./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:05:32,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:05:32,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:05:32,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:05:32,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:05:32,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:05:32,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:05:32,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:05:32,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:05:32,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:05:32,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:05:32,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:05:32,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:05:32,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:05:32,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:05:32,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:05:32,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:05:32,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:05:32,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:05:32,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:05:32,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:05:32,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:05:32,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:05:32,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:05:32,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:05:32,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:05:32,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:05:32,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:05:32,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:05:32,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:05:32,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:05:32,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:05:32,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:05:32,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:05:32,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:05:32,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:05:32,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:05:32,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:05:32,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:05:32,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:05:32,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:05:32,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 00:05:32,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:05:32,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:05:32,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:05:32,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:05:32,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:05:32,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:05:32,953 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:05:32,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:05:32,954 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:05:32,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:05:32,956 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:05:32,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:05:32,956 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:05:32,957 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:05:32,957 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:05:32,957 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:05:32,958 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:05:32,958 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:05:32,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:05:32,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:05:32,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:05:32,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:05:32,960 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:05:32,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:05:32,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:05:32,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:05:32,963 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:05:32,963 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:05:32,964 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:05:32,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:05:32,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:05:32,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:05:32,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:05:32,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:05:32,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:05:32,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:05:32,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:05:32,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:05:32,967 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:05:32,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:05:32,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:05:32,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:05:32,968 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a [2021-11-21 00:05:33,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:05:33,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:05:33,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:05:33,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:05:33,388 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:05:33,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2n_update_all.i [2021-11-21 00:05:33,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/data/d1cc41f38/d76cd2baef7543109e778d10b2b309af/FLAG6f9cd6c0b [2021-11-21 00:05:34,187 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:05:34,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/sv-benchmarks/c/list-simple/sll2n_update_all.i [2021-11-21 00:05:34,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/data/d1cc41f38/d76cd2baef7543109e778d10b2b309af/FLAG6f9cd6c0b [2021-11-21 00:05:34,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/data/d1cc41f38/d76cd2baef7543109e778d10b2b309af [2021-11-21 00:05:34,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:05:34,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:05:34,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:05:34,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:05:34,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:05:34,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:05:34" (1/1) ... [2021-11-21 00:05:34,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@afc0c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:34, skipping insertion in model container [2021-11-21 00:05:34,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:05:34" (1/1) ... [2021-11-21 00:05:34,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:05:34,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:05:34,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2021-11-21 00:05:34,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:05:34,998 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:05:35,075 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2021-11-21 00:05:35,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:05:35,114 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:05:35,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35 WrapperNode [2021-11-21 00:05:35,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:05:35,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:05:35,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:05:35,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:05:35,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,189 INFO L137 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2021-11-21 00:05:35,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:05:35,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:05:35,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:05:35,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:05:35,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:05:35,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:05:35,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:05:35,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:05:35,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (1/1) ... [2021-11-21 00:05:35,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:05:35,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:35,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:05:35,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:05:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:05:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:05:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:05:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:05:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:05:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:05:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:05:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:05:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:05:35,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:05:35,462 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:05:35,464 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:05:35,784 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:05:35,859 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:05:35,859 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 00:05:35,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:05:35 BoogieIcfgContainer [2021-11-21 00:05:35,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:05:35,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:05:35,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:05:35,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:05:35,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:05:34" (1/3) ... [2021-11-21 00:05:35,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dbe007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:05:35, skipping insertion in model container [2021-11-21 00:05:35,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:05:35" (2/3) ... [2021-11-21 00:05:35,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dbe007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:05:35, skipping insertion in model container [2021-11-21 00:05:35,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:05:35" (3/3) ... [2021-11-21 00:05:35,875 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2021-11-21 00:05:35,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:05:35,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-21 00:05:35,956 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:05:35,966 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 [2021-11-21 00:05:35,967 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-21 00:05:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 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) [2021-11-21 00:05:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:05:35,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:35,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:05:35,998 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:05:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:36,006 INFO L85 PathProgramCache]: Analyzing trace with hash 5402296, now seen corresponding path program 1 times [2021-11-21 00:05:36,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:36,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318884848] [2021-11-21 00:05:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:36,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:36,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:36,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318884848] [2021-11-21 00:05:36,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318884848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:36,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:36,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:05:36,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713653320] [2021-11-21 00:05:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:36,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:05:36,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:05:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:05:36,277 INFO L87 Difference]: Start difference. First operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 00:05:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:36,413 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-21 00:05:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:05:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-21 00:05:36,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:36,427 INFO L225 Difference]: With dead ends: 76 [2021-11-21 00:05:36,428 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 00:05:36,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:05:36,434 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:36,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:05:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 00:05:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2021-11-21 00:05:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 2.090909090909091) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-11-21 00:05:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-21 00:05:36,480 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 4 [2021-11-21 00:05:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:36,481 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-21 00:05:36,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 00:05:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-21 00:05:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:05:36,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:36,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:05:36,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:05:36,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:05:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 5402297, now seen corresponding path program 1 times [2021-11-21 00:05:36,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:36,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094509579] [2021-11-21 00:05:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:36,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:36,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094509579] [2021-11-21 00:05:36,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094509579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:36,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:36,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:05:36,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442881298] [2021-11-21 00:05:36,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:05:36,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:05:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:05:36,553 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 00:05:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:36,722 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-21 00:05:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:05:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-21 00:05:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:36,725 INFO L225 Difference]: With dead ends: 71 [2021-11-21 00:05:36,725 INFO L226 Difference]: Without dead ends: 71 [2021-11-21 00:05:36,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:05:36,755 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:36,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:05:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-21 00:05:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2021-11-21 00:05:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 2.0) internal successors, (44), 38 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) [2021-11-21 00:05:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-21 00:05:36,766 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 4 [2021-11-21 00:05:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:36,766 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-21 00:05:36,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 00:05:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-21 00:05:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:05:36,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:36,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:05:36,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:05:36,769 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:05:36,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 172148575, now seen corresponding path program 1 times [2021-11-21 00:05:36,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:36,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004841907] [2021-11-21 00:05:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:36,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:36,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:36,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004841907] [2021-11-21 00:05:36,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004841907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:36,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:36,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:05:36,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449382301] [2021-11-21 00:05:36,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:36,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:05:36,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:05:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:05:36,809 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-21 00:05:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:36,862 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-21 00:05:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:05:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-21 00:05:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:36,864 INFO L225 Difference]: With dead ends: 46 [2021-11-21 00:05:36,864 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 00:05:36,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:05:36,867 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:36,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:05:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 00:05:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-21 00:05:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-11-21 00:05:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-21 00:05:36,876 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 5 [2021-11-21 00:05:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:36,877 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-21 00:05:36,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-21 00:05:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-21 00:05:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:05:36,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:36,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:05:36,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:05:36,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:05:36,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash 896643063, now seen corresponding path program 1 times [2021-11-21 00:05:36,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:36,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515860497] [2021-11-21 00:05:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:36,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:36,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515860497] [2021-11-21 00:05:36,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515860497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:36,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:36,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:05:36,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503093278] [2021-11-21 00:05:36,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:36,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:05:36,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:05:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:36,949 INFO L87 Difference]: Start difference. First operand 40 states and 45 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) [2021-11-21 00:05:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:37,057 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-11-21 00:05:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:05:37,059 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 [2021-11-21 00:05:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:37,060 INFO L225 Difference]: With dead ends: 54 [2021-11-21 00:05:37,062 INFO L226 Difference]: Without dead ends: 54 [2021-11-21 00:05:37,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:05:37,065 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:37,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:05:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-21 00:05:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-11-21 00:05:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 38 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) [2021-11-21 00:05:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-21 00:05:37,085 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 6 [2021-11-21 00:05:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:37,086 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-21 00:05:37,086 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) [2021-11-21 00:05:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-21 00:05:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:05:37,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:37,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:05:37,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:05:37,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:05:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash 896643064, now seen corresponding path program 1 times [2021-11-21 00:05:37,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:37,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890015087] [2021-11-21 00:05:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:37,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:37,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:37,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890015087] [2021-11-21 00:05:37,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890015087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:37,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:05:37,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:05:37,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158735449] [2021-11-21 00:05:37,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:37,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:05:37,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:05:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:05:37,180 INFO L87 Difference]: Start difference. First operand 39 states and 44 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) [2021-11-21 00:05:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:37,252 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-21 00:05:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:05:37,253 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 [2021-11-21 00:05:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:37,254 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:05:37,254 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 00:05:37,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:05:37,257 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:37,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:05:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 00:05:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-21 00:05:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 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) [2021-11-21 00:05:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-21 00:05:37,264 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2021-11-21 00:05:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:37,265 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-21 00:05:37,266 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) [2021-11-21 00:05:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-21 00:05:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:05:37,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:37,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:37,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:05:37,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:05:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash -877899620, now seen corresponding path program 1 times [2021-11-21 00:05:37,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009376326] [2021-11-21 00:05:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:37,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:37,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009376326] [2021-11-21 00:05:37,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009376326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:37,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069199834] [2021-11-21 00:05:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:37,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:37,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:37,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:05:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:05:37,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:37,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:37,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069199834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:05:37,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490006937] [2021-11-21 00:05:37,607 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:05:37,607 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:37,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:05:37,620 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:05:37,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:05:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:37,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:05:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:05:38,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:05:38,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:05:38,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:05:38,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:05:38,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:05:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:38,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:05:38,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:38,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:05:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:38,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:05:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:39,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:05:39,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:39,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:39,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:05:39,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:05:39,945 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:39,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:05:40,017 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:05:41,320 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:05:41,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:05:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:41,425 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:41,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:05:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:41,529 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:41,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:05:43,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:43,286 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:05:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:05:43,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:43,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:43,323 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:05:43,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 257 treesize of output 242 [2021-11-21 00:05:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:43,364 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:05:43,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:05:44,030 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:05:44,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:05:44,938 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:44,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:05:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:44,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:44,966 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:05:44,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:05:45,032 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:45,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:05:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:46,204 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:46,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 336 treesize of output 337 [2021-11-21 00:05:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:46,266 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:05:46,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 327 [2021-11-21 00:05:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:46,335 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:46,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:05:47,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:47,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:47,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:47,928 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:05:47,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:05:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:47,968 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:05:47,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:05:47,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:48,003 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:05:48,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:05:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:05:48,844 INFO L388 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 6 treesize of output 5 [2021-11-21 00:05:48,866 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:05:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [490006937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:50,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:05:50,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2021-11-21 00:05:50,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606515262] [2021-11-21 00:05:50,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:50,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:05:50,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:50,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:05:50,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:05:50,605 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-11-21 00:05:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:50,910 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-21 00:05:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:05:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 [2021-11-21 00:05:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:50,911 INFO L225 Difference]: With dead ends: 43 [2021-11-21 00:05:50,911 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 00:05:50,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:05:50,913 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:50,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 67 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:05:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 00:05:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-11-21 00:05:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.8) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-11-21 00:05:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-21 00:05:50,919 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 10 [2021-11-21 00:05:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:50,919 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-21 00:05:50,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-11-21 00:05:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-21 00:05:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:05:50,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:50,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:50,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:51,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:05:51,122 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:05:51,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -877896048, now seen corresponding path program 1 times [2021-11-21 00:05:51,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:51,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682625744] [2021-11-21 00:05:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:51,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:51,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682625744] [2021-11-21 00:05:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682625744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616631101] [2021-11-21 00:05:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:51,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:51,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:51,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:05:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:51,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:05:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:51,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:51,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616631101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:05:51,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194407761] [2021-11-21 00:05:51,360 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:05:51,360 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:51,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:05:51,361 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:05:51,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:05:51,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:51,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:51,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:05:51,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:51,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:05:51,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:05:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:05:52,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:05:52,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:05:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:05:52,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:05:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:05:52,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:52,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:05:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:05:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:53,085 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:05:53,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:05:53,154 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:53,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:05:53,206 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:53,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:05:54,490 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:05:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:05:54,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:54,548 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:54,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:05:54,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:54,603 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:54,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:05:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:56,036 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:05:56,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:05:56,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:56,092 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:05:56,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:05:56,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:56,129 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:05:56,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:05:56,817 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:05:56,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:05:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:57,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:57,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:05:57,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:05:57,736 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:57,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:05:57,787 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:05:57,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:05:58,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:05:58,843 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:05:58,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:05:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:58,891 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:58,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:05:58,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:58,944 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:05:58,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:06:00,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:00,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:00,476 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:06:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:06:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:00,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:00,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:00,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:00,499 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 00:06:00,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-21 00:06:00,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:00,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:00,531 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-21 00:06:00,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:06:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:06:01,641 INFO L388 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 6 treesize of output 5 [2021-11-21 00:06:01,682 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:03,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:06:03,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:06:03,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-21 00:06:03,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838909743] [2021-11-21 00:06:03,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:06:03,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:06:03,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:06:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:06:03,550 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-21 00:06:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:03,594 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-21 00:06:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:06:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 [2021-11-21 00:06:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:03,598 INFO L225 Difference]: With dead ends: 45 [2021-11-21 00:06:03,598 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 00:06:03,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:06:03,600 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:03,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:06:03,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 00:06:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-21 00:06:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 44 states have internal predecessors, (50), 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) [2021-11-21 00:06:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-21 00:06:03,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 10 [2021-11-21 00:06:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:03,606 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-21 00:06:03,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-21 00:06:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-21 00:06:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:06:03,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:03,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:06:03,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:06:03,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:03,832 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:06:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636301, now seen corresponding path program 2 times [2021-11-21 00:06:03,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:03,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608487625] [2021-11-21 00:06:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:03,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:06:03,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:03,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608487625] [2021-11-21 00:06:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608487625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:03,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:06:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:06:03,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553011532] [2021-11-21 00:06:03,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:03,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:06:03,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:06:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:06:03,928 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2021-11-21 00:06:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:04,070 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-11-21 00:06:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:06:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 15 [2021-11-21 00:06:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:04,071 INFO L225 Difference]: With dead ends: 62 [2021-11-21 00:06:04,071 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 00:06:04,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:06:04,072 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:04,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 44 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:06:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 00:06:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-11-21 00:06:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 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) [2021-11-21 00:06:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-21 00:06:04,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 15 [2021-11-21 00:06:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:04,079 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-21 00:06:04,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2021-11-21 00:06:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-21 00:06:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:06:04,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:04,080 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:06:04,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:06:04,081 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:06:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636300, now seen corresponding path program 1 times [2021-11-21 00:06:04,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:04,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145744716] [2021-11-21 00:06:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:04,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:06:04,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145744716] [2021-11-21 00:06:04,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145744716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:04,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:06:04,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:06:04,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157782372] [2021-11-21 00:06:04,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:04,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:06:04,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:06:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:06:04,221 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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) [2021-11-21 00:06:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:04,397 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-11-21 00:06:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:06:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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 [2021-11-21 00:06:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:04,399 INFO L225 Difference]: With dead ends: 72 [2021-11-21 00:06:04,399 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 00:06:04,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:06:04,401 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 294 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:04,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:06:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 00:06:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2021-11-21 00:06:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 47 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) [2021-11-21 00:06:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-21 00:06:04,408 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 15 [2021-11-21 00:06:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:04,408 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-21 00:06:04,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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) [2021-11-21 00:06:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-21 00:06:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:06:04,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:04,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:04,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:06:04,410 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:06:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066666, now seen corresponding path program 1 times [2021-11-21 00:06:04,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:04,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465406818] [2021-11-21 00:06:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:04,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:04,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:04,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465406818] [2021-11-21 00:06:04,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465406818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:04,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:06:04,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:06:04,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166272449] [2021-11-21 00:06:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:04,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:06:04,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:06:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:06:04,496 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-21 00:06:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:04,658 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-21 00:06:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:06:04,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 19 [2021-11-21 00:06:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:04,661 INFO L225 Difference]: With dead ends: 133 [2021-11-21 00:06:04,662 INFO L226 Difference]: Without dead ends: 133 [2021-11-21 00:06:04,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:06:04,665 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 151 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:04,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 60 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:06:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-21 00:06:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 51. [2021-11-21 00:06:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 50 states have internal predecessors, (60), 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) [2021-11-21 00:06:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-11-21 00:06:04,688 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 19 [2021-11-21 00:06:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:04,689 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-11-21 00:06:04,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-21 00:06:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-11-21 00:06:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:06:04,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:04,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:04,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:06:04,691 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:06:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066665, now seen corresponding path program 1 times [2021-11-21 00:06:04,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:04,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924058041] [2021-11-21 00:06:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:04,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:04,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:04,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924058041] [2021-11-21 00:06:04,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924058041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:04,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535537493] [2021-11-21 00:06:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:04,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:04,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:06:04,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:06:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:04,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:06:04,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:06:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:05,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:06:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:05,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535537493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:06:05,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810384970] [2021-11-21 00:06:05,090 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 00:06:05,090 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:06:05,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:06:05,091 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:06:05,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:06:05,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:05,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:05,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:06:05,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:06:05,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:06:05,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:05,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:06:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:05,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:06:05,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:05,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:06:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:05,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:06:05,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:05,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:06:05,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:05,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:06:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:06:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:06:06,556 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:06,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:06:06,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,623 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 00:06:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 309 [2021-11-21 00:06:06,668 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:06,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 318 [2021-11-21 00:06:07,898 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 00:06:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 263 [2021-11-21 00:06:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:07,948 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:07,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 265 treesize of output 266 [2021-11-21 00:06:07,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:07,991 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:07,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 263 treesize of output 264 [2021-11-21 00:06:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:09,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:09,214 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:06:09,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:06:09,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:09,251 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:09,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:06:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:09,292 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:09,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:06:09,928 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:06:09,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:06:10,615 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:10,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:06:10,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:10,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:10,663 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 00:06:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 309 [2021-11-21 00:06:10,717 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:10,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 318 [2021-11-21 00:06:12,089 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 00:06:12,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 333 [2021-11-21 00:06:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:12,131 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:12,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 344 [2021-11-21 00:06:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:12,175 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 341 treesize of output 342 [2021-11-21 00:06:13,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:13,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:13,642 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:06:13,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:06:13,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:13,685 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:06:13,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:13,731 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:06:13,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:06:14,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:14,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:15,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:16,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 00:06:16,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:06:16,307 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:18,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [810384970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:18,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:06:18,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4, 4] total 17 [2021-11-21 00:06:18,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566405858] [2021-11-21 00:06:18,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:18,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:06:18,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:18,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:06:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:06:18,544 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 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) [2021-11-21 00:06:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:18,805 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-11-21 00:06:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:06:18,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 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 19 [2021-11-21 00:06:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:18,806 INFO L225 Difference]: With dead ends: 55 [2021-11-21 00:06:18,806 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 00:06:18,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:06:18,807 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:18,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 37 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:06:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 00:06:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-11-21 00:06:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.641025641025641) internal successors, (64), 53 states have internal predecessors, (64), 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) [2021-11-21 00:06:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-11-21 00:06:18,813 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 19 [2021-11-21 00:06:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:18,813 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-11-21 00:06:18,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 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) [2021-11-21 00:06:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-11-21 00:06:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:06:18,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:18,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:18,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:06:19,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:19,029 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:06:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1407041625, now seen corresponding path program 1 times [2021-11-21 00:06:19,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:19,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712025332] [2021-11-21 00:06:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:19,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:19,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:19,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712025332] [2021-11-21 00:06:19,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712025332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:19,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613365728] [2021-11-21 00:06:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:19,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:19,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:19,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:06:19,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:06:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:19,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:06:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:06:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:19,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:06:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:19,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613365728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:06:19,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846295515] [2021-11-21 00:06:19,324 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:06:19,324 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:06:19,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:06:19,325 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:06:19,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:06:19,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:19,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:06:19,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:06:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:19,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:06:19,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:06:19,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:19,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:06:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:06:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:19,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:06:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:06:20,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:20,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:06:20,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:20,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:06:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:06:20,614 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:20,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:06:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:20,657 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 00:06:20,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 309 [2021-11-21 00:06:20,696 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:20,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 318 [2021-11-21 00:06:22,293 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 00:06:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 333 [2021-11-21 00:06:22,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:22,340 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 344 [2021-11-21 00:06:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:22,382 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:22,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 341 treesize of output 342 [2021-11-21 00:06:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:23,757 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:06:23,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:06:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:23,793 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:23,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:06:23,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:23,823 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:23,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:06:24,321 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:06:24,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:06:24,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:24,948 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 00:06:24,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 310 treesize of output 302 [2021-11-21 00:06:24,986 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:24,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 311 [2021-11-21 00:06:25,023 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:25,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 318 [2021-11-21 00:06:26,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:26,457 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:26,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:06:26,555 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 00:06:26,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 256 treesize of output 261 [2021-11-21 00:06:26,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:26,618 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:26,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 263 treesize of output 264 [2021-11-21 00:06:27,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:27,718 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:27,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:06:27,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:27,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:27,750 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 00:06:27,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-21 00:06:27,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:27,783 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:06:27,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:06:28,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:28,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:29,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:29,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:30,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:30,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:30,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:31,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:31,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:31,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:31,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:06:31,542 INFO L388 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 6 treesize of output 5 [2021-11-21 00:06:31,576 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:33,605 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:06:33,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:06:33,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2021-11-21 00:06:33,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267343946] [2021-11-21 00:06:33,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:06:33,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:06:33,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:33,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:06:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:06:33,608 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-21 00:06:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:33,721 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2021-11-21 00:06:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:06:33,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 20 [2021-11-21 00:06:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:33,730 INFO L225 Difference]: With dead ends: 115 [2021-11-21 00:06:33,730 INFO L226 Difference]: Without dead ends: 115 [2021-11-21 00:06:33,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:06:33,732 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:33,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 107 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:06:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-21 00:06:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 59. [2021-11-21 00:06:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 58 states have internal predecessors, (70), 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) [2021-11-21 00:06:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-11-21 00:06:33,738 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 20 [2021-11-21 00:06:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:33,738 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-11-21 00:06:33,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-21 00:06:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-11-21 00:06:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:06:33,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:33,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:33,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:06:33,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:33,960 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:06:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045197, now seen corresponding path program 1 times [2021-11-21 00:06:33,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:33,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131658189] [2021-11-21 00:06:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:33,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:06:34,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131658189] [2021-11-21 00:06:34,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131658189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222579768] [2021-11-21 00:06:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:34,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:34,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:06:34,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:06:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 00:06:34,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:06:34,324 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:06:34,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 00:06:34,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 00:06:34,529 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:06:34,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-11-21 00:06:34,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-21 00:06:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:06:34,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:06:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:06:41,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222579768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:06:41,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70261034] [2021-11-21 00:06:41,567 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:06:41,567 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:06:41,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:06:41,568 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:06:41,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:06:41,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:41,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:06:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:41,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:06:42,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:06:42,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:06:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:06:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:06:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:06:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:06:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:06:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:42,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:06:42,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:06:42,928 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:42,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:06:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:42,945 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:06:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:06:42,983 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:06:44,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:44,148 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:44,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:06:44,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:44,183 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:06:44,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 256 treesize of output 257 [2021-11-21 00:06:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:44,245 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:44,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:06:45,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:45,894 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:06:45,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:06:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:45,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:45,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:45,932 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:06:45,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 257 treesize of output 242 [2021-11-21 00:06:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:45,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:45,975 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:06:45,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:06:46,593 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:06:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 280 treesize of output 283 [2021-11-21 00:06:47,360 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:47,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:06:47,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:47,390 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:06:47,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:06:47,439 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:06:47,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:06:48,622 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:06:48,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:06:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:48,697 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:48,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:06:48,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:48,764 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:06:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:06:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:50,359 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:06:50,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:06:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:50,394 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:50,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:06:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:50,428 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:06:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:06:51,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:51,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:51,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:51,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:51,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:51,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:52,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:52,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:52,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:53,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:06:53,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:53,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:06:53,790 INFO L388 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 6 treesize of output 5 [2021-11-21 00:06:53,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:06:53,874 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:56,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:06:56,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:06:56,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2021-11-21 00:06:56,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278757604] [2021-11-21 00:06:56,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:06:56,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:06:56,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:06:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=944, Unknown=1, NotChecked=0, Total=1056 [2021-11-21 00:06:56,148 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 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) [2021-11-21 00:06:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:56,665 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2021-11-21 00:06:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:06:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 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 20 [2021-11-21 00:06:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:56,668 INFO L225 Difference]: With dead ends: 87 [2021-11-21 00:06:56,668 INFO L226 Difference]: Without dead ends: 87 [2021-11-21 00:06:56,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=247, Invalid=1392, Unknown=1, NotChecked=0, Total=1640 [2021-11-21 00:06:56,671 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 406 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:56,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 119 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 275 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-11-21 00:06:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-21 00:06:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-11-21 00:06:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 62 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) [2021-11-21 00:06:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-21 00:06:56,686 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 20 [2021-11-21 00:06:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:56,691 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-21 00:06:56,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 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) [2021-11-21 00:06:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-21 00:06:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:06:56,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:56,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:56,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:06:56,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:56,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:06:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045198, now seen corresponding path program 1 times [2021-11-21 00:06:56,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537218817] [2021-11-21 00:06:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:56,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:06:57,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537218817] [2021-11-21 00:06:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537218817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107579862] [2021-11-21 00:06:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:57,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:57,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:57,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:06:57,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:06:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-21 00:06:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:06:57,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:06:57,586 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:06:57,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-21 00:06:57,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 00:06:57,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-21 00:06:57,991 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:06:57,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-21 00:06:58,009 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:06:58,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:06:58,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-11-21 00:06:58,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-21 00:06:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:06:58,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:00,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_41| Int)) (or (and (forall ((v_DerPreprocessor_3 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) .cse0) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_2) .cse0)))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_41|))) is different from false [2021-11-21 00:07:02,733 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_41| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_41|) (and (forall ((v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) .cse0) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_2) .cse0))))) (forall ((v_DerPreprocessor_3 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))))))) is different from false [2021-11-21 00:07:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2021-11-21 00:07:02,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-11-21 00:07:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 00:07:03,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107579862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:07:03,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605081274] [2021-11-21 00:07:03,131 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:07:03,131 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:03,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:03,132 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:03,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:07:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:07:03,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:07:03,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:07:03,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:07:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:07:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:07:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:07:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:03,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:07:03,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:03,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:07:04,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:04,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:07:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:04,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:07:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:04,526 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:07:04,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:07:04,577 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:04,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:07:04,625 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:07:05,844 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:07:05,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 329 [2021-11-21 00:07:05,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:05,902 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:05,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 340 [2021-11-21 00:07:05,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:05,960 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:05,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:07:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:07,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:07,389 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:07:07,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:07:07,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:07,418 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:07:07,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:07:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:07,444 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:07:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:07:08,031 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:07:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:07:08,799 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:08,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:07:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:08,833 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:07:08,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:07:08,868 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:08,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:07:09,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:09,587 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:09,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:07:09,639 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:07:09,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 256 treesize of output 257 [2021-11-21 00:07:09,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:09,677 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:09,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:07:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:10,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:10,776 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:07:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:07:10,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:10,816 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:07:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:07:10,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:10,851 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:07:10,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:07:11,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:11,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:11,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:12,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:12,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:12,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:13,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:13,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:14,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:14,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:14,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:14,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:07:14,606 INFO L388 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 6 treesize of output 5 [2021-11-21 00:07:14,649 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:07:16,838 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:07:16,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:07:16,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2021-11-21 00:07:16,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66090145] [2021-11-21 00:07:16,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:07:16,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 00:07:16,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 00:07:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1414, Unknown=2, NotChecked=154, Total=1722 [2021-11-21 00:07:16,842 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 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) [2021-11-21 00:07:17,825 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse2 (select .cse3 .cse1)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (= (select |c_#length| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 8) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= (select |c_#length| (select .cse0 .cse1)) 8) (= 8 (select |c_#length| |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (<= .cse2 0) (<= 0 .cse2) (<= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 8) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select .cse3 4) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (= 8 (select |c_#length| (select .cse0 4))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_41| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_41|) (and (forall ((v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) .cse4) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_2) .cse4))))) (forall ((v_DerPreprocessor_3 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))))))) (<= 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) is different from false [2021-11-21 00:07:18,497 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (select .cse2 .cse4))) (and (= 8 (select |c_#length| |c_ULTIMATE.start_main_~s~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_41| Int)) (or (and (forall ((v_DerPreprocessor_3 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_3) .cse0) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_41| v_DerPreprocessor_2) .cse0)))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_41|))) (<= 0 .cse1) (= 0 (select .cse2 4)) (= (select |c_#length| (select .cse3 4)) 8) (= (select |c_#length| (select .cse3 .cse4)) 8) (<= .cse1 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-21 00:07:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:19,195 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2021-11-21 00:07:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:07:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 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 [2021-11-21 00:07:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:19,199 INFO L225 Difference]: With dead ends: 135 [2021-11-21 00:07:19,199 INFO L226 Difference]: Without dead ends: 135 [2021-11-21 00:07:19,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=258, Invalid=2010, Unknown=4, NotChecked=380, Total=2652 [2021-11-21 00:07:19,201 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 266 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:19,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 441 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 515 Invalid, 0 Unknown, 287 Unchecked, 0.5s Time] [2021-11-21 00:07:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-21 00:07:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 68. [2021-11-21 00:07:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 67 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) [2021-11-21 00:07:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2021-11-21 00:07:19,206 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 20 [2021-11-21 00:07:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:19,207 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2021-11-21 00:07:19,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 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) [2021-11-21 00:07:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2021-11-21 00:07:19,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:07:19,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:19,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:19,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:19,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:07:19,431 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:07:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2115654513, now seen corresponding path program 1 times [2021-11-21 00:07:19,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:19,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881463538] [2021-11-21 00:07:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:19,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:07:19,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:19,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881463538] [2021-11-21 00:07:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881463538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:19,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:07:19,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:07:19,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469996229] [2021-11-21 00:07:19,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:19,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:07:19,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:07:19,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:07:19,592 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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) [2021-11-21 00:07:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:19,737 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-11-21 00:07:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:07:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 24 [2021-11-21 00:07:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:19,739 INFO L225 Difference]: With dead ends: 84 [2021-11-21 00:07:19,739 INFO L226 Difference]: Without dead ends: 84 [2021-11-21 00:07:19,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:07:19,740 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 186 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:19,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 42 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:07:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-21 00:07:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-11-21 00:07:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 67 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) [2021-11-21 00:07:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-11-21 00:07:19,745 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 24 [2021-11-21 00:07:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:19,746 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-11-21 00:07:19,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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) [2021-11-21 00:07:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-11-21 00:07:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:07:19,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:19,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:19,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:07:19,748 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:07:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2115734101, now seen corresponding path program 1 times [2021-11-21 00:07:19,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:19,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782307288] [2021-11-21 00:07:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:19,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:07:19,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782307288] [2021-11-21 00:07:19,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782307288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:19,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:07:19,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:07:19,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113066823] [2021-11-21 00:07:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:19,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:07:19,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:07:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:07:19,825 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-11-21 00:07:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:19,861 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2021-11-21 00:07:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:07:19,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 24 [2021-11-21 00:07:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:19,863 INFO L225 Difference]: With dead ends: 82 [2021-11-21 00:07:19,863 INFO L226 Difference]: Without dead ends: 82 [2021-11-21 00:07:19,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:07:19,864 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:19,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 50 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:07:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-21 00:07:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2021-11-21 00:07:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 68 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) [2021-11-21 00:07:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2021-11-21 00:07:19,869 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 24 [2021-11-21 00:07:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:19,870 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2021-11-21 00:07:19,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-11-21 00:07:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2021-11-21 00:07:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:07:19,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:19,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-21 00:07:19,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:07:19,872 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:07:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1047313855, now seen corresponding path program 2 times [2021-11-21 00:07:19,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:19,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705826414] [2021-11-21 00:07:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:19,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:07:19,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705826414] [2021-11-21 00:07:19,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705826414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284301513] [2021-11-21 00:07:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:07:19,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:19,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:19,950 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:19,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:07:20,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:07:20,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:07:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:07:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:07:20,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:07:20,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284301513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:07:20,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900111266] [2021-11-21 00:07:20,214 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:07:20,214 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:20,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:20,215 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:20,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:07:20,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:07:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:07:20,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:07:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:07:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:07:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:07:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:07:20,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:20,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:07:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:20,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:07:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:07:21,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:21,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:07:21,566 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:07:21,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:21,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:21,616 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 00:07:21,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 309 [2021-11-21 00:07:21,699 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 318 [2021-11-21 00:07:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:22,908 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:22,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 336 treesize of output 337 [2021-11-21 00:07:22,976 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 00:07:22,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 334 treesize of output 331 [2021-11-21 00:07:22,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:23,022 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:23,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 341 treesize of output 342 [2021-11-21 00:07:24,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:24,295 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:07:24,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:07:24,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:24,342 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:07:24,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:07:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:24,374 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:07:24,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:07:24,937 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:07:24,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:07:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:25,549 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 00:07:25,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 310 treesize of output 302 [2021-11-21 00:07:25,586 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:25,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 311 [2021-11-21 00:07:25,622 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:07:25,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 318 [2021-11-21 00:07:27,128 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-21 00:07:27,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 263 [2021-11-21 00:07:27,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:27,165 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 265 treesize of output 266 [2021-11-21 00:07:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:27,199 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:07:27,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 263 treesize of output 264 [2021-11-21 00:07:28,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:28,365 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:07:28,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:07:28,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:28,390 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:07:28,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 257 treesize of output 250 [2021-11-21 00:07:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:28,411 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 00:07:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 280 [2021-11-21 00:07:29,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:29,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:29,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:29,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:29,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:29,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:30,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:30,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:30,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:31,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:31,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:07:31,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:31,511 INFO L388 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 6 treesize of output 5 [2021-11-21 00:07:31,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:07:31,590 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:07:33,474 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:07:33,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:07:33,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-21 00:07:33,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418353894] [2021-11-21 00:07:33,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:07:33,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:07:33,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:33,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:07:33,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:07:33,477 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-11-21 00:07:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:33,603 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-11-21 00:07:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:07:33,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 25 [2021-11-21 00:07:33,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:33,604 INFO L225 Difference]: With dead ends: 64 [2021-11-21 00:07:33,604 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 00:07:33,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:07:33,605 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:33,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:07:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 00:07:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-21 00:07:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.488888888888889) internal successors, (67), 55 states have internal predecessors, (67), 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) [2021-11-21 00:07:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-11-21 00:07:33,609 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 25 [2021-11-21 00:07:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:33,609 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-11-21 00:07:33,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-11-21 00:07:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-11-21 00:07:33,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:07:33,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:33,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:33,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:33,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:07:33,836 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:07:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:33,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1624515148, now seen corresponding path program 1 times [2021-11-21 00:07:33,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:33,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530030011] [2021-11-21 00:07:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:33,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:07:34,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:34,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530030011] [2021-11-21 00:07:34,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530030011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:34,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935825692] [2021-11-21 00:07:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:34,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:34,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:34,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:07:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-21 00:07:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:34,414 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:07:34,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:07:34,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:07:34,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-21 00:07:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:07:34,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-11-21 00:07:34,835 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:07:34,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-21 00:07:34,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:07:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:07:34,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:07,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 198 [2021-11-21 00:08:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-21 00:08:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:08:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935825692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:08:07,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467038058] [2021-11-21 00:08:07,799 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:08:07,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:07,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:07,800 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:07,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:07,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:08:08,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:08:08,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:08:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:08:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:08:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:08:08,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:08:08,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:08:08,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:08,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:08:08,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:08,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:08:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:08:09,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:09,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:09,022 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:08:09,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:08:09,072 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:09,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:08:09,118 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:09,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:08:10,238 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:08:10,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 329 [2021-11-21 00:08:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:10,274 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 340 [2021-11-21 00:08:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:10,311 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:08:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:11,726 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:08:11,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:08:11,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:11,753 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:08:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:08:11,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:11,779 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:08:11,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:08:12,190 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:08:12,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:08:12,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:12,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:12,991 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:08:12,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:08:13,025 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:13,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:08:13,057 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:13,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:08:13,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:13,746 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:13,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:08:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:13,790 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:13,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 256 treesize of output 257 [2021-11-21 00:08:13,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:13,827 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:08:13,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 255 [2021-11-21 00:08:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:14,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:14,815 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:08:14,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:08:14,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:14,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:14,839 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:08:14,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:08:14,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:14,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:14,861 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-21 00:08:14,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:08:15,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:15,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:15,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:16,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:16,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:17,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:18,402 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:08:18,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 137 [2021-11-21 00:08:18,431 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:08:18,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:08:18,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:21,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:08:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 00:08:21,311 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:24,513 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:08:24,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:08:24,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 42 [2021-11-21 00:08:24,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694462610] [2021-11-21 00:08:24,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:08:24,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-21 00:08:24,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-21 00:08:24,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2723, Unknown=22, NotChecked=0, Total=2970 [2021-11-21 00:08:24,516 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 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) [2021-11-21 00:08:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:26,834 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2021-11-21 00:08:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:08:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 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) Word has length 26 [2021-11-21 00:08:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:26,836 INFO L225 Difference]: With dead ends: 104 [2021-11-21 00:08:26,836 INFO L226 Difference]: Without dead ends: 104 [2021-11-21 00:08:26,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=638, Invalid=4889, Unknown=23, NotChecked=0, Total=5550 [2021-11-21 00:08:26,839 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 700 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:26,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 240 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 543 Invalid, 0 Unknown, 139 Unchecked, 0.5s Time] [2021-11-21 00:08:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-21 00:08:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 57. [2021-11-21 00:08:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 56 states have internal predecessors, (68), 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) [2021-11-21 00:08:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-11-21 00:08:26,843 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 26 [2021-11-21 00:08:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:26,843 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-11-21 00:08:26,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 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) [2021-11-21 00:08:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-11-21 00:08:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:08:26,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:26,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:26,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:27,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:08:27,048 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:08:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1622162611, now seen corresponding path program 1 times [2021-11-21 00:08:27,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547430658] [2021-11-21 00:08:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:27,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:08:27,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:27,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547430658] [2021-11-21 00:08:27,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547430658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:27,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:08:27,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:08:27,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998259599] [2021-11-21 00:08:27,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:27,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:08:27,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:08:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:08:27,105 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-11-21 00:08:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:27,167 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-11-21 00:08:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:08:27,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 26 [2021-11-21 00:08:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:27,169 INFO L225 Difference]: With dead ends: 64 [2021-11-21 00:08:27,169 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 00:08:27,169 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 [2021-11-21 00:08:27,170 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:27,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:08:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 00:08:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-11-21 00:08:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 51 states have internal predecessors, (56), 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) [2021-11-21 00:08:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-21 00:08:27,174 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 26 [2021-11-21 00:08:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:27,175 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-21 00:08:27,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-11-21 00:08:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-21 00:08:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:08:27,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:27,179 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] [2021-11-21 00:08:27,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 00:08:27,180 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:08:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:27,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2087328355, now seen corresponding path program 1 times [2021-11-21 00:08:27,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:27,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774843296] [2021-11-21 00:08:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:27,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:08:27,253 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774843296] [2021-11-21 00:08:27,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774843296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:27,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:08:27,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:08:27,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466635857] [2021-11-21 00:08:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:27,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:08:27,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:08:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:08:27,255 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-21 00:08:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:27,355 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-21 00:08:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:08:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 [2021-11-21 00:08:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:27,356 INFO L225 Difference]: With dead ends: 61 [2021-11-21 00:08:27,356 INFO L226 Difference]: Without dead ends: 61 [2021-11-21 00:08:27,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:08:27,357 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 171 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:27,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 30 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:08:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-21 00:08:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-11-21 00:08:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 52 states have internal predecessors, (57), 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) [2021-11-21 00:08:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-11-21 00:08:27,360 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 28 [2021-11-21 00:08:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:27,360 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-11-21 00:08:27,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-21 00:08:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-11-21 00:08:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:08:27,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:27,361 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] [2021-11-21 00:08:27,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 00:08:27,362 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:08:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2087327129, now seen corresponding path program 1 times [2021-11-21 00:08:27,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:27,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648300904] [2021-11-21 00:08:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:27,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:08:27,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648300904] [2021-11-21 00:08:27,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648300904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391252101] [2021-11-21 00:08:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:27,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:27,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:27,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:08:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:08:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:08:27,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:08:27,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391252101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:08:27,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365037619] [2021-11-21 00:08:27,712 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-21 00:08:27,712 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:27,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:27,712 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:27,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:27,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:08:28,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:08:28,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:08:28,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:08:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:08:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:08:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:08:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:08:28,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:28,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:08:28,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:28,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:08:28,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:08:28,988 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:28,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:08:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:29,005 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:08:29,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:08:29,042 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:29,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:08:30,059 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:08:30,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:08:30,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,097 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:30,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:08:30,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,136 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:30,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:08:31,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:31,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:31,184 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:08:31,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:08:31,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:31,228 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:08:31,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:08:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:31,282 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:08:31,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:08:31,667 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:08:31,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 280 treesize of output 283 [2021-11-21 00:08:32,404 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:32,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:08:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:32,423 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:08:32,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:08:32,471 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:32,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:08:33,334 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:08:33,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:08:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:33,381 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:33,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:08:33,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:33,420 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:33,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:08:34,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:34,334 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:08:34,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:08:34,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:34,374 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:08:34,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:08:34,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:34,403 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:08:34,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:08:35,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:35,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:35,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:36,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:36,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:36,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:37,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:38,058 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:08:38,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:08:38,091 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:08:38,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:08:42,273 INFO L388 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 6 treesize of output 5 [2021-11-21 00:08:42,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:08:42,364 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:46,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:08:46,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:08:46,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2021-11-21 00:08:46,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529510386] [2021-11-21 00:08:46,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:08:46,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:08:46,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:08:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:08:46,004 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2021-11-21 00:08:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:46,203 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-11-21 00:08:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:08:46,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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 [2021-11-21 00:08:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:46,205 INFO L225 Difference]: With dead ends: 59 [2021-11-21 00:08:46,205 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 00:08:46,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:08:46,206 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:46,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:08:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 00:08:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-11-21 00:08:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 52 states have internal predecessors, (57), 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) [2021-11-21 00:08:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-11-21 00:08:46,209 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 28 [2021-11-21 00:08:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:46,210 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-11-21 00:08:46,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2021-11-21 00:08:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-11-21 00:08:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:08:46,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:46,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:46,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:46,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:46,420 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:08:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash 96397018, now seen corresponding path program 1 times [2021-11-21 00:08:46,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:46,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8373042] [2021-11-21 00:08:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:46,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:08:46,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8373042] [2021-11-21 00:08:46,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8373042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540613421] [2021-11-21 00:08:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:46,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:46,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:46,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:46,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:08:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:08:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:08:46,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:08:46,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540613421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:08:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366508051] [2021-11-21 00:08:46,728 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:08:46,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:46,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:46,729 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:46,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:46,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:08:47,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:08:47,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:08:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:08:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:08:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:08:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:08:47,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:08:47,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:47,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:08:47,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:47,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:08:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:08:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:47,930 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:08:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:08:47,970 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:47,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:08:48,006 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:48,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:08:49,074 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:08:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:08:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:49,113 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:49,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:08:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:49,164 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:49,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:08:50,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:50,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:50,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:50,139 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:08:50,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:08:50,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:50,168 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:08:50,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:08:50,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:50,197 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:08:50,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:08:50,583 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:08:50,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 280 treesize of output 283 [2021-11-21 00:08:51,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:51,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:51,282 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:08:51,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:08:51,320 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:51,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:08:51,355 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:08:51,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:08:52,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:52,255 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:08:52,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:08:52,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:52,319 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:52,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:08:52,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:52,368 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:08:52,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:08:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:53,698 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:08:53,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:08:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:53,724 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 00:08:53,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-21 00:08:53,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:53,753 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:08:53,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:08:54,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:54,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:55,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:55,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:08:55,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:57,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:08:57,348 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:08:57,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:08:57,388 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:08:57,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:09:01,408 INFO L388 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 6 treesize of output 5 [2021-11-21 00:09:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:09:01,485 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:09:05,004 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:09:05,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:09:05,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-21 00:09:05,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696797861] [2021-11-21 00:09:05,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:09:05,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:09:05,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:09:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:09:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:09:05,005 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-11-21 00:09:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:05,084 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-11-21 00:09:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:09:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 30 [2021-11-21 00:09:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:05,088 INFO L225 Difference]: With dead ends: 52 [2021-11-21 00:09:05,088 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 00:09:05,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:09:05,089 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:05,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:09:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 00:09:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-21 00:09:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 51 states have internal predecessors, (55), 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) [2021-11-21 00:09:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-21 00:09:05,092 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 30 [2021-11-21 00:09:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:05,092 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-21 00:09:05,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-11-21 00:09:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-21 00:09:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:09:05,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:05,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:05,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:09:05,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-21 00:09:05,308 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:09:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash 94044481, now seen corresponding path program 1 times [2021-11-21 00:09:05,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:05,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697036782] [2021-11-21 00:09:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:05,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:09:06,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:09:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697036782] [2021-11-21 00:09:06,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697036782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525773006] [2021-11-21 00:09:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:06,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:09:06,032 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:09:06,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:09:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-21 00:09:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:09:06,198 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:09:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:09:06,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:09:06,392 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:09:06,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:09:06,494 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 00:09:06,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 33 [2021-11-21 00:09:06,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-21 00:09:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:09:06,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:09:06,718 INFO L354 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2021-11-21 00:09:06,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-21 00:09:07,591 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_update_at_~head#1.offset| Int) (v_DerPreprocessor_5 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_5)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) is different from false [2021-11-21 00:09:08,271 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_87| Int) (v_DerPreprocessor_5 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_87| v_DerPreprocessor_5)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) is different from false [2021-11-21 00:09:23,914 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_87| Int) (v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_89| Int)) (or (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_89| v_DerPreprocessor_6)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (= .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2))) (store .cse1 .cse0 (store (select .cse1 .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_87| v_DerPreprocessor_5))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse3)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_89|))) is different from false [2021-11-21 00:09:25,938 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_87| Int) (v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_89| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_89|) (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_89| v_DerPreprocessor_6)) (.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (= .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2))) (store .cse1 .cse0 (store (select .cse1 .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_87| v_DerPreprocessor_5))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3)))))) is different from false [2021-11-21 00:09:25,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 345 treesize of output 317 [2021-11-21 00:09:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2021-11-21 00:09:26,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525773006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:09:26,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837815937] [2021-11-21 00:09:26,093 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:09:26,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:09:26,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:09:26,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:09:26,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:09:26,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:26,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:26,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:09:26,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:09:26,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:09:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:26,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:09:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:26,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:09:26,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:26,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:26,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:09:26,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:26,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:09:26,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:09:26,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:09:26,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:09:26,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:09:27,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:09:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:09:27,614 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:09:27,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:09:27,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:27,636 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:09:27,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:09:27,681 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:09:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:09:28,814 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:09:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 329 [2021-11-21 00:09:28,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:28,861 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:09:28,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 340 [2021-11-21 00:09:28,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:28,943 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:09:28,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:09:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:30,377 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:09:30,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:09:30,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:09:30,407 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:09:30,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:09:30,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:09:30,435 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:09:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:09:30,937 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:09:30,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:09:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:31,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:31,639 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:09:31,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:09:31,678 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:09:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:09:31,716 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:09:31,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:09:32,631 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:09:32,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 329 [2021-11-21 00:09:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:32,677 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:09:32,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 340 [2021-11-21 00:09:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:32,723 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:09:32,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:09:34,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:09:34,246 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:09:34,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:09:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:34,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:34,279 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:09:34,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 257 treesize of output 242 [2021-11-21 00:09:34,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:09:34,317 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:09:34,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:09:35,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:09:35,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:09:35,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:09:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:09:36,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:09:36,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:09:38,077 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:09:38,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:09:38,111 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:09:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 131 [2021-11-21 00:09:38,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:09:45,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:09:45,746 INFO L388 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 6 treesize of output 5 [2021-11-21 00:09:45,793 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:09:50,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:09:50,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:09:50,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 13] total 39 [2021-11-21 00:09:50,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104798118] [2021-11-21 00:09:50,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:09:50,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-21 00:09:50,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:09:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-21 00:09:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2360, Unknown=14, NotChecked=404, Total=2970 [2021-11-21 00:09:50,247 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 40 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) [2021-11-21 00:09:52,711 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_87| Int) (v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_89| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_89|) (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_89| v_DerPreprocessor_6)) (.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (= .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2))) (store .cse1 .cse0 (store (select .cse1 .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_87| v_DerPreprocessor_5))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3)))))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (or (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not (= (select .cse4 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select .cse4 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) (+ |c_ULTIMATE.start_node_create_~temp~0#1.offset| 4)) |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| 0)))) is different from false [2021-11-21 00:09:54,720 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_87| Int) (v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_89| Int)) (or (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_89| v_DerPreprocessor_6)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (= .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2))) (store .cse1 .cse0 (store (select .cse1 .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_87| v_DerPreprocessor_5))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse3)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_89|))) (not (= (select .cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)) (or (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select .cse4 4)))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-21 00:09:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:57,350 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-11-21 00:09:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:09:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 40 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) Word has length 30 [2021-11-21 00:09:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:57,352 INFO L225 Difference]: With dead ends: 67 [2021-11-21 00:09:57,352 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 00:09:57,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=408, Invalid=4022, Unknown=16, NotChecked=810, Total=5256 [2021-11-21 00:09:57,356 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 240 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:57,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 292 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 672 Invalid, 0 Unknown, 282 Unchecked, 0.5s Time] [2021-11-21 00:09:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 00:09:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2021-11-21 00:09:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 54 states have internal predecessors, (61), 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) [2021-11-21 00:09:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-11-21 00:09:57,360 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 30 [2021-11-21 00:09:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:57,360 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-11-21 00:09:57,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 40 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) [2021-11-21 00:09:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-11-21 00:09:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:09:57,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:57,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:57,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:09:57,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-21 00:09:57,562 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:09:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash 94044482, now seen corresponding path program 1 times [2021-11-21 00:09:57,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:57,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387926513] [2021-11-21 00:09:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:57,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:09:58,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:09:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387926513] [2021-11-21 00:09:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387926513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227350930] [2021-11-21 00:09:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:58,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:58,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:09:58,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:09:58,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:09:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:58,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-21 00:09:58,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:09:58,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:09:58,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:09:58,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:09:58,489 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:09:58,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:09:58,606 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:09:58,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 89 [2021-11-21 00:09:58,617 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:09:58,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 62 [2021-11-21 00:09:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2021-11-21 00:09:58,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-11-21 00:09:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:09:58,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:09:58,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:09:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 65 [2021-11-21 00:09:59,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:09:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 135 [2021-11-21 00:09:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:09:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227350930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:09:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589747634] [2021-11-21 00:09:59,721 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:09:59,722 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:09:59,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:09:59,722 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:09:59,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:09:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:59,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:10:00,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:10:00,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:10:00,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:10:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:10:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:10:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:10:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:00,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:10:00,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:00,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:10:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:10:00,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:00,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:10:01,047 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:10:01,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:01,067 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:01,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:10:01,110 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:01,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:10:02,082 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:10:02,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:10:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:02,128 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:02,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:10:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:02,171 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:02,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:10:03,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:03,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:03,594 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:10:03,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:10:03,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:03,622 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:10:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:10:03,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:03,650 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:10:03,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:10:04,165 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:10:04,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:10:04,907 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:04,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:10:04,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:04,928 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:10:04,974 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:04,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:10:05,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:05,936 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:05,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 336 treesize of output 337 [2021-11-21 00:10:06,001 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:10:06,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 334 treesize of output 327 [2021-11-21 00:10:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:06,053 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:06,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:10:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:07,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:07,485 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:10:07,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:10:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:07,523 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:10:07,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:10:07,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:07,550 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:10:07,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:10:08,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:08,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:08,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:10:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:09,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:10:09,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:11,186 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:10:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:10:11,213 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:10:11,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:10:11,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:10:19,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:10:19,114 INFO L388 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 6 treesize of output 5 [2021-11-21 00:10:19,162 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:10:24,035 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:10:24,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:10:24,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 38 [2021-11-21 00:10:24,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440861983] [2021-11-21 00:10:24,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:24,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-21 00:10:24,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:10:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-21 00:10:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2667, Unknown=0, NotChecked=0, Total=2862 [2021-11-21 00:10:24,044 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 39 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 39 states have internal predecessors, (79), 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) [2021-11-21 00:10:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:26,653 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-11-21 00:10:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 00:10:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 39 states have internal predecessors, (79), 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 30 [2021-11-21 00:10:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:26,654 INFO L225 Difference]: With dead ends: 89 [2021-11-21 00:10:26,655 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 00:10:26,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=733, Invalid=4967, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 00:10:26,657 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 894 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:26,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 177 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 706 Invalid, 0 Unknown, 37 Unchecked, 0.7s Time] [2021-11-21 00:10:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 00:10:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2021-11-21 00:10:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 54 states have internal predecessors, (60), 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) [2021-11-21 00:10:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-11-21 00:10:26,661 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 30 [2021-11-21 00:10:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:26,661 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-11-21 00:10:26,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 39 states have internal predecessors, (79), 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) [2021-11-21 00:10:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-11-21 00:10:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:10:26,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:26,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:26,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 00:10:26,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:26,872 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:10:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:26,875 INFO L85 PathProgramCache]: Analyzing trace with hash 94042026, now seen corresponding path program 1 times [2021-11-21 00:10:26,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:10:26,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020969062] [2021-11-21 00:10:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:26,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:10:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:10:26,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:10:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020969062] [2021-11-21 00:10:26,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020969062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:10:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782872527] [2021-11-21 00:10:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:26,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:26,936 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:26,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:10:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:10:27,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:10:27,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:10:27,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782872527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [728020394] [2021-11-21 00:10:27,171 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:10:27,171 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:10:27,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:10:27,172 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:10:27,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:10:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:10:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:10:27,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:10:27,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:10:27,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:10:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:10:27,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:10:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:10:27,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:27,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:10:28,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:10:28,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:28,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:28,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:28,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:28,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:10:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:28,647 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:28,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:10:28,702 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:28,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:10:28,755 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:28,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:10:29,654 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:10:29,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:10:29,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:29,700 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:29,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:10:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:29,745 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:29,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:10:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:30,913 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:10:30,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:10:30,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:30,943 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:10:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:10:30,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:30,971 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:10:30,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:10:31,432 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:10:31,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:10:32,201 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:32,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:10:32,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:32,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:32,217 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:32,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:10:32,258 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:32,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:10:33,227 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:10:33,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 329 [2021-11-21 00:10:33,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:33,281 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:33,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 340 [2021-11-21 00:10:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:33,333 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:33,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:10:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:34,685 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:10:34,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:10:34,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:34,714 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:10:34,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:10:34,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:34,741 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:10:34,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:10:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:10:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:37,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:10:37,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:10:38,502 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:10:38,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 137 [2021-11-21 00:10:38,534 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:10:38,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:10:39,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:10:46,318 INFO L388 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 6 treesize of output 5 [2021-11-21 00:10:46,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:10:46,393 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:10:49,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:10:49,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:10:49,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2021-11-21 00:10:49,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013791298] [2021-11-21 00:10:49,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:49,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:10:49,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:10:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:10:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:10:49,915 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-11-21 00:10:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:50,012 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-21 00:10:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:10:50,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 30 [2021-11-21 00:10:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:50,013 INFO L225 Difference]: With dead ends: 47 [2021-11-21 00:10:50,013 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 00:10:50,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:10:50,014 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:50,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:10:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 00:10:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-21 00:10:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 46 states have internal predecessors, (49), 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) [2021-11-21 00:10:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-21 00:10:50,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 30 [2021-11-21 00:10:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:50,017 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-21 00:10:50,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-11-21 00:10:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-21 00:10:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:10:50,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:50,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:50,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:50,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-21 00:10:50,218 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:10:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:50,218 INFO L85 PathProgramCache]: Analyzing trace with hash 182493149, now seen corresponding path program 1 times [2021-11-21 00:10:50,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:10:50,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013901807] [2021-11-21 00:10:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:50,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:10:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:50,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:10:50,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013901807] [2021-11-21 00:10:50,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013901807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:10:50,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124066458] [2021-11-21 00:10:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:50,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:50,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:50,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:10:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:50,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-21 00:10:50,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:51,045 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:10:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:10:51,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:10:51,302 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:10:51,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:10:51,512 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:10:51,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 86 [2021-11-21 00:10:51,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2021-11-21 00:10:51,527 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:10:51,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 00:10:51,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2021-11-21 00:10:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:10:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-21 00:10:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:51,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:52,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 138 [2021-11-21 00:10:52,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:10:52,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 55 [2021-11-21 00:10:52,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-11-21 00:10:54,626 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_DerPreprocessor_12 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_DerPreprocessor_12) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))))) is different from false [2021-11-21 00:10:56,639 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_DerPreprocessor_12 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_DerPreprocessor_12) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) is different from false [2021-11-21 00:10:56,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 00:10:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-21 00:10:56,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124066458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29536616] [2021-11-21 00:10:56,722 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-21 00:10:56,722 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:10:56,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:10:56,723 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:10:56,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:10:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:56,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:56,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:10:57,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:10:57,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:10:57,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:10:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:10:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:10:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:10:57,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:57,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:10:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:10:57,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:57,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:10:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:57,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:10:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:58,090 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:58,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:10:58,132 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:58,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:10:58,171 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:10:58,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:10:59,058 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:10:59,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:10:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:59,102 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:59,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:10:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:59,144 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:10:59,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:11:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:00,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:00,230 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:11:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:11:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:00,282 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:11:00,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:11:00,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:00,325 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:11:00,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:11:00,785 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:11:00,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:11:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:01,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:01,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:11:01,496 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:11:01,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:11:01,537 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:11:01,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:11:02,665 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:11:02,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 329 [2021-11-21 00:11:02,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:02,712 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:11:02,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 340 [2021-11-21 00:11:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:02,756 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:11:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:11:04,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:04,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:04,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:04,054 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:11:04,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:11:04,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:04,087 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:11:04,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:11:04,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:04,122 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:11:04,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:11:04,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:04,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:11:05,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:06,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:06,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:11:06,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:07,872 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:11:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:11:07,906 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:11:07,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 131 [2021-11-21 00:11:08,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:11:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:11:15,978 INFO L388 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 6 treesize of output 5 [2021-11-21 00:11:16,013 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:11:20,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:11:20,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:11:20,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 43 [2021-11-21 00:11:20,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773495157] [2021-11-21 00:11:20,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:20,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-21 00:11:20,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-21 00:11:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2895, Unknown=2, NotChecked=218, Total=3306 [2021-11-21 00:11:20,908 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 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) [2021-11-21 00:11:21,759 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_DerPreprocessor_12 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_DerPreprocessor_12) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0)) is different from false [2021-11-21 00:11:22,272 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_DerPreprocessor_12 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_DerPreprocessor_12) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)) is different from false [2021-11-21 00:11:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:23,436 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-11-21 00:11:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:11:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 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) Word has length 32 [2021-11-21 00:11:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:23,437 INFO L225 Difference]: With dead ends: 49 [2021-11-21 00:11:23,438 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 00:11:23,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=388, Invalid=4880, Unknown=4, NotChecked=580, Total=5852 [2021-11-21 00:11:23,440 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:23,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 344 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 781 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2021-11-21 00:11:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 00:11:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-11-21 00:11:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 44 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) [2021-11-21 00:11:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-21 00:11:23,443 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-11-21 00:11:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:23,444 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-21 00:11:23,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 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) [2021-11-21 00:11:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-21 00:11:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:11:23,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:23,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:23,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-21 00:11:23,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-21 00:11:23,660 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:11:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -716344597, now seen corresponding path program 1 times [2021-11-21 00:11:23,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:23,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984685039] [2021-11-21 00:11:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:23,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:11:23,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:23,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984685039] [2021-11-21 00:11:23,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984685039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:11:23,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:11:23,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:11:23,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935401357] [2021-11-21 00:11:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:11:23,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:11:23,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:23,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:11:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:11:23,757 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-11-21 00:11:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:23,900 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-21 00:11:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:11:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 [2021-11-21 00:11:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:23,901 INFO L225 Difference]: With dead ends: 49 [2021-11-21 00:11:23,901 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 00:11:23,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:11:23,902 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:23,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 9 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:11:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 00:11:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-11-21 00:11:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.146341463414634) internal successors, (47), 45 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) [2021-11-21 00:11:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-21 00:11:23,905 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 34 [2021-11-21 00:11:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:23,905 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-21 00:11:23,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-11-21 00:11:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-21 00:11:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:11:23,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:23,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:23,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-21 00:11:23,906 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:11:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1212364125, now seen corresponding path program 1 times [2021-11-21 00:11:23,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:23,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430152540] [2021-11-21 00:11:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:23,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:11:23,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:23,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430152540] [2021-11-21 00:11:23,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430152540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:11:23,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:11:23,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:11:23,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522636951] [2021-11-21 00:11:23,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:11:23,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:11:23,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:11:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:11:23,978 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 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) [2021-11-21 00:11:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:24,092 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-11-21 00:11:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:11:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 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 36 [2021-11-21 00:11:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:24,093 INFO L225 Difference]: With dead ends: 47 [2021-11-21 00:11:24,093 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 00:11:24,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:11:24,094 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:24,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 12 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:11:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 00:11:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-21 00:11:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 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) [2021-11-21 00:11:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-21 00:11:24,096 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2021-11-21 00:11:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:24,097 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-21 00:11:24,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 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) [2021-11-21 00:11:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-21 00:11:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:11:24,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:24,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:24,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-21 00:11:24,097 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:11:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1159493043, now seen corresponding path program 1 times [2021-11-21 00:11:24,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:24,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950023220] [2021-11-21 00:11:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:24,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:11:24,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:24,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950023220] [2021-11-21 00:11:24,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950023220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:11:24,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164193649] [2021-11-21 00:11:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:24,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:24,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:24,354 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:24,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:11:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-21 00:11:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:24,542 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:11:24,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:11:24,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-21 00:11:24,814 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 00:11:24,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-11-21 00:11:24,951 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:11:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2021-11-21 00:11:25,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:11:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 00:11:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:11:25,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:25,997 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (|ULTIMATE.start_sll_update_at_~head#1.offset| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_13)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2021-11-21 00:11:26,688 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_128| Int)) (not (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_128| v_DerPreprocessor_13))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2021-11-21 00:11:27,406 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_128| Int)) (not (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_128| v_DerPreprocessor_13))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2021-11-21 00:11:37,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_14 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_128| Int)) (or (not (= (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_DerPreprocessor_14))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2)) (.cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_128| v_DerPreprocessor_13)))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|))) is different from false [2021-11-21 00:11:39,896 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_14 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_128| Int)) (or (not (= (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_DerPreprocessor_14))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2)) (.cse1 (select .cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_128| v_DerPreprocessor_13)))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|))) is different from false [2021-11-21 00:11:39,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 240 [2021-11-21 00:11:39,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 282 [2021-11-21 00:11:40,036 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:11:40,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-21 00:11:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-21 00:11:40,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164193649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795277098] [2021-11-21 00:11:40,049 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 00:11:40,049 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:40,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:40,050 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:40,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:11:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:11:40,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:11:40,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:11:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:11:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:11:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:11:40,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:11:40,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:40,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:11:40,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:11:40,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:40,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:11:40,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:11:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:41,135 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:41,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:11:41,169 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:11:41,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:11:41,201 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:11:41,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:11:41,961 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:11:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:11:41,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:42,005 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:11:42,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:11:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:42,047 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:11:42,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:11:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:42,855 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:11:42,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:11:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:42,879 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:11:42,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 257 treesize of output 250 [2021-11-21 00:11:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:42,914 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 00:11:42,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 280 [2021-11-21 00:11:43,232 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:11:43,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 280 treesize of output 283 [2021-11-21 00:11:43,925 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:11:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:11:43,958 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:11:43,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 324 [2021-11-21 00:11:43,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:43,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:43,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 324 treesize of output 306 [2021-11-21 00:11:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:44,563 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:11:44,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:11:44,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:44,596 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:11:44,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 256 treesize of output 257 [2021-11-21 00:11:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:44,630 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:11:44,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:11:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:45,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:45,584 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:11:45,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:11:45,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:45,608 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:11:45,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:11:45,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:45,641 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:11:45,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:11:46,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:11:46,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:46,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:47,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:47,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:11:47,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:11:48,793 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:11:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:11:48,817 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:11:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 131 [2021-11-21 00:11:49,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:11:54,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:11:55,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:11:55,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:11:57,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:11:57,188 INFO L388 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 6 treesize of output 5 [2021-11-21 00:11:57,221 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:01,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:01,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:12:01,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 18] total 36 [2021-11-21 00:12:01,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512350611] [2021-11-21 00:12:01,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:01,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 00:12:01,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 00:12:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2359, Unknown=11, NotChecked=510, Total=3080 [2021-11-21 00:12:01,504 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 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) [2021-11-21 00:12:03,232 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (and (not (= .cse0 0)) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| 0)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0)) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| 0)) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_14 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_128| Int)) (or (not (= (select (select (let ((.cse3 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_DerPreprocessor_14))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse3)) (.cse2 (select .cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (store .cse1 .cse2 (store (select .cse1 .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_128| v_DerPreprocessor_13)))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|))) (= (select |c_#valid| 0) 0) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| 0)))) is different from false [2021-11-21 00:12:04,591 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= 0 .cse0)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_#valid| 0) 0) (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_14 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_128| Int)) (or (not (= (select (select (let ((.cse3 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_DerPreprocessor_14))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse3)) (.cse2 (select .cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (store .cse1 .cse2 (store (select .cse1 .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_128| v_DerPreprocessor_13)))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-21 00:12:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:12,665 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-21 00:12:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:12:12,666 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 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) Word has length 39 [2021-11-21 00:12:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:12,666 INFO L225 Difference]: With dead ends: 56 [2021-11-21 00:12:12,667 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 00:12:12,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=456, Invalid=4526, Unknown=16, NotChecked=1008, Total=6006 [2021-11-21 00:12:12,669 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 121 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:12,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 58 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 605 Invalid, 0 Unknown, 309 Unchecked, 0.3s Time] [2021-11-21 00:12:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 00:12:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-11-21 00:12:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 48 states have internal predecessors, (50), 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) [2021-11-21 00:12:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-21 00:12:12,672 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 39 [2021-11-21 00:12:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:12,672 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-21 00:12:12,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 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) [2021-11-21 00:12:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-21 00:12:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:12:12,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:12,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:12,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:12,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-21 00:12:12,888 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:12:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494269, now seen corresponding path program 1 times [2021-11-21 00:12:12,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:12,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108406745] [2021-11-21 00:12:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:12,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:13,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108406745] [2021-11-21 00:12:13,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108406745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:13,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97660731] [2021-11-21 00:12:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:13,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:13,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:13,256 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:13,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:12:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-21 00:12:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:13,373 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:12:13,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:12:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:12:13,480 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 00:12:13,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:12:13,558 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:12:13,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-21 00:12:13,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 00:12:13,736 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:12:13,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:12:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:12:13,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:13,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 45 [2021-11-21 00:12:16,184 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|) (and (forall ((v_DerPreprocessor_16 Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16))) (= (select .cse0 4) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_DerPreprocessor_16 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))))) is different from false [2021-11-21 00:12:18,208 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int)) (or (and (forall ((v_DerPreprocessor_16 Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16))) (= (select .cse0 4) (select .cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))))) (forall ((v_DerPreprocessor_16 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|))) is different from false [2021-11-21 00:12:18,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2021-11-21 00:12:18,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 276 [2021-11-21 00:12:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 3 not checked. [2021-11-21 00:12:18,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97660731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:18,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596355123] [2021-11-21 00:12:18,413 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:12:18,413 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:12:18,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:12:18,414 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:12:18,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:12:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:18,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:12:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:12:18,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:18,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:12:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:18,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:12:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:18,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:12:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:19,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:12:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:12:19,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:19,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:12:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:12:19,631 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:12:19,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:12:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:19,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:19,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:12:19,682 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:12:19,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:12:20,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:20,510 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:12:20,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 336 treesize of output 337 [2021-11-21 00:12:20,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:20,547 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:12:20,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 327 [2021-11-21 00:12:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:20,581 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:12:20,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:12:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:21,837 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:12:21,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:12:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:21,862 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:12:21,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:12:21,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:21,886 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:12:21,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:12:22,290 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:12:22,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:12:22,934 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:12:22,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:12:22,965 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:12:22,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 324 [2021-11-21 00:12:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:22,980 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 324 treesize of output 306 [2021-11-21 00:12:23,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:23,634 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:12:23,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:12:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:23,667 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:12:23,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:12:23,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:23,700 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:12:23,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:12:24,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:24,748 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:12:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:12:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:24,769 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 00:12:24,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-21 00:12:24,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:24,793 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:12:24,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:12:25,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:12:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:12:25,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:12:26,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:12:26,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:12:26,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:12:27,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:12:27,985 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:12:27,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 137 [2021-11-21 00:12:28,010 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:12:28,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:12:33,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:34,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:12:35,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:12:36,263 INFO L388 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 6 treesize of output 5 [2021-11-21 00:12:36,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:36,322 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:40,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:40,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:12:40,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 32 [2021-11-21 00:12:40,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204895137] [2021-11-21 00:12:40,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:40,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:12:40,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:12:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2260, Unknown=2, NotChecked=194, Total=2652 [2021-11-21 00:12:40,338 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 33 states, 32 states have (on average 2.34375) internal successors, (75), 33 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) [2021-11-21 00:12:40,959 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int)) (or (and (forall ((v_DerPreprocessor_16 Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16))) (= (select .cse0 4) (select .cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))))) (forall ((v_DerPreprocessor_16 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) is different from false [2021-11-21 00:12:41,405 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|) (and (forall ((v_DerPreprocessor_16 Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16))) (= (select .cse0 4) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_DerPreprocessor_16 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_DerPreprocessor_16) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)) is different from false [2021-11-21 00:12:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:41,710 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-11-21 00:12:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:12:41,711 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.34375) internal successors, (75), 33 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) Word has length 39 [2021-11-21 00:12:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:41,711 INFO L225 Difference]: With dead ends: 54 [2021-11-21 00:12:41,711 INFO L226 Difference]: Without dead ends: 54 [2021-11-21 00:12:41,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=294, Invalid=3258, Unknown=4, NotChecked=476, Total=4032 [2021-11-21 00:12:41,713 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:41,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 111 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 452 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2021-11-21 00:12:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-21 00:12:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-11-21 00:12:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 49 states have internal predecessors, (52), 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) [2021-11-21 00:12:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-11-21 00:12:41,715 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2021-11-21 00:12:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:41,716 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-11-21 00:12:41,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.34375) internal successors, (75), 33 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) [2021-11-21 00:12:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-11-21 00:12:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:12:41,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:41,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:41,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:41,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:41,927 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:12:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494268, now seen corresponding path program 1 times [2021-11-21 00:12:41,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:41,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602252392] [2021-11-21 00:12:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:41,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:12:42,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602252392] [2021-11-21 00:12:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602252392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948745934] [2021-11-21 00:12:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:42,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:42,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:42,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:12:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-21 00:12:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:43,023 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:12:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 00:12:43,041 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:12:43,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:12:43,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:12:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:12:43,365 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 00:12:43,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 42 [2021-11-21 00:12:43,374 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 00:12:43,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-21 00:12:43,531 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:12:43,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 53 [2021-11-21 00:12:43,540 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 00:12:43,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-21 00:12:43,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:43,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-11-21 00:12:43,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:12:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:12:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:12:44,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:48,974 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_17 Int) (v_subst_6 Int)) (<= 0 (+ 4 (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) v_subst_6 v_DerPreprocessor_17))) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (forall ((v_DerPreprocessor_17 Int) (v_DerPreprocessor_18 Int) (v_subst_5 Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) v_subst_5 v_DerPreprocessor_17)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) v_subst_5 v_DerPreprocessor_18)) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) is different from false [2021-11-21 00:14:29,074 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_152| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_152|) (and (forall ((v_DerPreprocessor_17 Int) (v_subst_6 Int) (v_DerPreprocessor_19 Int) (v_DerPreprocessor_20 Int)) (<= 0 (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_20))) (.cse1 (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_19) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (store .cse0 .cse1 (store (select .cse0 .cse1) v_subst_6 v_DerPreprocessor_17))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))) (forall ((v_prenex_4 Int) (v_DerPreprocessor_18 Int) (v_subst_5 Int) (v_DerPreprocessor_19 Int) (v_DerPreprocessor_20 Int)) (let ((.cse5 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_19))) (let ((.cse3 (select .cse5 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_20)))) (store .cse2 .cse3 (store (select .cse2 .cse3) v_subst_5 v_prenex_4))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse5))) (store .cse4 .cse3 (store (select .cse4 .cse3) v_subst_5 v_DerPreprocessor_18))) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))))))) is different from false [2021-11-21 00:14:31,113 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_152| Int)) (or (and (forall ((v_prenex_4 Int) (v_DerPreprocessor_18 Int) (v_subst_5 Int) (v_DerPreprocessor_19 Int) (v_DerPreprocessor_20 Int)) (let ((.cse3 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_19))) (let ((.cse1 (select .cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_20)))) (store .cse0 .cse1 (store (select .cse0 .cse1) v_subst_5 v_prenex_4))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 8) (select |c_#length| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse3))) (store .cse2 .cse1 (store (select .cse2 .cse1) v_subst_5 v_DerPreprocessor_18))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4)))))) (forall ((v_DerPreprocessor_17 Int) (v_subst_6 Int) (v_DerPreprocessor_19 Int) (v_DerPreprocessor_20 Int)) (<= 0 (+ 4 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_20))) (.cse5 (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_152| v_DerPreprocessor_19) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (store .cse4 .cse5 (store (select .cse4 .cse5) v_subst_6 v_DerPreprocessor_17))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_152|))) is different from false [2021-11-21 00:14:31,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7477 treesize of output 7413 [2021-11-21 00:14:31,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20533 treesize of output 19281 [2021-11-21 00:14:31,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22372 treesize of output 22244 [2021-11-21 00:14:31,406 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:14:31,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828951324] [2021-11-21 00:14:31,409 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:14:31,409 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:14:31,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:14:31,410 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:14:31,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:14:31,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:31,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:31,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:14:31,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:14:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:31,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:14:31,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:14:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:31,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:14:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:31,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:14:32,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:14:32,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:32,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:14:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:14:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:14:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:14:32,734 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:14:32,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:14:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,750 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:14:32,785 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:14:32,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:14:33,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:33,763 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:14:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 336 treesize of output 329 [2021-11-21 00:14:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:33,800 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:14:33,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 340 [2021-11-21 00:14:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:33,832 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:14:33,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 338 [2021-11-21 00:14:34,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:34,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:34,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:34,771 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:14:34,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:14:34,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:34,796 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:14:34,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:14:34,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:34,822 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:14:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:14:35,339 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:14:35,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:14:36,013 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:14:36,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:14:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:36,029 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:36,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:14:36,066 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:14:36,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:14:36,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:36,817 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:14:36,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:14:36,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:36,853 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:14:36,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 256 treesize of output 257 [2021-11-21 00:14:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:36,891 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:14:36,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:14:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:37,861 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:14:37,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:14:37,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:37,897 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:14:37,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:14:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:37,931 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:14:37,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:14:38,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:14:38,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:14:38,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:14:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:14:39,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:14:40,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:14:41,133 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:14:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:14:41,160 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:14:41,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 131 [2021-11-21 00:14:41,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:14:47,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:14:48,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:14:48,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:14:49,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:14:49,931 INFO L388 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 6 treesize of output 5 [2021-11-21 00:14:49,943 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:14:55,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:14:55,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:14:55,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-21 00:14:55,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674783315] [2021-11-21 00:14:55,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:14:55,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 00:14:55,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 00:14:55,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4254, Unknown=51, NotChecked=402, Total=4970 [2021-11-21 00:14:55,283 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 26 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 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) [2021-11-21 00:14:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:57,867 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-21 00:14:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 00:14:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 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 39 [2021-11-21 00:14:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:57,868 INFO L225 Difference]: With dead ends: 58 [2021-11-21 00:14:57,868 INFO L226 Difference]: Without dead ends: 58 [2021-11-21 00:14:57,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 115.3s TimeCoverageRelationStatistics Valid=669, Invalid=7482, Unknown=51, NotChecked=540, Total=8742 [2021-11-21 00:14:57,869 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 186 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:57,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 52 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:14:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-21 00:14:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-11-21 00:14:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 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) [2021-11-21 00:14:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-21 00:14:57,871 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 39 [2021-11-21 00:14:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:57,872 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-21 00:14:57,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 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) [2021-11-21 00:14:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-21 00:14:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:14:57,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:57,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:57,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-21 00:14:58,086 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:14:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1877435652, now seen corresponding path program 1 times [2021-11-21 00:14:58,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:58,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644975403] [2021-11-21 00:14:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:58,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:14:58,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:58,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644975403] [2021-11-21 00:14:58,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644975403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:58,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906219325] [2021-11-21 00:14:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:58,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:58,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:58,750 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:58,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:14:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:58,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-21 00:14:58,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:58,930 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:14:58,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:14:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:14:59,164 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 00:14:59,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-11-21 00:14:59,287 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:14:59,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 00:14:59,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:14:59,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:14:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:14:59,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:15:36,043 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_164| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int) (v_DerPreprocessor_21 Int)) (or (< (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_164| v_DerPreprocessor_22))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2)) (.cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_DerPreprocessor_21)))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_164|))) is different from false [2021-11-21 00:15:37,715 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_164| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int) (v_DerPreprocessor_21 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_164|) (< (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_164| v_DerPreprocessor_22))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2)) (.cse1 (select .cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_DerPreprocessor_21)))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|))) is different from false [2021-11-21 00:15:37,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 231 [2021-11-21 00:15:37,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 273 [2021-11-21 00:15:38,067 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:15:38,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 00:15:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 3 not checked. [2021-11-21 00:15:38,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906219325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:15:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414177878] [2021-11-21 00:15:38,083 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:15:38,083 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:15:38,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:15:38,085 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:15:38,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:15:38,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:15:38,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:15:38,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:15:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:15:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:15:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:15:38,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:15:38,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:15:38,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:38,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:15:38,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:38,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:15:38,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:38,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:15:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:39,199 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:15:39,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:15:39,252 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:15:39,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:15:39,301 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:15:39,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:15:40,190 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:15:40,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:15:40,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:40,227 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:15:40,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:15:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:40,263 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:15:40,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:15:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:41,397 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:15:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 252 [2021-11-21 00:15:41,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:41,422 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:15:41,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 241 [2021-11-21 00:15:41,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:41,447 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:15:41,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:15:41,826 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:15:41,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 278 [2021-11-21 00:15:42,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:42,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:42,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:15:42,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 310 treesize of output 292 [2021-11-21 00:15:42,423 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:15:42,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-21 00:15:42,458 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:15:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:15:43,313 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:15:43,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:15:43,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:43,351 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:15:43,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:15:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:43,387 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:15:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:15:44,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:44,332 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:15:44,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:15:44,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:44,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:44,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:44,359 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 00:15:44,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-21 00:15:44,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:44,400 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:15:44,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:15:45,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:15:45,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:15:45,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:15:46,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:15:46,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:15:46,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:15:47,689 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:15:47,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:15:47,717 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:15:47,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 133 [2021-11-21 00:15:48,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:15:53,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:15:54,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:15:55,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:15:56,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:15:56,346 INFO L388 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 6 treesize of output 5 [2021-11-21 00:15:56,397 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:16:01,106 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:16:01,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:16:01,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 17] total 44 [2021-11-21 00:16:01,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553747216] [2021-11-21 00:16:01,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:16:01,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-21 00:16:01,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-21 00:16:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3519, Unknown=21, NotChecked=242, Total=4032 [2021-11-21 00:16:01,110 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 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) [2021-11-21 00:16:03,559 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse0 (select .cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (and (< .cse0 |c_#StackHeapBarrier|) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (< |c_ULTIMATE.start_sll_create_~head~0#1.base| |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0)) (<= (+ (select .cse1 4) 1) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (<= (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_164| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int) (v_DerPreprocessor_21 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_164|) (< (select (select (let ((.cse4 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_164| v_DerPreprocessor_22))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse4)) (.cse3 (select .cse4 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_DerPreprocessor_21)))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|))) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_sll_create_~head~0#1.base| 1) |c_#StackHeapBarrier|)))) is different from false [2021-11-21 00:16:05,245 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_164| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int) (v_DerPreprocessor_21 Int)) (or (< (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_164| v_DerPreprocessor_22))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2)) (.cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_DerPreprocessor_21)))) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_164|))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse3)) (< .cse3 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (<= (+ 1 .cse3) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-21 00:16:08,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:08,948 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-21 00:16:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 00:16:08,948 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 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 41 [2021-11-21 00:16:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:08,949 INFO L225 Difference]: With dead ends: 56 [2021-11-21 00:16:08,949 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 00:16:08,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=495, Invalid=5978, Unknown=23, NotChecked=644, Total=7140 [2021-11-21 00:16:08,951 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:08,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 145 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 678 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2021-11-21 00:16:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 00:16:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-11-21 00:16:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 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) [2021-11-21 00:16:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-21 00:16:08,953 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 41 [2021-11-21 00:16:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:08,954 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-21 00:16:08,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 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) [2021-11-21 00:16:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-21 00:16:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:16:08,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:08,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:08,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:16:09,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:09,160 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:16:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1621217452, now seen corresponding path program 2 times [2021-11-21 00:16:09,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:09,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760342051] [2021-11-21 00:16:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:09,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:16:10,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760342051] [2021-11-21 00:16:10,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760342051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:16:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99802684] [2021-11-21 00:16:10,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:16:10,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:10,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:16:10,352 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:16:10,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 00:16:10,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:16:10,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:16:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-21 00:16:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:16:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-21 00:16:10,906 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:16:10,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2021-11-21 00:16:11,090 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 00:16:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 46 [2021-11-21 00:16:11,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-11-21 00:16:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:16:11,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:16:37,376 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_23 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_174| Int)) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_174| v_DerPreprocessor_23))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2021-11-21 00:16:51,992 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_24 Int) (v_DerPreprocessor_23 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_176| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_174| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_176|) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_176| v_DerPreprocessor_24))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2)) (.cse1 (select .cse2 .cse3))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_174| v_DerPreprocessor_23)))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse3)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2021-11-21 00:16:54,010 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_24 Int) (v_DerPreprocessor_23 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_176| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_174| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_176|) (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_176| v_DerPreprocessor_24))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2)) (.cse1 (select .cse2 .cse3))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_174| v_DerPreprocessor_23)))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2021-11-21 00:16:54,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 161 [2021-11-21 00:17:00,912 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_23 Int) (v_antiDerIndex_entry0_1 Int)) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1)) (.cse1 (store |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base| 0))) (or (= .cse0 (select (store .cse1 v_DerPreprocessor_23 0) v_antiDerIndex_entry0_1)) (and (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= .cse0 (select (store .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) v_antiDerIndex_entry0_1)))))) is different from false [2021-11-21 00:17:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 2 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-21 00:17:07,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99802684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:17:07,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837043455] [2021-11-21 00:17:07,773 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 00:17:07,773 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:17:07,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:17:07,773 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:17:07,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:17:07,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:07,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:07,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:17:08,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:17:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:17:08,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:17:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:17:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:17:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:17:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:08,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:17:08,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:08,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:17:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:17:08,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:17:09,130 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:17:09,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:17:09,171 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:17:09,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 324 [2021-11-21 00:17:09,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:09,189 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:17:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 324 treesize of output 306 [2021-11-21 00:17:10,049 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:17:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:17:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:10,094 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:17:10,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:17:10,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:10,137 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:17:10,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:17:11,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:11,121 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:17:11,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:17:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:11,148 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-21 00:17:11,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 257 treesize of output 242 [2021-11-21 00:17:11,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:11,179 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:17:11,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 231 [2021-11-21 00:17:11,548 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-21 00:17:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 280 treesize of output 283 [2021-11-21 00:17:12,276 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:17:12,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 317 [2021-11-21 00:17:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:12,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:17:12,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 299 [2021-11-21 00:17:12,334 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 00:17:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 305 [2021-11-21 00:17:13,172 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-21 00:17:13,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 259 [2021-11-21 00:17:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:13,219 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:17:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 261 treesize of output 262 [2021-11-21 00:17:13,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:13,269 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-21 00:17:13,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 259 treesize of output 260 [2021-11-21 00:17:14,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:14,444 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-21 00:17:14,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 267 treesize of output 260 [2021-11-21 00:17:14,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,482 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-21 00:17:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-21 00:17:14,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:14,516 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 00:17:14,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 279 [2021-11-21 00:17:15,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:17:15,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:17:15,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:17:16,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:17:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:17:16,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:17:18,252 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:17:18,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 137 [2021-11-21 00:17:18,285 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:17:18,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2021-11-21 00:17:18,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:17:25,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:17:25,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:17:26,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-21 00:17:28,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:17:28,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-21 00:17:28,211 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:17:35,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:17:35,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:17:35,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15, 17] total 54 [2021-11-21 00:17:35,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045796204] [2021-11-21 00:17:35,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:17:35,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-21 00:17:35,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:17:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-21 00:17:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4844, Unknown=28, NotChecked=572, Total=5700 [2021-11-21 00:17:35,201 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 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) [2021-11-21 00:17:38,366 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse2 (select .cse8 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (.cse0 (select .cse8 4))) (let ((.cse1 (= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse3 (store |c_ULTIMATE.start_main_old_#valid#1| .cse2 1))) (and (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base| 0) |c_ULTIMATE.start_sll_create_~head~0#1.base| 0)) (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (or (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) .cse0 0) |c_ULTIMATE.start_main_old_#valid#1|) (= .cse0 0) .cse1) (or (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not .cse1)) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse2) 0) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base|) 0) (forall ((v_DerPreprocessor_24 Int) (v_DerPreprocessor_23 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_176| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_174| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_176|) (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse7 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (select (let ((.cse6 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_176| v_DerPreprocessor_24))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse6)) (.cse5 (select .cse6 .cse7))) (store .cse4 .cse5 (store (select .cse4 .cse5) |v_ULTIMATE.start_sll_update_at_~head#1.offset_174| v_DerPreprocessor_23)))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse7)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) (= (store .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base| 1) |c_#valid|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (or (= |c_ULTIMATE.start_sll_create_~head~0#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| 0) |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|)) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| 0)))))) is different from false [2021-11-21 00:17:40,370 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse8 4)) (.cse2 (select .cse8 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (let ((.cse3 (store |c_ULTIMATE.start_main_old_#valid#1| .cse2 1)) (.cse1 (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0))) (and (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) .cse0 0) |c_ULTIMATE.start_main_old_#valid#1|) .cse1 (= 0 .cse0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse2) 0) (= (select .cse3 |c_ULTIMATE.start_main_~s~0#1.base|) 0) (= (store .cse3 |c_ULTIMATE.start_main_~s~0#1.base| 1) |c_#valid|) (forall ((v_DerPreprocessor_24 Int) (v_DerPreprocessor_23 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_176| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_174| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_176|) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse7 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse6 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_176| v_DerPreprocessor_24))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse6)) (.cse5 (select .cse6 .cse7))) (store .cse4 .cse5 (store (select .cse4 .cse5) |v_ULTIMATE.start_sll_update_at_~head#1.offset_174| v_DerPreprocessor_23)))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse7)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) (or (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (not .cse1)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))))) is different from false [2021-11-21 00:17:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:17:42,133 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-11-21 00:17:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:17:42,133 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 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 44 [2021-11-21 00:17:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:17:42,134 INFO L225 Difference]: With dead ends: 91 [2021-11-21 00:17:42,134 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 00:17:42,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 69.8s TimeCoverageRelationStatistics Valid=438, Invalid=6866, Unknown=30, NotChecked=1038, Total=8372 [2021-11-21 00:17:42,136 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:17:42,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 242 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 858 Invalid, 0 Unknown, 342 Unchecked, 1.0s Time] [2021-11-21 00:17:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 00:17:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-11-21 00:17:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 87 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) [2021-11-21 00:17:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-11-21 00:17:42,140 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 44 [2021-11-21 00:17:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:17:42,140 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-11-21 00:17:42,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 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) [2021-11-21 00:17:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-11-21 00:17:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:17:42,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:17:42,141 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:17:42,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-21 00:17:42,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:17:42,344 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-21 00:17:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:17:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1621218678, now seen corresponding path program 2 times [2021-11-21 00:17:42,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:17:42,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030263419] [2021-11-21 00:17:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:17:42,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:17:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:17:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:17:43,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:17:43,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030263419] [2021-11-21 00:17:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030263419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:17:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051324141] [2021-11-21 00:17:43,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:17:43,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:17:43,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:17:43,308 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:17:43,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e0f6e02-8a5a-470b-9f8e-896ed1c4d557/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 00:17:43,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:17:43,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:17:43,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-21 00:17:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:17:43,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:17:43,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:17:43,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:17:43,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:17:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 00:17:43,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 00:17:43,840 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:17:43,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 54 [2021-11-21 00:17:43,858 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:17:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 00:17:44,001 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-21 00:17:44,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 72 [2021-11-21 00:17:44,031 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-21 00:17:44,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 81 [2021-11-21 00:17:44,319 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-21 00:17:44,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 61 [2021-11-21 00:17:44,343 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-21 00:17:44,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 55 [2021-11-21 00:17:44,610 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-21 00:17:44,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 78 [2021-11-21 00:17:44,636 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-11-21 00:17:44,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 55 [2021-11-21 00:17:45,170 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-21 00:17:45,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 47 [2021-11-21 00:17:45,187 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-21 00:17:45,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 30 [2021-11-21 00:17:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:17:45,254 INFO L328 TraceCheckSpWp]: Computing backward predicates...