./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/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_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:22:53,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:22:53,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:22:53,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:22:53,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:22:53,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:22:53,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:22:53,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:22:53,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:22:53,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:22:53,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:22:53,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:22:53,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:22:53,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:22:53,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:22:53,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:22:53,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:22:53,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:22:53,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:22:53,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:22:53,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:22:53,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:22:53,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:22:53,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:22:53,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:22:53,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:22:53,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:22:53,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:22:53,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:22:53,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:22:53,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:22:53,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:22:53,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:22:53,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:22:53,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:22:53,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:22:53,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:22:53,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:22:53,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:22:53,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:22:53,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:22:53,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:22:53,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:22:53,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:22:53,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:22:53,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:22:53,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:22:53,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:22:53,761 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:22:53,761 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:22:53,761 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:22:53,761 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:22:53,762 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:22:53,763 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:22:53,763 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:22:53,763 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:22:53,763 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:22:53,764 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:22:53,764 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:22:53,764 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:22:53,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:22:53,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:22:53,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:22:53,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:22:53,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:22:53,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:22:53,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:22:53,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:22:53,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:22:53,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:22:53,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:22:53,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:22:53,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:22:53,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:22:53,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:22:53,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:22:53,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:22:53,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:22:53,778 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:22:53,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:22:53,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:22:53,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:22:53,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:22:53,779 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_6a7759f6-199d-4652-bb62-e41b05c58f5c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 [2021-11-21 00:22:54,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:22:54,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:22:54,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:22:54,082 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:22:54,082 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:22:54,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-11-21 00:22:54,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/data/412545ebd/47c0f1eaa124437aaef12c1511355749/FLAG665853dda [2021-11-21 00:22:54,704 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:22:54,704 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-11-21 00:22:54,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/data/412545ebd/47c0f1eaa124437aaef12c1511355749/FLAG665853dda [2021-11-21 00:22:55,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/data/412545ebd/47c0f1eaa124437aaef12c1511355749 [2021-11-21 00:22:55,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:22:55,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:22:55,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:22:55,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:22:55,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:22:55,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79dc7f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55, skipping insertion in model container [2021-11-21 00:22:55,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:22:55,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:22:55,443 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_6a7759f6-199d-4652-bb62-e41b05c58f5c/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-11-21 00:22:55,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:22:55,457 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:22:55,505 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_6a7759f6-199d-4652-bb62-e41b05c58f5c/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-11-21 00:22:55,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:22:55,535 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:22:55,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55 WrapperNode [2021-11-21 00:22:55,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:22:55,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:22:55,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:22:55,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:22:55,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,578 INFO L137 Inliner]: procedures = 126, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-21 00:22:55,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:22:55,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:22:55,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:22:55,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:22:55,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:22:55,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:22:55,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:22:55,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:22:55,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (1/1) ... [2021-11-21 00:22:55,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:22:55,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:22:55,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:22:55,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:22:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-21 00:22:55,692 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-21 00:22:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:22:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:22:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:22:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:22:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:22:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:22:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:22:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:22:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:22:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:22:55,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:22:55,822 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:22:55,824 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:22:55,871 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-21 00:22:56,058 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:22:56,108 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:22:56,109 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:22:56,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:22:56 BoogieIcfgContainer [2021-11-21 00:22:56,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:22:56,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:22:56,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:22:56,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:22:56,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:22:55" (1/3) ... [2021-11-21 00:22:56,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8a26dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:22:56, skipping insertion in model container [2021-11-21 00:22:56,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:22:55" (2/3) ... [2021-11-21 00:22:56,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8a26dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:22:56, skipping insertion in model container [2021-11-21 00:22:56,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:22:56" (3/3) ... [2021-11-21 00:22:56,120 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2021-11-21 00:22:56,125 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:22:56,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:22:56,200 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:22:56,207 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 00:22:56,207 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:22:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:22:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:22:56,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:22:56,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:22:56,227 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:22:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:22:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 100507244, now seen corresponding path program 1 times [2021-11-21 00:22:56,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:22:56,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143853791] [2021-11-21 00:22:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:22:56,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:22:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:22:56,478 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 00:22:56,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:22:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143853791] [2021-11-21 00:22:56,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143853791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:22:56,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:22:56,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:22:56,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766867288] [2021-11-21 00:22:56,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:22:56,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:22:56,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:22:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:22:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:22:56,518 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 00:22:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:22:56,578 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-21 00:22:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:22:56,580 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 00:22:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:22:56,587 INFO L225 Difference]: With dead ends: 23 [2021-11-21 00:22:56,587 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 00:22:56,590 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 00:22:56,594 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:22:56,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:22:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 00:22:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2021-11-21 00:22:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) 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 00:22:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-21 00:22:56,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2021-11-21 00:22:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:22:56,629 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-21 00:22:56,629 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 00:22:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-21 00:22:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:22:56,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:22:56,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:22:56,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:22:56,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:22:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:22:56,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2083183978, now seen corresponding path program 1 times [2021-11-21 00:22:56,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:22:56,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521386310] [2021-11-21 00:22:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:22:56,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:22:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:22:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:22:56,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:22:56,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521386310] [2021-11-21 00:22:56,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521386310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:22:56,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:22:56,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:22:56,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929590829] [2021-11-21 00:22:56,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:22:56,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:22:56,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:22:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:22:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:22:56,707 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:22:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:22:56,751 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-21 00:22:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:22:56,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:22:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:22:56,753 INFO L225 Difference]: With dead ends: 13 [2021-11-21 00:22:56,753 INFO L226 Difference]: Without dead ends: 10 [2021-11-21 00:22:56,753 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 00:22:56,755 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:22:56,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:22:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-21 00:22:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-21 00:22:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 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 00:22:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-21 00:22:56,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-11-21 00:22:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:22:56,761 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-21 00:22:56,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:22:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-21 00:22:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:22:56,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:22:56,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:22:56,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:22:56,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:22:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:22:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash 154153459, now seen corresponding path program 1 times [2021-11-21 00:22:56,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:22:56,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458170599] [2021-11-21 00:22:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:22:56,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:22:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:22:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:22:56,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:22:56,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458170599] [2021-11-21 00:22:56,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458170599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:22:56,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76672271] [2021-11-21 00:22:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:22:56,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:22:56,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:22:56,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:22:56,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:22:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:22:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:22:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:22:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:22:57,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:22:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:22:57,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76672271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:22:57,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242405938] [2021-11-21 00:22:57,181 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:22:57,195 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:22:57,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:22:57,205 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:22:57,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:22:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,339 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:22:57,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:22:57,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:22:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,521 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:22:57,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:22:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:22:57,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,808 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 56 treesize of output 47 [2021-11-21 00:22:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,822 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:22:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:22:57,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:22:58,219 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-21 00:22:58,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 262 treesize of output 286 [2021-11-21 00:22:58,302 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-21 00:22:58,303 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 279 treesize of output 288 [2021-11-21 00:22:59,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:59,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,029 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 00:23:00,030 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 4 case distinctions, treesize of input 418 treesize of output 404 [2021-11-21 00:23:00,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,060 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:23:00,061 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 403 treesize of output 388 [2021-11-21 00:23:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:23:00,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 375 [2021-11-21 00:23:00,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:23:00,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 369 treesize of output 360 [2021-11-21 00:23:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:00,230 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 00:23:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 354 treesize of output 357 [2021-11-21 00:23:00,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:00,333 INFO L354 Elim1Store]: treesize reduction 301, result has 16.2 percent of original size [2021-11-21 00:23:00,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 472 treesize of output 475 [2021-11-21 00:23:00,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:00,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 00:23:00,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:23:01,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:01,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:01,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 29 [2021-11-21 00:23:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:01,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:01,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:01,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:01,840 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:23:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 104 [2021-11-21 00:23:02,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 29 [2021-11-21 00:23:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 68 [2021-11-21 00:23:03,357 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 00:23:03,399 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 00:23:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,726 INFO L354 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2021-11-21 00:23:03,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 233 [2021-11-21 00:23:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,798 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 00:23:03,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 264 [2021-11-21 00:23:03,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 291 [2021-11-21 00:23:03,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,882 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 291 treesize of output 275 [2021-11-21 00:23:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 00:23:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 00:23:04,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 00:23:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:04,440 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:23:04,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 33 [2021-11-21 00:23:04,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:04,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 56 [2021-11-21 00:23:04,800 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 168 treesize of output 167 [2021-11-21 00:23:04,888 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 1 [2021-11-21 00:23:04,933 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 00:23:04,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:05,014 INFO L354 Elim1Store]: treesize reduction 50, result has 47.4 percent of original size [2021-11-21 00:23:05,015 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 55 treesize of output 76 [2021-11-21 00:23:05,344 INFO L354 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2021-11-21 00:23:05,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 64 [2021-11-21 00:23:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:05,634 INFO L354 Elim1Store]: treesize reduction 138, result has 18.3 percent of original size [2021-11-21 00:23:05,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 151 treesize of output 153 [2021-11-21 00:23:05,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:05,846 INFO L354 Elim1Store]: treesize reduction 60, result has 36.2 percent of original size [2021-11-21 00:23:05,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 160 [2021-11-21 00:23:06,692 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 154 treesize of output 153 [2021-11-21 00:23:06,736 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 19 treesize of output 1 [2021-11-21 00:23:06,808 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 00:23:06,935 INFO L354 Elim1Store]: treesize reduction 68, result has 39.8 percent of original size [2021-11-21 00:23:06,935 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 61 treesize of output 86 [2021-11-21 00:23:07,017 INFO L354 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2021-11-21 00:23:07,017 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 80 treesize of output 109 [2021-11-21 00:23:10,693 INFO L354 Elim1Store]: treesize reduction 128, result has 42.3 percent of original size [2021-11-21 00:23:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 170 treesize of output 230 [2021-11-21 00:23:15,895 INFO L354 Elim1Store]: treesize reduction 120, result has 38.1 percent of original size [2021-11-21 00:23:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 262 [2021-11-21 00:23:26,790 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 00:23:26,827 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 00:23:26,989 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:23:27,223 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:23:27,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:23:27,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-21 00:23:27,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116686431] [2021-11-21 00:23:27,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:23:27,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:23:27,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:23:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:23:27,225 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:27,267 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-21 00:23:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:23:27,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 00:23:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:27,269 INFO L225 Difference]: With dead ends: 18 [2021-11-21 00:23:27,269 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:23:27,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:23:27,271 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:27,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:23:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:23:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 00:23:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 00:23:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-21 00:23:27,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-21 00:23:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:27,276 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-21 00:23:27,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-21 00:23:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:23:27,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:27,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:23:27,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:23:27,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:27,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 411681265, now seen corresponding path program 2 times [2021-11-21 00:23:27,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:27,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260724360] [2021-11-21 00:23:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:27,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:23:27,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260724360] [2021-11-21 00:23:27,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260724360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:23:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592565059] [2021-11-21 00:23:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:23:27,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:27,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:27,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:27,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:23:27,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:23:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:23:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:23:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:23:27,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:23:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:23:27,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592565059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:23:27,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733150517] [2021-11-21 00:23:27,761 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:23:27,761 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:23:27,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:23:27,762 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:23:27,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:23:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:27,831 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:23:27,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:23:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:27,872 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 00:23:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,056 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:23:28,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 00:23:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 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 00:23:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:23:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 00:23:28,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,346 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:23:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:23:28,612 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-21 00:23:28,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 262 treesize of output 286 [2021-11-21 00:23:28,675 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-21 00:23:28,675 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 279 treesize of output 288 [2021-11-21 00:23:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:29,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,134 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-11-21 00:23:30,134 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 4 case distinctions, treesize of input 426 treesize of output 412 [2021-11-21 00:23:30,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,252 INFO L354 Elim1Store]: treesize reduction 79, result has 8.1 percent of original size [2021-11-21 00:23:30,252 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 6 case distinctions, treesize of input 411 treesize of output 396 [2021-11-21 00:23:30,363 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-21 00:23:30,364 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 392 treesize of output 383 [2021-11-21 00:23:30,423 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-21 00:23:30,424 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 377 treesize of output 368 [2021-11-21 00:23:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,529 INFO L354 Elim1Store]: treesize reduction 353, result has 11.5 percent of original size [2021-11-21 00:23:30,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 362 treesize of output 367 [2021-11-21 00:23:30,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,639 INFO L354 Elim1Store]: treesize reduction 509, result has 11.2 percent of original size [2021-11-21 00:23:30,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 484 treesize of output 489 [2021-11-21 00:23:30,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:23:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 40 [2021-11-21 00:23:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 53 [2021-11-21 00:23:31,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:31,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2021-11-21 00:23:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:32,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:32,513 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:23:32,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 79 [2021-11-21 00:23:32,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:32,731 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:23:32,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 47 [2021-11-21 00:23:33,166 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 00:23:33,180 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 00:23:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,470 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-21 00:23:33,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 229 [2021-11-21 00:23:33,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,540 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-11-21 00:23:33,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 264 [2021-11-21 00:23:33,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 291 [2021-11-21 00:23:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,623 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 291 treesize of output 275 [2021-11-21 00:23:33,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,681 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 57 treesize of output 11 [2021-11-21 00:23:33,744 WARN L220 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:23:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:33,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 00:23:34,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 54 [2021-11-21 00:23:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 53 [2021-11-21 00:23:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 00:23:34,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 35 [2021-11-21 00:23:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 56 [2021-11-21 00:23:34,757 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 168 treesize of output 167 [2021-11-21 00:23:34,814 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 1 [2021-11-21 00:23:34,896 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 00:23:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,994 INFO L354 Elim1Store]: treesize reduction 50, result has 47.4 percent of original size [2021-11-21 00:23:34,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 76 [2021-11-21 00:23:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:35,492 INFO L354 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2021-11-21 00:23:35,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 200 [2021-11-21 00:23:35,976 INFO L354 Elim1Store]: treesize reduction 104, result has 29.7 percent of original size [2021-11-21 00:23:35,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 190 treesize of output 180 [2021-11-21 00:23:36,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:36,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:23:36,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 7 [2021-11-21 00:23:36,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:36,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:23:36,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 16 [2021-11-21 00:23:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:36,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:23:36,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 26 [2021-11-21 00:23:37,011 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 154 treesize of output 153 [2021-11-21 00:23:37,085 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 1 [2021-11-21 00:23:37,119 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 00:23:37,237 INFO L354 Elim1Store]: treesize reduction 68, result has 39.8 percent of original size [2021-11-21 00:23:37,237 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 61 treesize of output 86 [2021-11-21 00:23:37,312 INFO L354 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2021-11-21 00:23:37,312 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 80 treesize of output 109 [2021-11-21 00:23:39,579 INFO L354 Elim1Store]: treesize reduction 120, result has 42.3 percent of original size [2021-11-21 00:23:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 168 treesize of output 224 [2021-11-21 00:23:43,097 INFO L354 Elim1Store]: treesize reduction 100, result has 44.4 percent of original size [2021-11-21 00:23:43,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 179 treesize of output 201 [2021-11-21 00:23:48,489 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 00:23:48,556 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 00:23:48,636 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:23:48,866 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:23:48,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:23:48,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-21 00:23:48,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551888312] [2021-11-21 00:23:48,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:23:48,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:23:48,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:23:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:23:48,868 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 00:23:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:48,909 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-21 00:23:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:23:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:23:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:48,910 INFO L225 Difference]: With dead ends: 17 [2021-11-21 00:23:48,910 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:23:48,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:23:48,911 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:48,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:23:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:23:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 00:23:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 00:23:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-21 00:23:48,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-11-21 00:23:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:48,916 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-21 00:23:48,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 00:23:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-21 00:23:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:23:48,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:48,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:23:48,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:49,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:49,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash -122823092, now seen corresponding path program 3 times [2021-11-21 00:23:49,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:49,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998527435] [2021-11-21 00:23:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:49,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:23:49,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:49,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998527435] [2021-11-21 00:23:49,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998527435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:23:49,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156423094] [2021-11-21 00:23:49,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:23:49,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:49,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:49,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a7759f6-199d-4652-bb62-e41b05c58f5c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:23:50,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:23:50,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:23:50,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-21 00:23:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:50,329 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 00:23:50,371 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:23:50,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2021-11-21 00:23:50,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-21 00:23:50,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-21 00:23:50,518 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-21 00:23:50,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:23:50,668 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-21 00:23:50,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 143 treesize of output 131 [2021-11-21 00:23:50,694 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-21 00:23:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 109 treesize of output 97 [2021-11-21 00:23:50,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 90 [2021-11-21 00:23:50,946 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 89 treesize of output 1 [2021-11-21 00:23:50,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:51,055 INFO L354 Elim1Store]: treesize reduction 267, result has 15.2 percent of original size [2021-11-21 00:23:51,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 318 treesize of output 174 [2021-11-21 00:23:51,116 INFO L354 Elim1Store]: treesize reduction 127, result has 18.6 percent of original size [2021-11-21 00:23:51,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 242 treesize of output 117 [2021-11-21 00:23:51,269 INFO L354 Elim1Store]: treesize reduction 157, result has 4.8 percent of original size [2021-11-21 00:23:51,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 112 [2021-11-21 00:23:51,295 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-11-21 00:23:51,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 67 [2021-11-21 00:23:51,299 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 00:23:51,301 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 19 treesize of output 15 [2021-11-21 00:23:51,338 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 29 treesize of output 21 [2021-11-21 00:23:51,340 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 10 [2021-11-21 00:23:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:23:51,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:24:00,167 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 108 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:24:25,102 WARN L227 SmtUtils]: Spent 21.19s on a formula simplification. DAG size of input: 56 DAG size of output: 41 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:24:25,103 INFO L354 Elim1Store]: treesize reduction 114, result has 39.0 percent of original size [2021-11-21 00:24:25,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 3102 treesize of output 3119 [2021-11-21 00:24:37,547 WARN L227 SmtUtils]: Spent 12.42s on a formula simplification. DAG size of input: 56 DAG size of output: 37 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:24:37,547 INFO L354 Elim1Store]: treesize reduction 126, result has 32.6 percent of original size [2021-11-21 00:24:37,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 3119 treesize of output 3124 [2021-11-21 00:24:38,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-21 00:24:38,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-21 00:24:38,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-21 00:24:38,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,357 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-11-21 00:24:38,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 00:24:39,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:39,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-21 00:24:39,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:39,230 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-21 00:24:39,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 13