58:45,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:45,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 23:58:45,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 23:58:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-21 23:58:45,755 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:47,803 INFO L93 Difference]: Finished difference Result 212 states and 238 transitions. [2021-12-21 23:58:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 23:58:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 23:58:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:47,805 INFO L225 Difference]: With dead ends: 212 [2021-12-21 23:58:47,806 INFO L226 Difference]: Without dead ends: 212 [2021-12-21 23:58:47,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-21 23:58:47,806 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 427 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:47,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 619 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 464 Invalid, 0 Unknown, 9 Unchecked, 1.2s Time] [2021-12-21 23:58:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-21 23:58:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 106. [2021-12-21 23:58:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 105 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-12-21 23:58:47,808 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 18 [2021-12-21 23:58:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-12-21 23:58:47,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-12-21 23:58:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 23:58:47,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:47,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:47,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-21 23:58:48,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:48,019 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash -302012765, now seen corresponding path program 1 times [2021-12-21 23:58:48,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:48,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787602095] [2021-12-21 23:58:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:48,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:48,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:48,020 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:48,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 23:58:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:48,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:58:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:48,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:48,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-21 23:58:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:48,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:48,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787602095] [2021-12-21 23:58:48,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787602095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:48,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:48,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-21 23:58:48,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269121902] [2021-12-21 23:58:48,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:48,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:58:48,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:58:48,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:58:48,414 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:49,144 INFO L93 Difference]: Finished difference Result 163 states and 187 transitions. [2021-12-21 23:58:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 23:58:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 23:58:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:49,145 INFO L225 Difference]: With dead ends: 163 [2021-12-21 23:58:49,145 INFO L226 Difference]: Without dead ends: 163 [2021-12-21 23:58:49,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:58:49,146 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 165 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:49,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 157 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 23:58:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-21 23:58:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 117. [2021-12-21 23:58:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 103 states have (on average 1.3689320388349515) internal successors, (141), 116 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-12-21 23:58:49,157 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 20 [2021-12-21 23:58:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:49,157 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-12-21 23:58:49,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-12-21 23:58:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 23:58:49,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:49,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:49,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:49,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:49,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:49,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646975, now seen corresponding path program 2 times [2021-12-21 23:58:49,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:49,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291542776] [2021-12-21 23:58:49,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:58:49,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:49,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:49,370 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) [2021-12-21 23:58:49,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 23:58:49,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:58:49,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 23:58:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:49,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:49,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2021-12-21 23:58:49,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:58:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:58:49,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:50,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:58:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:58:50,115 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:50,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291542776] [2021-12-21 23:58:50,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291542776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:50,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:50,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-21 23:58:50,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631239402] [2021-12-21 23:58:50,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:50,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:58:50,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:58:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:58:50,116 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:50,877 INFO L93 Difference]: Finished difference Result 161 states and 195 transitions. [2021-12-21 23:58:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 23:58:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 23:58:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:50,879 INFO L225 Difference]: With dead ends: 161 [2021-12-21 23:58:50,879 INFO L226 Difference]: Without dead ends: 161 [2021-12-21 23:58:50,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-21 23:58:50,879 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 114 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:50,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 247 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2021-12-21 23:58:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-21 23:58:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 133. [2021-12-21 23:58:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 132 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2021-12-21 23:58:50,882 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 20 [2021-12-21 23:58:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:50,882 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2021-12-21 23:58:50,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2021-12-21 23:58:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 23:58:50,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:50,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:50,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-21 23:58:51,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:51,083 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1786415948, now seen corresponding path program 1 times [2021-12-21 23:58:51,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:51,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837570234] [2021-12-21 23:58:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:51,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:51,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:51,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:51,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 23:58:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:51,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:58:51,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:51,275 INFO L353 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-21 23:58:51,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2021-12-21 23:58:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:58:51,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:58:51,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:51,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837570234] [2021-12-21 23:58:51,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837570234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:51,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:51,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-21 23:58:51,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574639285] [2021-12-21 23:58:51,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:51,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 23:58:51,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 23:58:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-21 23:58:51,997 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:53,062 INFO L93 Difference]: Finished difference Result 153 states and 186 transitions. [2021-12-21 23:58:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 23:58:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-21 23:58:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:53,063 INFO L225 Difference]: With dead ends: 153 [2021-12-21 23:58:53,063 INFO L226 Difference]: Without dead ends: 153 [2021-12-21 23:58:53,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-21 23:58:53,064 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 123 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:53,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 255 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 226 Invalid, 0 Unknown, 29 Unchecked, 0.8s Time] [2021-12-21 23:58:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-21 23:58:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 134. [2021-12-21 23:58:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 120 states have (on average 1.35) internal successors, (162), 133 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 162 transitions. [2021-12-21 23:58:53,066 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 162 transitions. Word has length 21 [2021-12-21 23:58:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:53,066 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 162 transitions. [2021-12-21 23:58:53,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 162 transitions. [2021-12-21 23:58:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 23:58:53,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:53,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:53,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-21 23:58:53,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:53,273 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1242696241, now seen corresponding path program 1 times [2021-12-21 23:58:53,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643300982] [2021-12-21 23:58:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:53,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:53,275 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) [2021-12-21 23:58:53,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-21 23:58:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:53,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 23:58:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:53,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:58:53,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-21 23:58:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:53,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:53,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643300982] [2021-12-21 23:58:53,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643300982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:53,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:53,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-21 23:58:53,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457458086] [2021-12-21 23:58:53,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:53,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 23:58:53,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 23:58:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-21 23:58:53,953 INFO L87 Difference]: Start difference. First operand 134 states and 162 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:54,767 INFO L93 Difference]: Finished difference Result 197 states and 237 transitions. [2021-12-21 23:58:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 23:58:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-21 23:58:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:54,768 INFO L225 Difference]: With dead ends: 197 [2021-12-21 23:58:54,768 INFO L226 Difference]: Without dead ends: 197 [2021-12-21 23:58:54,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-12-21 23:58:54,769 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 681 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:54,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 386 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 23:58:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-21 23:58:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2021-12-21 23:58:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 111 states have (on average 1.3513513513513513) internal successors, (150), 124 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2021-12-21 23:58:54,771 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 23 [2021-12-21 23:58:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:54,771 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2021-12-21 23:58:54,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2021-12-21 23:58:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 23:58:54,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:54,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:54,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:54,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:54,978 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1547664583, now seen corresponding path program 1 times [2021-12-21 23:58:54,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839468117] [2021-12-21 23:58:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:54,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:54,980 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) [2021-12-21 23:58:54,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-21 23:58:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:55,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 23:58:55,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:55,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:58:55,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:58:55,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:58:55,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 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 [2021-12-21 23:58:55,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-12-21 23:58:55,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:58:55,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 58 treesize of output 26 [2021-12-21 23:58:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:55,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:55,411 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_365 (Array (_ BitVec 32) (_ BitVec 8)))) (bvslt |c_ULTIMATE.start_lis_~max~0#1| (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_lis_~prev~0#1.base| v_ArrVal_365) |c_ULTIMATE.start_lis_~best~0#1.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_lis_~best~0#1.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_lis_~best~0#1.offset|))) (select .cse0 (bvadd |c_ULTIMATE.start_lis_~best~0#1.offset| (_ bv1 32)))) (select .cse0 |c_ULTIMATE.start_lis_~best~0#1.offset|))))) is different from false [2021-12-21 23:58:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:58:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:58:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:58:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:55,503 INFO L353 Elim1Store]: treesize reduction 303, result has 14.6 percent of original size [2021-12-21 23:58:55,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 95 [2021-12-21 23:58:55,616 INFO L353 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-12-21 23:58:55,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 98 [2021-12-21 23:58:55,626 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-21 23:58:55,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 13 [2021-12-21 23:58:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:55,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:55,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839468117] [2021-12-21 23:58:55,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839468117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:55,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:55,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-21 23:58:55,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242077827] [2021-12-21 23:58:55,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:55,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 23:58:55,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 23:58:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2021-12-21 23:58:55,997 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:57,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 23:58:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:57,465 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2021-12-21 23:58:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 23:58:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-21 23:58:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:57,468 INFO L225 Difference]: With dead ends: 167 [2021-12-21 23:58:57,468 INFO L226 Difference]: Without dead ends: 167 [2021-12-21 23:58:57,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=127, Unknown=1, NotChecked=24, Total=210 [2021-12-21 23:58:57,468 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:57,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 225 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 156 Invalid, 0 Unknown, 93 Unchecked, 1.4s Time] [2021-12-21 23:58:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-21 23:58:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2021-12-21 23:58:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 135 states have (on average 1.4148148148148147) internal successors, (191), 148 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2021-12-21 23:58:57,470 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 26 [2021-12-21 23:58:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:57,470 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 191 transitions. [2021-12-21 23:58:57,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 191 transitions. [2021-12-21 23:58:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 23:58:57,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:57,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:57,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-21 23:58:57,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:57,671 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:57,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1090844182, now seen corresponding path program 2 times [2021-12-21 23:58:57,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:57,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070908555] [2021-12-21 23:58:57,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:58:57,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:57,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:57,673 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:57,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-21 23:58:57,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 23:58:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 23:58:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:57,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 23:58:57,785 INFO L353 Elim1Store]: treesize reduction 43, result has 31.7 percent of original size [2021-12-21 23:58:57,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 31 [2021-12-21 23:58:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 23:58:57,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:57,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:57,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070908555] [2021-12-21 23:58:57,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070908555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:57,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:57,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:58:57,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906079631] [2021-12-21 23:58:57,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:57,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:58:57,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:58:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:58:57,899 INFO L87 Difference]: Start difference. First operand 149 states and 191 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:57,965 INFO L93 Difference]: Finished difference Result 157 states and 203 transitions. [2021-12-21 23:58:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:58:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 23:58:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:57,967 INFO L225 Difference]: With dead ends: 157 [2021-12-21 23:58:57,967 INFO L226 Difference]: Without dead ends: 157 [2021-12-21 23:58:57,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:57,967 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 10 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:57,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-21 23:58:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-21 23:58:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2021-12-21 23:58:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 139 states have (on average 1.4244604316546763) internal successors, (198), 152 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2021-12-21 23:58:57,969 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 27 [2021-12-21 23:58:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:57,969 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2021-12-21 23:58:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2021-12-21 23:58:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 23:58:57,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:57,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:57,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:58,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:58,176 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:58:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1090844181, now seen corresponding path program 1 times [2021-12-21 23:58:58,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366929014] [2021-12-21 23:58:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:58,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:58,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:58,177 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) [2021-12-21 23:58:58,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-21 23:58:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 23:58:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:58,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:58:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:58,447 INFO L353 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-12-21 23:58:58,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-21 23:58:58,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:58:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:58:59,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:59,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:58:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:58:59,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366929014] [2021-12-21 23:58:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366929014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:59,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:59,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-12-21 23:58:59,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806824192] [2021-12-21 23:58:59,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:59,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 23:58:59,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 23:58:59,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 23:58:59,893 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:00,318 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2021-12-21 23:59:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:59:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 23:59:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:00,320 INFO L225 Difference]: With dead ends: 160 [2021-12-21 23:59:00,320 INFO L226 Difference]: Without dead ends: 160 [2021-12-21 23:59:00,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-12-21 23:59:00,321 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 104 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:00,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 268 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 99 Unchecked, 0.3s Time] [2021-12-21 23:59:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-21 23:59:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-12-21 23:59:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 142 states have (on average 1.4295774647887325) internal successors, (203), 155 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 203 transitions. [2021-12-21 23:59:00,323 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 203 transitions. Word has length 27 [2021-12-21 23:59:00,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:00,324 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 203 transitions. [2021-12-21 23:59:00,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:00,324 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 203 transitions. [2021-12-21 23:59:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 23:59:00,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:00,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:00,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:00,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:00,525 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:00,525 INFO L85 PathProgramCache]: Analyzing trace with hash -397297604, now seen corresponding path program 1 times [2021-12-21 23:59:00,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:00,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241307800] [2021-12-21 23:59:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:59:00,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:00,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:00,527 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:59:00,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-21 23:59:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:59:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 23:59:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 23:59:06,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:59:06,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241307800] [2021-12-21 23:59:06,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241307800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:59:06,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:59:06,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 23:59:06,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385638759] [2021-12-21 23:59:06,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:59:06,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 23:59:06,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 23:59:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=27, Unknown=2, NotChecked=0, Total=42 [2021-12-21 23:59:06,543 INFO L87 Difference]: Start difference. First operand 156 states and 203 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:06,582 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2021-12-21 23:59:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 23:59:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 23:59:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:06,583 INFO L225 Difference]: With dead ends: 171 [2021-12-21 23:59:06,583 INFO L226 Difference]: Without dead ends: 146 [2021-12-21 23:59:06,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13, Invalid=27, Unknown=2, NotChecked=0, Total=42 [2021-12-21 23:59:06,584 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:06,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 201 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2021-12-21 23:59:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-21 23:59:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-12-21 23:59:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.4692307692307693) internal successors, (191), 143 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 191 transitions. [2021-12-21 23:59:06,586 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 191 transitions. Word has length 28 [2021-12-21 23:59:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:06,586 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 191 transitions. [2021-12-21 23:59:06,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 191 transitions. [2021-12-21 23:59:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 23:59:06,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:06,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:06,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:06,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:06,796 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 543568763, now seen corresponding path program 1 times [2021-12-21 23:59:06,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742462792] [2021-12-21 23:59:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:59:06,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:06,797 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) [2021-12-21 23:59:06,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-21 23:59:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:59:06,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 23:59:06,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 23:59:06,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:59:06,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:06,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742462792] [2021-12-21 23:59:06,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742462792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:59:06,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:59:06,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:59:06,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815770378] [2021-12-21 23:59:06,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:59:06,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:59:06,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:59:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:59:06,915 INFO L87 Difference]: Start difference. First operand 144 states and 191 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:07,008 INFO L93 Difference]: Finished difference Result 144 states and 183 transitions. [2021-12-21 23:59:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:59:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 23:59:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:07,010 INFO L225 Difference]: With dead ends: 144 [2021-12-21 23:59:07,010 INFO L226 Difference]: Without dead ends: 144 [2021-12-21 23:59:07,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:59:07,010 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 36 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:07,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 87 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:59:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-21 23:59:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-12-21 23:59:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.4031007751937985) internal successors, (181), 140 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2021-12-21 23:59:07,012 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 28 [2021-12-21 23:59:07,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:07,012 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2021-12-21 23:59:07,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2021-12-21 23:59:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 23:59:07,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:07,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:07,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-21 23:59:07,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:07,213 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash 543568764, now seen corresponding path program 1 times [2021-12-21 23:59:07,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:07,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425866553] [2021-12-21 23:59:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:59:07,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:07,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:07,215 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:59:07,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-21 23:59:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:59:07,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 23:59:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 23:59:07,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:59:07,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:07,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425866553] [2021-12-21 23:59:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425866553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:59:07,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:59:07,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 23:59:07,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408787276] [2021-12-21 23:59:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:59:07,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 23:59:07,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 23:59:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:59:07,454 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:07,718 INFO L93 Difference]: Finished difference Result 203 states and 259 transitions. [2021-12-21 23:59:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 23:59:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 23:59:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:07,719 INFO L225 Difference]: With dead ends: 203 [2021-12-21 23:59:07,719 INFO L226 Difference]: Without dead ends: 203 [2021-12-21 23:59:07,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:59:07,720 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 251 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:07,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 98 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:59:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-21 23:59:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 139. [2021-12-21 23:59:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.3858267716535433) internal successors, (176), 138 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2021-12-21 23:59:07,726 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 28 [2021-12-21 23:59:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:07,726 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2021-12-21 23:59:07,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2021-12-21 23:59:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 23:59:07,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:07,726 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:07,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:07,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:07,934 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:07,934 INFO L85 PathProgramCache]: Analyzing trace with hash 590171529, now seen corresponding path program 3 times [2021-12-21 23:59:07,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:07,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119316830] [2021-12-21 23:59:07,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:59:07,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:07,936 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) [2021-12-21 23:59:07,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-21 23:59:08,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 23:59:08,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:59:08,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 23:59:08,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:08,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:59:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:59:08,263 INFO L353 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-12-21 23:59:08,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 30 [2021-12-21 23:59:08,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:59:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:59:08,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:59:09,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:59:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:59:09,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119316830] [2021-12-21 23:59:09,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119316830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:59:09,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:59:09,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-12-21 23:59:09,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572959949] [2021-12-21 23:59:09,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:59:09,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 23:59:09,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 23:59:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-12-21 23:59:09,885 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:12,109 INFO L93 Difference]: Finished difference Result 240 states and 292 transitions. [2021-12-21 23:59:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 23:59:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 23:59:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:12,110 INFO L225 Difference]: With dead ends: 240 [2021-12-21 23:59:12,110 INFO L226 Difference]: Without dead ends: 240 [2021-12-21 23:59:12,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-12-21 23:59:12,111 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 275 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:12,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 335 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 361 Invalid, 0 Unknown, 146 Unchecked, 1.2s Time] [2021-12-21 23:59:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-21 23:59:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 215. [2021-12-21 23:59:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 203 states have (on average 1.3300492610837438) internal successors, (270), 214 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 270 transitions. [2021-12-21 23:59:12,114 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 270 transitions. Word has length 28 [2021-12-21 23:59:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:12,114 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 270 transitions. [2021-12-21 23:59:12,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 270 transitions. [2021-12-21 23:59:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 23:59:12,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:12,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:12,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:12,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:12,322 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1391261449, now seen corresponding path program 1 times [2021-12-21 23:59:12,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:12,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252035115] [2021-12-21 23:59:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:59:12,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:12,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:12,324 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:59:12,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-21 23:59:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:59:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 23:59:12,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 23:59:12,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:59:12,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252035115] [2021-12-21 23:59:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252035115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:59:12,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:59:12,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:59:12,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086603268] [2021-12-21 23:59:12,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:59:12,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:59:12,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:59:12,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:59:12,467 INFO L87 Difference]: Start difference. First operand 215 states and 270 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:12,488 INFO L93 Difference]: Finished difference Result 216 states and 268 transitions. [2021-12-21 23:59:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:59:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 23:59:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:12,489 INFO L225 Difference]: With dead ends: 216 [2021-12-21 23:59:12,494 INFO L226 Difference]: Without dead ends: 216 [2021-12-21 23:59:12,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:59:12,495 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 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 [2021-12-21 23:59:12,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:59:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-21 23:59:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-12-21 23:59:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 205 states have (on average 1.3073170731707318) internal successors, (268), 215 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-12-21 23:59:12,498 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 32 [2021-12-21 23:59:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:12,498 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-12-21 23:59:12,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-12-21 23:59:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 23:59:12,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:12,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:12,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:12,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:12,699 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1391252418, now seen corresponding path program 1 times [2021-12-21 23:59:12,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080938905] [2021-12-21 23:59:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:59:12,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:12,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:12,701 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) [2021-12-21 23:59:12,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-21 23:59:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:59:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 23:59:12,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:59:12,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:59:13,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-21 23:59:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:59:13,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:13,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080938905] [2021-12-21 23:59:13,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080938905] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:59:13,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:59:13,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-21 23:59:13,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666788499] [2021-12-21 23:59:13,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:59:13,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:59:13,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:59:13,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:59:13,309 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:14,355 INFO L93 Difference]: Finished difference Result 802 states and 1009 transitions. [2021-12-21 23:59:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 23:59:14,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 23:59:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:14,357 INFO L225 Difference]: With dead ends: 802 [2021-12-21 23:59:14,357 INFO L226 Difference]: Without dead ends: 802 [2021-12-21 23:59:14,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2021-12-21 23:59:14,358 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1220 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:14,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 199 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 23:59:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-21 23:59:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 311. [2021-12-21 23:59:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 301 states have (on average 1.3521594684385383) internal successors, (407), 310 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 407 transitions. [2021-12-21 23:59:14,366 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 407 transitions. Word has length 32 [2021-12-21 23:59:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:14,366 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 407 transitions. [2021-12-21 23:59:14,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 407 transitions. [2021-12-21 23:59:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 23:59:14,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:14,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:14,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:14,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:14,575 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:14,576 INFO L85 PathProgramCache]: Analyzing trace with hash 795842271, now seen corresponding path program 2 times [2021-12-21 23:59:14,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:14,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154217387] [2021-12-21 23:59:14,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:59:14,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:14,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:14,580 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:59:14,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-21 23:59:14,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 23:59:14,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:59:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 23:59:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:14,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 23:59:14,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-21 23:59:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 23:59:15,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:59:17,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:59:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 23:59:17,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154217387] [2021-12-21 23:59:17,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154217387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:59:17,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:59:17,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-12-21 23:59:17,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070773678] [2021-12-21 23:59:17,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:59:17,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 23:59:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 23:59:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:59:17,054 INFO L87 Difference]: Start difference. First operand 311 states and 407 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:17,267 INFO L93 Difference]: Finished difference Result 322 states and 423 transitions. [2021-12-21 23:59:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 23:59:17,268 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-21 23:59:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:17,270 INFO L225 Difference]: With dead ends: 322 [2021-12-21 23:59:17,270 INFO L226 Difference]: Without dead ends: 322 [2021-12-21 23:59:17,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-21 23:59:17,270 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:17,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 139 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2021-12-21 23:59:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-21 23:59:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 304. [2021-12-21 23:59:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 295 states have (on average 1.352542372881356) internal successors, (399), 303 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 399 transitions. [2021-12-21 23:59:17,297 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 399 transitions. Word has length 33 [2021-12-21 23:59:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:17,298 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 399 transitions. [2021-12-21 23:59:17,298 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 399 transitions. [2021-12-21 23:59:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:59:17,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:17,298 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-21 23:59:17,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:17,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:17,505 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:17,505 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-21 23:59:17,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969834125] [2021-12-21 23:59:17,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:59:17,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:17,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:17,507 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) [2021-12-21 23:59:17,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-21 23:59:17,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 23:59:17,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:59:17,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:59:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:17,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:59:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:59:18,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:59:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:59:20,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969834125] [2021-12-21 23:59:20,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969834125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:59:20,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:59:20,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-21 23:59:20,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552174183] [2021-12-21 23:59:20,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:59:20,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 23:59:20,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:20,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 23:59:20,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:59:20,970 INFO L87 Difference]: Start difference. First operand 304 states and 399 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:37,469 INFO L93 Difference]: Finished difference Result 1193 states and 1602 transitions. [2021-12-21 23:59:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 23:59:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 23:59:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:37,472 INFO L225 Difference]: With dead ends: 1193 [2021-12-21 23:59:37,472 INFO L226 Difference]: Without dead ends: 1193 [2021-12-21 23:59:37,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 23:59:37,473 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 2274 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:37,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2274 Valid, 1653 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1354 Invalid, 0 Unknown, 31 Unchecked, 5.1s Time] [2021-12-21 23:59:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-12-21 23:59:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 336. [2021-12-21 23:59:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 327 states have (on average 1.342507645259939) internal successors, (439), 335 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 439 transitions. [2021-12-21 23:59:37,479 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 439 transitions. Word has length 34 [2021-12-21 23:59:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:37,479 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 439 transitions. [2021-12-21 23:59:37,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 439 transitions. [2021-12-21 23:59:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:59:37,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:37,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:37,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:37,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:37,687 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1267793515, now seen corresponding path program 1 times [2021-12-21 23:59:37,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734125519] [2021-12-21 23:59:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:59:37,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:37,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:37,689 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:59:37,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-21 23:59:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:59:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:59:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 23:59:37,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:59:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 23:59:37,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:37,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734125519] [2021-12-21 23:59:37,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734125519] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:59:37,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:59:37,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:59:37,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504954433] [2021-12-21 23:59:37,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:59:37,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:59:37,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:59:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:59:37,915 INFO L87 Difference]: Start difference. First operand 336 states and 439 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:38,122 INFO L93 Difference]: Finished difference Result 320 states and 404 transitions. [2021-12-21 23:59:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 23:59:38,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 23:59:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:38,123 INFO L225 Difference]: With dead ends: 320 [2021-12-21 23:59:38,123 INFO L226 Difference]: Without dead ends: 320 [2021-12-21 23:59:38,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:59:38,124 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:38,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 125 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:59:38,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-21 23:59:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 309. [2021-12-21 23:59:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 300 states have (on average 1.31) internal successors, (393), 308 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 393 transitions. [2021-12-21 23:59:38,127 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 393 transitions. Word has length 34 [2021-12-21 23:59:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:38,127 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 393 transitions. [2021-12-21 23:59:38,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 393 transitions. [2021-12-21 23:59:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 23:59:38,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:38,128 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:38,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:38,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:38,328 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash 717604305, now seen corresponding path program 4 times [2021-12-21 23:59:38,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:38,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489475467] [2021-12-21 23:59:38,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:59:38,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:38,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:38,330 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) [2021-12-21 23:59:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-21 23:59:38,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:59:38,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:59:38,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 23:59:38,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:38,564 INFO L353 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-21 23:59:38,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2021-12-21 23:59:38,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-21 23:59:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:59:38,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:59:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:59:39,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:39,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489475467] [2021-12-21 23:59:39,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489475467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:59:39,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:59:39,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-12-21 23:59:39,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100226739] [2021-12-21 23:59:39,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:59:39,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 23:59:39,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 23:59:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-12-21 23:59:39,634 INFO L87 Difference]: Start difference. First operand 309 states and 393 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:59:45,182 INFO L93 Difference]: Finished difference Result 685 states and 891 transitions. [2021-12-21 23:59:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 23:59:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-21 23:59:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:59:45,185 INFO L225 Difference]: With dead ends: 685 [2021-12-21 23:59:45,185 INFO L226 Difference]: Without dead ends: 685 [2021-12-21 23:59:45,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=663, Invalid=2417, Unknown=0, NotChecked=0, Total=3080 [2021-12-21 23:59:45,186 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1113 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:59:45,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 930 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-21 23:59:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-12-21 23:59:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 500. [2021-12-21 23:59:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 491 states have (on average 1.3441955193482689) internal successors, (660), 499 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 660 transitions. [2021-12-21 23:59:45,191 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 660 transitions. Word has length 36 [2021-12-21 23:59:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:59:45,191 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 660 transitions. [2021-12-21 23:59:45,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:59:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 660 transitions. [2021-12-21 23:59:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 23:59:45,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:59:45,192 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:59:45,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-12-21 23:59:45,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:59:45,400 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 23:59:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:59:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash -411523054, now seen corresponding path program 5 times [2021-12-21 23:59:45,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:59:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331500552] [2021-12-21 23:59:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 23:59:45,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:59:45,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:59:45,402 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:59:45,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-21 23:59:45,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 23:59:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:59:45,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 23:59:45,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:59:45,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 23:59:45,997 INFO L353 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2021-12-21 23:59:45,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-12-21 23:59:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:59:46,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:59:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:59:48,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:59:48,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331500552] [2021-12-21 23:59:48,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331500552] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:59:48,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:59:48,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-12-21 23:59:48,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213258332] [2021-12-21 23:59:48,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:59:48,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 23:59:48,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:59:48,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 23:59:48,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-12-21 23:59:48,532 INFO L87 Difference]: Start difference. First operand 500 states and 660 transitions. Second operand has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)