./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-sorted-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-sorted-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 618946a6e113450d0f3efa55a455801e1c2225c3ba6f88e87a9e8ad02019b85f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:18:54,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:18:54,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:18:54,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:18:54,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:18:54,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:18:54,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:18:54,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:18:54,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:18:54,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:18:54,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:18:54,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:18:54,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:18:54,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:18:54,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:18:54,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:18:54,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:18:54,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:18:54,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:18:54,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:18:54,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:18:54,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:18:54,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:18:54,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:18:54,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:18:54,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:18:54,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:18:54,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:18:54,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:18:54,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:18:54,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:18:54,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:18:54,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:18:54,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:18:54,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:18:54,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:18:54,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:18:54,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:18:54,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:18:54,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:18:54,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:18:54,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:18:54,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:18:54,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:18:54,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:18:54,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:18:54,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:18:54,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:18:54,624 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:18:54,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:18:54,625 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:18:54,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:18:54,626 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:18:54,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:18:54,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:18:54,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:18:54,627 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:18:54,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:18:54,628 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:18:54,628 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:18:54,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:18:54,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:18:54,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:18:54,630 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:18:54,630 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:18:54,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:18:54,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:18:54,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:18:54,631 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:18:54,631 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:18:54,631 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:18:54,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:18:54,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:18:54,632 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:18:54,632 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:18:54,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:18:54,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:18:54,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:54,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:18:54,634 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:18:54,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:18:54,634 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:18:54,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:18:54,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:18:54,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 618946a6e113450d0f3efa55a455801e1c2225c3ba6f88e87a9e8ad02019b85f [2022-11-26 00:18:54,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:18:55,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:18:55,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:18:55,029 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:18:55,029 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:18:55,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/forester-heap/sll-sorted-2.i [2022-11-26 00:18:58,832 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:18:59,184 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:18:59,187 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i [2022-11-26 00:18:59,209 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/data/e5029060c/33f8fa63c6594257b8ab5445911d2fb4/FLAGb7d46c610 [2022-11-26 00:18:59,230 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/data/e5029060c/33f8fa63c6594257b8ab5445911d2fb4 [2022-11-26 00:18:59,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:18:59,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:18:59,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:59,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:18:59,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:18:59,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cad8fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59, skipping insertion in model container [2022-11-26 00:18:59,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:18:59,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:18:59,629 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2022-11-26 00:18:59,636 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2022-11-26 00:18:59,639 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2022-11-26 00:18:59,643 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2022-11-26 00:18:59,645 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2022-11-26 00:18:59,647 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2022-11-26 00:18:59,648 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2022-11-26 00:18:59,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:59,665 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:18:59,710 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2022-11-26 00:18:59,712 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2022-11-26 00:18:59,714 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2022-11-26 00:18:59,718 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2022-11-26 00:18:59,719 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2022-11-26 00:18:59,721 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2022-11-26 00:18:59,722 WARN L237 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_896b3cc8-aa95-4e88-801f-b60c54699606/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2022-11-26 00:18:59,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:59,768 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:18:59,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59 WrapperNode [2022-11-26 00:18:59,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:59,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:59,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:18:59,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:18:59,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,828 INFO L138 Inliner]: procedures = 119, calls = 40, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 199 [2022-11-26 00:18:59,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:59,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:18:59,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:18:59,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:18:59,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,896 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:18:59,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:18:59,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:18:59,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:18:59,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (1/1) ... [2022-11-26 00:18:59,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:59,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:18:59,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:19:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:19:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:19:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:19:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:19:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:19:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:19:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:19:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:19:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:19:00,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:19:00,162 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:19:00,164 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:19:00,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:19:01,057 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:19:01,057 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-26 00:19:01,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:19:01 BoogieIcfgContainer [2022-11-26 00:19:01,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:19:01,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:19:01,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:19:01,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:19:01,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:18:59" (1/3) ... [2022-11-26 00:19:01,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5284e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:19:01, skipping insertion in model container [2022-11-26 00:19:01,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:59" (2/3) ... [2022-11-26 00:19:01,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5284e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:19:01, skipping insertion in model container [2022-11-26 00:19:01,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:19:01" (3/3) ... [2022-11-26 00:19:01,073 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-sorted-2.i [2022-11-26 00:19:01,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:19:01,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 71 error locations. [2022-11-26 00:19:01,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:19:01,167 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f826253, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:19:01,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-26 00:19:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 72 states have (on average 2.4722222222222223) internal successors, (178), 143 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:19:01,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:01,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:19:01,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:01,190 INFO L85 PathProgramCache]: Analyzing trace with hash 12218, now seen corresponding path program 1 times [2022-11-26 00:19:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:01,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417582993] [2022-11-26 00:19:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:01,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:01,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:01,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417582993] [2022-11-26 00:19:01,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417582993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:01,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:01,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:19:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421459540] [2022-11-26 00:19:01,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:01,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:01,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:01,557 INFO L87 Difference]: Start difference. First operand has 144 states, 72 states have (on average 2.4722222222222223) internal successors, (178), 143 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:01,818 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2022-11-26 00:19:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-26 00:19:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:01,847 INFO L225 Difference]: With dead ends: 146 [2022-11-26 00:19:01,847 INFO L226 Difference]: Without dead ends: 144 [2022-11-26 00:19:01,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:01,856 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 138 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:01,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 86 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-26 00:19:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-11-26 00:19:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 140 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2022-11-26 00:19:01,922 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 2 [2022-11-26 00:19:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:01,923 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2022-11-26 00:19:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2022-11-26 00:19:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:19:01,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:01,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:19:01,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:19:01,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash 12219, now seen corresponding path program 1 times [2022-11-26 00:19:01,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:01,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991203338] [2022-11-26 00:19:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:02,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991203338] [2022-11-26 00:19:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991203338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:02,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:02,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:19:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317213335] [2022-11-26 00:19:02,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:02,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:02,054 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:02,236 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2022-11-26 00:19:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:02,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-26 00:19:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:02,248 INFO L225 Difference]: With dead ends: 142 [2022-11-26 00:19:02,249 INFO L226 Difference]: Without dead ends: 142 [2022-11-26 00:19:02,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:02,251 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 135 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:02,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 86 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-26 00:19:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-11-26 00:19:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 138 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2022-11-26 00:19:02,277 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 2 [2022-11-26 00:19:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:02,278 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2022-11-26 00:19:02,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2022-11-26 00:19:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:19:02,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:02,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:19:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:19:02,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1591596380, now seen corresponding path program 1 times [2022-11-26 00:19:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:02,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270931299] [2022-11-26 00:19:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:02,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:02,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270931299] [2022-11-26 00:19:02,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270931299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:02,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:02,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:02,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214478355] [2022-11-26 00:19:02,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:02,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:02,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:19:02,615 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:02,893 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2022-11-26 00:19:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:19:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:19:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:02,897 INFO L225 Difference]: With dead ends: 144 [2022-11-26 00:19:02,897 INFO L226 Difference]: Without dead ends: 144 [2022-11-26 00:19:02,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:02,903 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 237 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:02,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 62 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-26 00:19:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2022-11-26 00:19:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 85 states have (on average 1.8235294117647058) internal successors, (155), 134 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2022-11-26 00:19:02,927 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 6 [2022-11-26 00:19:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:02,927 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2022-11-26 00:19:02,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2022-11-26 00:19:02,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:19:02,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:02,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:19:02,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:19:02,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1591596379, now seen corresponding path program 1 times [2022-11-26 00:19:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:02,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880348564] [2022-11-26 00:19:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:03,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:03,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880348564] [2022-11-26 00:19:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880348564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:03,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:03,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:03,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681928869] [2022-11-26 00:19:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:03,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:03,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:03,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:03,268 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:03,521 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2022-11-26 00:19:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:19:03,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:19:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:03,524 INFO L225 Difference]: With dead ends: 142 [2022-11-26 00:19:03,524 INFO L226 Difference]: Without dead ends: 142 [2022-11-26 00:19:03,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:03,531 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 132 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:03,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 135 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-26 00:19:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-11-26 00:19:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.797752808988764) internal successors, (160), 138 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 160 transitions. [2022-11-26 00:19:03,551 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 160 transitions. Word has length 6 [2022-11-26 00:19:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:03,552 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 160 transitions. [2022-11-26 00:19:03,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 160 transitions. [2022-11-26 00:19:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:19:03,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:03,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:19:03,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -515790745, now seen corresponding path program 1 times [2022-11-26 00:19:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194146586] [2022-11-26 00:19:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:03,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:03,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:03,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194146586] [2022-11-26 00:19:03,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194146586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:03,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:03,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:03,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286447811] [2022-11-26 00:19:03,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:03,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:03,630 INFO L87 Difference]: Start difference. First operand 139 states and 160 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-26 00:19:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:03,699 INFO L93 Difference]: Finished difference Result 169 states and 194 transitions. [2022-11-26 00:19:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 [2022-11-26 00:19:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:03,701 INFO L225 Difference]: With dead ends: 169 [2022-11-26 00:19:03,702 INFO L226 Difference]: Without dead ends: 169 [2022-11-26 00:19:03,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:03,703 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 91 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:03,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 156 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-26 00:19:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 141. [2022-11-26 00:19:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 91 states have (on average 1.7692307692307692) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2022-11-26 00:19:03,721 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 8 [2022-11-26 00:19:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:03,722 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2022-11-26 00:19:03,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-26 00:19:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2022-11-26 00:19:03,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:19:03,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:03,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:03,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:19:03,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash -515426526, now seen corresponding path program 1 times [2022-11-26 00:19:03,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:03,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099864359] [2022-11-26 00:19:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:03,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:03,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099864359] [2022-11-26 00:19:03,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099864359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:03,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:03,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:03,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464712355] [2022-11-26 00:19:03,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:03,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:19:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:19:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:03,933 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-26 00:19:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:04,222 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2022-11-26 00:19:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:19:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2022-11-26 00:19:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:04,223 INFO L225 Difference]: With dead ends: 146 [2022-11-26 00:19:04,223 INFO L226 Difference]: Without dead ends: 146 [2022-11-26 00:19:04,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:04,227 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 86 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:04,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 207 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:19:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-26 00:19:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-11-26 00:19:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 91 states have (on average 1.7582417582417582) internal successors, (160), 139 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2022-11-26 00:19:04,239 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 8 [2022-11-26 00:19:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:04,240 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2022-11-26 00:19:04,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-26 00:19:04,241 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2022-11-26 00:19:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:19:04,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:04,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:04,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:19:04,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash -515426525, now seen corresponding path program 1 times [2022-11-26 00:19:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:04,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455814763] [2022-11-26 00:19:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:04,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:04,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:04,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455814763] [2022-11-26 00:19:04,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455814763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:04,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:04,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:04,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954503281] [2022-11-26 00:19:04,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:19:04,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:04,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:19:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:04,475 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-26 00:19:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:04,748 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2022-11-26 00:19:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:19:04,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2022-11-26 00:19:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:04,750 INFO L225 Difference]: With dead ends: 135 [2022-11-26 00:19:04,750 INFO L226 Difference]: Without dead ends: 135 [2022-11-26 00:19:04,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:04,751 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 8 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:04,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 279 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-26 00:19:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-11-26 00:19:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.735632183908046) internal successors, (151), 130 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:04,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2022-11-26 00:19:04,757 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 8 [2022-11-26 00:19:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:04,757 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2022-11-26 00:19:04,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-26 00:19:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2022-11-26 00:19:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:19:04,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:04,758 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:04,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:19:04,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:04,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash -971190285, now seen corresponding path program 1 times [2022-11-26 00:19:04,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:04,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010802600] [2022-11-26 00:19:04,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:04,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:19:04,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010802600] [2022-11-26 00:19:04,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010802600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:04,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:04,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:04,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171325973] [2022-11-26 00:19:04,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:04,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:04,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:19:04,839 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2022-11-26 00:19:05,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:05,060 INFO L93 Difference]: Finished difference Result 211 states and 230 transitions. [2022-11-26 00:19:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:19:05,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:19:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:05,062 INFO L225 Difference]: With dead ends: 211 [2022-11-26 00:19:05,062 INFO L226 Difference]: Without dead ends: 211 [2022-11-26 00:19:05,063 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:19:05,064 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 276 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:05,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 129 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-26 00:19:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 131. [2022-11-26 00:19:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 88 states have (on average 1.7159090909090908) internal successors, (151), 130 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2022-11-26 00:19:05,069 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 15 [2022-11-26 00:19:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:05,070 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2022-11-26 00:19:05,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2022-11-26 00:19:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2022-11-26 00:19:05,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:19:05,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:05,071 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:05,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:19:05,072 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1305832451, now seen corresponding path program 1 times [2022-11-26 00:19:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:05,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294305575] [2022-11-26 00:19:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:05,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:05,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294305575] [2022-11-26 00:19:05,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294305575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022884639] [2022-11-26 00:19:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:05,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:05,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:19:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:19:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:05,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:05,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:05,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 00:19:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:05,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022884639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1864437086] [2022-11-26 00:19:05,891 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 00:19:05,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:05,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:05,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:05,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:05,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:05,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:05,978 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:06,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:19:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,033 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 21 [2022-11-26 00:19:06,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:19:06,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,098 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 30 [2022-11-26 00:19:06,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,124 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:19:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,144 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:19:06,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 00:19:06,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:19:06,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:19:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:19:06,409 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:19:06,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:19:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:19:06,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:06,473 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:19:06,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-26 00:19:06,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,532 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:19:06,532 INFO L350 Elim1Store]: Elim1 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 83 treesize of output 50 [2022-11-26 00:19:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 00:19:06,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,583 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 24 [2022-11-26 00:19:06,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-26 00:19:06,753 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:19:06,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 93 [2022-11-26 00:19:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2022-11-26 00:19:06,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:19:06,972 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-26 00:19:06,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-26 00:19:06,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:06,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-26 00:19:07,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-26 00:19:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:07,211 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-26 00:19:07,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 447 treesize of output 368 [2022-11-26 00:19:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:07,296 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-26 00:19:07,297 INFO L350 Elim1Store]: Elim1 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 7 case distinctions, treesize of input 441 treesize of output 443 [2022-11-26 00:19:07,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:07,345 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-26 00:19:07,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 409 [2022-11-26 00:19:07,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:07,862 INFO L321 Elim1Store]: treesize reduction 156, result has 13.8 percent of original size [2022-11-26 00:19:07,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 858 treesize of output 828 [2022-11-26 00:19:08,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:08,326 INFO L321 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2022-11-26 00:19:08,327 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 1010 treesize of output 831 [2022-11-26 00:19:08,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:08,435 INFO L321 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2022-11-26 00:19:08,436 INFO L350 Elim1Store]: Elim1 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 1010 treesize of output 952 [2022-11-26 00:19:08,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:08,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:08,630 INFO L321 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2022-11-26 00:19:08,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 1007 treesize of output 965 [2022-11-26 00:19:09,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:09,486 INFO L321 Elim1Store]: treesize reduction 184, result has 15.2 percent of original size [2022-11-26 00:19:09,486 INFO L350 Elim1Store]: Elim1 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 909 treesize of output 538 [2022-11-26 00:19:09,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:09,676 INFO L321 Elim1Store]: treesize reduction 196, result has 17.3 percent of original size [2022-11-26 00:19:09,676 INFO L350 Elim1Store]: Elim1 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 884 treesize of output 741 [2022-11-26 00:19:09,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:09,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:09,990 INFO L321 Elim1Store]: treesize reduction 560, result has 10.7 percent of original size [2022-11-26 00:19:09,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 797 treesize of output 772 [2022-11-26 00:19:10,877 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:10,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:19:10,894 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:10,926 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:19:10,927 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:10,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:19:10,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:19:10,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:19:10,983 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-26 00:19:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:19:11,060 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:19:11,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-26 00:19:11,073 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 21 [2022-11-26 00:19:11,134 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:11,139 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:11,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:19:11,280 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:19:11,280 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:11,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:19:11,431 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:19:11,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 216 [2022-11-26 00:19:11,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,553 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-26 00:19:11,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 217 treesize of output 240 [2022-11-26 00:19:11,607 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:19:11,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 206 [2022-11-26 00:19:12,264 INFO L321 Elim1Store]: treesize reduction 84, result has 35.4 percent of original size [2022-11-26 00:19:12,265 INFO L350 Elim1Store]: Elim1 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 6 case distinctions, treesize of input 377 treesize of output 346 [2022-11-26 00:19:12,443 INFO L321 Elim1Store]: treesize reduction 84, result has 35.4 percent of original size [2022-11-26 00:19:12,444 INFO L350 Elim1Store]: Elim1 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 6 case distinctions, treesize of input 329 treesize of output 346 [2022-11-26 00:19:12,676 INFO L321 Elim1Store]: treesize reduction 230, result has 19.0 percent of original size [2022-11-26 00:19:12,677 INFO L350 Elim1Store]: Elim1 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 5 new quantified variables, introduced 12 case distinctions, treesize of input 317 treesize of output 331 [2022-11-26 00:19:13,566 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:19:17,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2632#(and (not (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|))) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (exists ((|v_ULTIMATE.start_main_~x~0#1.offset_126| Int) (|v_ULTIMATE.start_main_~x~0#1.base_150| Int)) (and (= 1 (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_150|) (+ 4 |v_ULTIMATE.start_main_~x~0#1.offset_126|))) (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_126|) (= (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_150|) 1) (<= (+ 8 |v_ULTIMATE.start_main_~x~0#1.offset_126|) (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_150|)))) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:19:17,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:19:17,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:19:17,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-26 00:19:17,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313282845] [2022-11-26 00:19:17,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:17,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:19:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:17,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:19:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:19:17,586 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:18,008 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2022-11-26 00:19:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:19:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 00:19:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:18,010 INFO L225 Difference]: With dead ends: 193 [2022-11-26 00:19:18,010 INFO L226 Difference]: Without dead ends: 193 [2022-11-26 00:19:18,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:19:18,011 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 414 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:18,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 228 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:19:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-26 00:19:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 150. [2022-11-26 00:19:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 113 states have (on average 1.6283185840707965) internal successors, (184), 149 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-11-26 00:19:18,016 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 17 [2022-11-26 00:19:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:18,016 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-11-26 00:19:18,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-11-26 00:19:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:19:18,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:18,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:18,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:19:18,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:18,225 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:19:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1767732735, now seen corresponding path program 1 times [2022-11-26 00:19:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:18,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559284510] [2022-11-26 00:19:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:18,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559284510] [2022-11-26 00:19:18,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559284510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:18,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332082689] [2022-11-26 00:19:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:18,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:18,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:18,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:19:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:19,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:19:19,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:19,009 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:19,103 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:19:19,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 00:19:19,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:19:19,266 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:19:19,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-26 00:19:19,317 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:19:19,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-26 00:19:19,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:19,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:19:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:19,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:22,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:22,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-26 00:19:22,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:22,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-26 00:19:22,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-26 00:19:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:26,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332082689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:26,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714237071] [2022-11-26 00:19:26,763 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-26 00:19:26,763 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:26,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:26,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:26,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:26,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,797 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:26,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:19:26,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,828 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 21 [2022-11-26 00:19:26,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:19:26,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,863 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:19:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,875 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 30 [2022-11-26 00:19:26,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,890 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:19:26,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 00:19:26,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:19:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:26,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:19:26,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:19:27,081 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:19:27,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:19:27,117 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:19:27,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-26 00:19:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:19:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,213 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:19:27,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-26 00:19:27,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,241 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:19:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 00:19:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-26 00:19:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,381 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:19:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:19:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2022-11-26 00:19:27,548 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-26 00:19:27,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 149 [2022-11-26 00:19:27,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,644 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:19:27,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 156 [2022-11-26 00:19:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 53 [2022-11-26 00:19:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,832 INFO L321 Elim1Store]: treesize reduction 91, result has 10.8 percent of original size [2022-11-26 00:19:27,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 400 [2022-11-26 00:19:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,884 INFO L321 Elim1Store]: treesize reduction 91, result has 10.8 percent of original size [2022-11-26 00:19:27,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 480 [2022-11-26 00:19:27,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:27,976 INFO L321 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2022-11-26 00:19:27,976 INFO L350 Elim1Store]: Elim1 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 7 case distinctions, treesize of input 537 treesize of output 539 [2022-11-26 00:19:28,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:28,393 INFO L321 Elim1Store]: treesize reduction 310, result has 11.9 percent of original size [2022-11-26 00:19:28,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 1044 treesize of output 991 [2022-11-26 00:19:28,828 INFO L321 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2022-11-26 00:19:28,829 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 1304 treesize of output 913 [2022-11-26 00:19:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:29,073 INFO L321 Elim1Store]: treesize reduction 244, result has 14.4 percent of original size [2022-11-26 00:19:29,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 1117 treesize of output 1075 [2022-11-26 00:19:29,185 INFO L321 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2022-11-26 00:19:29,186 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 1127 treesize of output 1048 [2022-11-26 00:19:29,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:29,894 INFO L321 Elim1Store]: treesize reduction 180, result has 17.1 percent of original size [2022-11-26 00:19:29,895 INFO L350 Elim1Store]: Elim1 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 1004 treesize of output 565 [2022-11-26 00:19:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:30,090 INFO L321 Elim1Store]: treesize reduction 204, result has 13.9 percent of original size [2022-11-26 00:19:30,091 INFO L350 Elim1Store]: Elim1 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 883 treesize of output 740 [2022-11-26 00:19:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:30,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:30,385 INFO L321 Elim1Store]: treesize reduction 560, result has 10.7 percent of original size [2022-11-26 00:19:30,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 772 treesize of output 747 [2022-11-26 00:19:31,611 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:31,617 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:31,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:19:31,659 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:19:31,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:19:31,696 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:19:31,696 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:31,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:19:31,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:19:31,743 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-26 00:19:31,821 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:19:31,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-26 00:19:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:31,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:19:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:31,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:19:31,883 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:31,890 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:31,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:19:32,086 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:19:32,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:19:32,124 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:19:32,125 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:19:32,233 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:19:32,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 209 [2022-11-26 00:19:32,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:32,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:32,371 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-26 00:19:32,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 242 treesize of output 265 [2022-11-26 00:19:32,429 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:19:32,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 231 [2022-11-26 00:19:33,595 INFO L321 Elim1Store]: treesize reduction 142, result has 27.9 percent of original size [2022-11-26 00:19:33,596 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 10 case distinctions, treesize of input 823 treesize of output 721 [2022-11-26 00:19:33,807 INFO L321 Elim1Store]: treesize reduction 142, result has 27.9 percent of original size [2022-11-26 00:19:33,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 731 treesize of output 717 [2022-11-26 00:19:34,121 INFO L321 Elim1Store]: treesize reduction 306, result has 20.1 percent of original size [2022-11-26 00:19:34,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 case distinctions, treesize of input 691 treesize of output 702 [2022-11-26 00:20:01,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:20:05,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3132#(and (not (= (select |#valid| |ULTIMATE.start_main_#t~mem7#1.base|) 1)) (or (not (= |ULTIMATE.start_main_#t~mem6#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem6#1.offset| 0))) (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem6#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem7#1.offset|) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) |ULTIMATE.start_main_#t~short9#1| (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_160| Int) (|v_ULTIMATE.start_main_~x~0#1.offset_135| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_160|) 1) (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_135|) (<= (+ 8 |v_ULTIMATE.start_main_~x~0#1.offset_135|) (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_160|)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_160|) (+ 4 |v_ULTIMATE.start_main_~x~0#1.offset_135|)) 1))) (= |#NULL.base| 0))' at error location [2022-11-26 00:20:05,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:20:05,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:20:05,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-11-26 00:20:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130199379] [2022-11-26 00:20:05,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:20:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:20:05,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:20:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1680, Unknown=3, NotChecked=0, Total=1892 [2022-11-26 00:20:05,968 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:08,333 INFO L93 Difference]: Finished difference Result 344 states and 390 transitions. [2022-11-26 00:20:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:20:08,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:20:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:08,337 INFO L225 Difference]: With dead ends: 344 [2022-11-26 00:20:08,338 INFO L226 Difference]: Without dead ends: 344 [2022-11-26 00:20:08,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=369, Invalid=2598, Unknown=3, NotChecked=0, Total=2970 [2022-11-26 00:20:08,340 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 686 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:08,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 867 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:20:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-26 00:20:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 177. [2022-11-26 00:20:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 140 states have (on average 1.5785714285714285) internal successors, (221), 176 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 221 transitions. [2022-11-26 00:20:08,349 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 221 transitions. Word has length 20 [2022-11-26 00:20:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:08,349 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 221 transitions. [2022-11-26 00:20:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 221 transitions. [2022-11-26 00:20:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:20:08,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:08,351 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:08,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:20:08,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:20:08,558 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:20:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1767732736, now seen corresponding path program 1 times [2022-11-26 00:20:08,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:08,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767485271] [2022-11-26 00:20:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:08,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:09,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:09,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767485271] [2022-11-26 00:20:09,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767485271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:20:09,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881488779] [2022-11-26 00:20:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:09,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:09,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:20:09,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:20:09,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:20:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:09,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:20:09,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:09,478 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:09,576 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:09,610 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:20:09,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 00:20:09,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:20:09,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:20:09,827 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:20:09,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:20:09,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:20:09,866 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:20:09,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-26 00:20:09,949 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:20:09,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-26 00:20:09,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-26 00:20:10,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:10,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:20:10,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:10,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:10,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-26 00:20:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:20:11,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:11,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-26 00:20:11,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:11,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-26 00:20:11,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-26 00:20:11,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:11,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-26 00:20:11,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:11,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-26 00:20:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-26 00:20:11,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-26 00:20:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:11,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881488779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:20:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651417866] [2022-11-26 00:20:11,568 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-26 00:20:11,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:20:11,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:20:11,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:20:11,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:20:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,596 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:11,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:20:11,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:20:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,634 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 21 [2022-11-26 00:20:11,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,656 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:20:11,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,667 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:20:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,681 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 30 [2022-11-26 00:20:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 00:20:11,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:20:11,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:20:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:20:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,848 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:20:11,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-26 00:20:11,890 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:20:11,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-26 00:20:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:20:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-26 00:20:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,975 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:20:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:11,993 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:20:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-26 00:20:12,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:20:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-26 00:20:12,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,127 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:20:12,224 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-26 00:20:12,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-26 00:20:12,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-26 00:20:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-26 00:20:12,325 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:12,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:20:12,340 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:12,373 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:20:12,374 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:12,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:20:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:20:12,409 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-26 00:20:12,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:20:12,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:12,465 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:20:12,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-26 00:20:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:20:12,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-26 00:20:12,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:20:12,523 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:12,530 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:12,676 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:20:12,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:20:12,706 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:20:12,707 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:20:12,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:12,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:12,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:12,804 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-26 00:20:12,805 INFO L350 Elim1Store]: Elim1 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 216 treesize of output 217 [2022-11-26 00:20:12,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:12,845 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:20:12,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 211 [2022-11-26 00:20:12,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:12,897 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:20:12,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 215 [2022-11-26 00:20:13,785 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-26 00:20:13,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 866 treesize of output 753 [2022-11-26 00:20:14,050 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-26 00:20:14,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 694 treesize of output 697 [2022-11-26 00:20:14,219 INFO L321 Elim1Store]: treesize reduction 254, result has 16.2 percent of original size [2022-11-26 00:20:14,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 642 treesize of output 625 [2022-11-26 00:22:17,169 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:22:18,966 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:22:20,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:25,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3835#(and (or (not (= |ULTIMATE.start_main_#t~mem6#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem6#1.offset| 0))) (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem6#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem7#1.offset|) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_169| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_169|) 4) 1) (= (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_169|) 1) (<= 8 (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_169|)))) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) |ULTIMATE.start_main_#t~short9#1| (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (or (not (<= (+ |ULTIMATE.start_main_#t~mem7#1.offset| 8) (select |#length| |ULTIMATE.start_main_#t~mem7#1.base|))) (not (<= 0 (+ |ULTIMATE.start_main_#t~mem7#1.offset| 4)))) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:25,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:25,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:25,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-11-26 00:22:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479110427] [2022-11-26 00:22:25,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:25,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:22:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:22:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1868, Unknown=3, NotChecked=0, Total=2070 [2022-11-26 00:22:25,676 INFO L87 Difference]: Start difference. First operand 177 states and 221 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:28,426 INFO L93 Difference]: Finished difference Result 343 states and 389 transitions. [2022-11-26 00:22:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:22:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:22:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:28,432 INFO L225 Difference]: With dead ends: 343 [2022-11-26 00:22:28,432 INFO L226 Difference]: Without dead ends: 343 [2022-11-26 00:22:28,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=407, Invalid=3130, Unknown=3, NotChecked=0, Total=3540 [2022-11-26 00:22:28,434 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1200 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:28,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 834 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 00:22:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-26 00:22:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 177. [2022-11-26 00:22:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 140 states have (on average 1.5714285714285714) internal successors, (220), 176 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2022-11-26 00:22:28,447 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 20 [2022-11-26 00:22:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:28,448 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2022-11-26 00:22:28,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2022-11-26 00:22:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:22:28,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:28,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:28,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:28,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:22:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1767741834, now seen corresponding path program 1 times [2022-11-26 00:22:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:28,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586590305] [2022-11-26 00:22:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:22:28,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:28,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586590305] [2022-11-26 00:22:28,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586590305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:28,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:28,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:28,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839115203] [2022-11-26 00:22:28,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:28,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:28,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:28,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:28,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:28,705 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:28,767 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2022-11-26 00:22:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:22:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:28,769 INFO L225 Difference]: With dead ends: 180 [2022-11-26 00:22:28,769 INFO L226 Difference]: Without dead ends: 180 [2022-11-26 00:22:28,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:28,770 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:28,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-26 00:22:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-26 00:22:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 179 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 223 transitions. [2022-11-26 00:22:28,776 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 223 transitions. Word has length 20 [2022-11-26 00:22:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:28,779 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 223 transitions. [2022-11-26 00:22:28,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 223 transitions. [2022-11-26 00:22:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:22:28,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:28,783 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:22:28,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:22:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2015615776, now seen corresponding path program 1 times [2022-11-26 00:22:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:28,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268776457] [2022-11-26 00:22:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:28,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:29,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268776457] [2022-11-26 00:22:29,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268776457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752906856] [2022-11-26 00:22:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:29,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:29,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:29,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:22:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:22:29,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:29,354 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:22:29,446 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:22:29,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 00:22:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:29,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:29,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-26 00:22:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:29,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752906856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737623535] [2022-11-26 00:22:29,835 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-26 00:22:29,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:29,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:29,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:29,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:29,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,860 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:29,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:22:29,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:22:29,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,896 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 21 [2022-11-26 00:22:29,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,919 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:22:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,930 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:22:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,942 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 30 [2022-11-26 00:22:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 00:22:30,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:22:30,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:22:30,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:22:30,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,095 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:22:30,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-26 00:22:30,125 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:22:30,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:22:30,155 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:22:30,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-26 00:22:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,194 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:22:30,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,210 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:22:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-26 00:22:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-26 00:22:30,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:22:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-26 00:22:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,375 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:22:30,475 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-26 00:22:30,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-26 00:22:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-26 00:22:30,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-26 00:22:30,569 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:30,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:22:30,581 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:30,615 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:22:30,616 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:30,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:22:30,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:22:30,645 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-26 00:22:30,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:22:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:22:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:30,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-26 00:22:30,727 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:22:30,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-26 00:22:30,756 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:30,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:22:30,768 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:30,954 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:22:30,954 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:22:30,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:22:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:22:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:31,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:22:31,047 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-26 00:22:31,047 INFO L350 Elim1Store]: Elim1 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 216 treesize of output 217 [2022-11-26 00:22:31,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:22:31,099 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:22:31,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 211 [2022-11-26 00:22:31,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:22:31,140 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:22:31,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 215 [2022-11-26 00:22:32,657 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-26 00:22:32,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 1297 treesize of output 1108 [2022-11-26 00:22:32,872 INFO L321 Elim1Store]: treesize reduction 260, result has 14.2 percent of original size [2022-11-26 00:22:32,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 1053 treesize of output 1006 [2022-11-26 00:22:33,112 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-26 00:22:33,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 1035 treesize of output 1006 [2022-11-26 00:26:17,471 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:27:55,001 WARN L233 SmtUtils]: Spent 1.46m on a formula simplification. DAG size of input: 2663 DAG size of output: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:27:56,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4905#(and (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 4)) 0) (<= 0 (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 4)) (< (select |#length| |ULTIMATE.start_main_~x~0#1.base|) (+ 8 |ULTIMATE.start_main_~x~0#1.offset|)) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0))) (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_177| Int)) (and (= 1 (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_177|)) (<= 8 (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_177|)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_177|) 4) 1))) (<= (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 8) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|))) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (<= 0 |#StackHeapBarrier|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:27:56,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:27:56,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:27:56,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2022-11-26 00:27:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921863060] [2022-11-26 00:27:56,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:27:56,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:27:56,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:56,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:27:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:27:56,631 INFO L87 Difference]: Start difference. First operand 180 states and 223 transitions. Second operand has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:57,443 INFO L93 Difference]: Finished difference Result 214 states and 240 transitions. [2022-11-26 00:27:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:27:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-11-26 00:27:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:57,445 INFO L225 Difference]: With dead ends: 214 [2022-11-26 00:27:57,445 INFO L226 Difference]: Without dead ends: 214 [2022-11-26 00:27:57,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 99.6s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:27:57,446 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 757 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:57,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 239 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:27:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-26 00:27:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 179. [2022-11-26 00:27:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 144 states have (on average 1.4861111111111112) internal successors, (214), 178 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2022-11-26 00:27:57,451 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 22 [2022-11-26 00:27:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:57,452 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2022-11-26 00:27:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2022-11-26 00:27:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:27:57,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:57,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:57,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:57,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:27:57,654 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:27:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:57,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2085481638, now seen corresponding path program 1 times [2022-11-26 00:27:57,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:57,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185461440] [2022-11-26 00:27:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:57,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:27:57,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185461440] [2022-11-26 00:27:57,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185461440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:57,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:57,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:27:57,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327357567] [2022-11-26 00:27:57,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:57,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:27:57,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:57,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:27:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:57,854 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:58,045 INFO L93 Difference]: Finished difference Result 191 states and 228 transitions. [2022-11-26 00:27:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:27:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:58,047 INFO L225 Difference]: With dead ends: 191 [2022-11-26 00:27:58,047 INFO L226 Difference]: Without dead ends: 191 [2022-11-26 00:27:58,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:58,048 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 24 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:58,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 233 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:27:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-26 00:27:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 182. [2022-11-26 00:27:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 147 states have (on average 1.4761904761904763) internal successors, (217), 181 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2022-11-26 00:27:58,054 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 23 [2022-11-26 00:27:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:58,054 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2022-11-26 00:27:58,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2022-11-26 00:27:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:27:58,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:58,055 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:58,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:27:58,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:27:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2085489583, now seen corresponding path program 1 times [2022-11-26 00:27:58,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:58,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583475235] [2022-11-26 00:27:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:58,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:27:58,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:58,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583475235] [2022-11-26 00:27:58,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583475235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:58,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:58,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:27:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961944378] [2022-11-26 00:27:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:27:58,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:27:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:27:58,155 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:58,267 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2022-11-26 00:27:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:27:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:27:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:58,269 INFO L225 Difference]: With dead ends: 179 [2022-11-26 00:27:58,269 INFO L226 Difference]: Without dead ends: 179 [2022-11-26 00:27:58,270 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:27:58,270 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:58,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 100 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-26 00:27:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-11-26 00:27:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 147 states have (on average 1.4421768707482994) internal successors, (212), 178 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 212 transitions. [2022-11-26 00:27:58,275 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 212 transitions. Word has length 23 [2022-11-26 00:27:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:58,275 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 212 transitions. [2022-11-26 00:27:58,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 212 transitions. [2022-11-26 00:27:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:27:58,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:58,276 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:58,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:27:58,277 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:27:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2085489584, now seen corresponding path program 1 times [2022-11-26 00:27:58,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:58,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414317331] [2022-11-26 00:27:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:27:58,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:58,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414317331] [2022-11-26 00:27:58,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414317331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:58,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:58,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:27:58,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559803400] [2022-11-26 00:27:58,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:58,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:27:58,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:58,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:27:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:27:58,346 INFO L87 Difference]: Start difference. First operand 179 states and 212 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:58,453 INFO L93 Difference]: Finished difference Result 177 states and 207 transitions. [2022-11-26 00:27:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:27:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:27:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:58,455 INFO L225 Difference]: With dead ends: 177 [2022-11-26 00:27:58,455 INFO L226 Difference]: Without dead ends: 177 [2022-11-26 00:27:58,456 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:27:58,456 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:58,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-26 00:27:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-11-26 00:27:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 147 states have (on average 1.4081632653061225) internal successors, (207), 175 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2022-11-26 00:27:58,461 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 23 [2022-11-26 00:27:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:58,461 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2022-11-26 00:27:58,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2022-11-26 00:27:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:27:58,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:58,463 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:27:58,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 00:27:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash 23491263, now seen corresponding path program 1 times [2022-11-26 00:27:58,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:58,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879208668] [2022-11-26 00:27:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:59,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879208668] [2022-11-26 00:27:59,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879208668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:59,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779876829] [2022-11-26 00:27:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:59,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:59,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:59,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:59,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_896b3cc8-aa95-4e88-801f-b60c54699606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:27:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:27:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:59,559 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:27:59,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:27:59,667 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:27:59,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 00:27:59,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:27:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:59,748 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-26 00:27:59,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-26 00:27:59,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:27:59,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:00,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:00,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:28:00,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-26 00:28:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:00,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:00,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:00,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:28:00,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-11-26 00:28:00,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:28:00,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2022-11-26 00:28:00,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:28:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:00,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779876829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:00,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60804736] [2022-11-26 00:28:00,801 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:28:00,801 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:00,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:28:00,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:28:00,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:28:00,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,828 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:28:00,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:28:00,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:28:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,861 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 21 [2022-11-26 00:28:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,892 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 30 [2022-11-26 00:28:00,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,906 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:28:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,922 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 11 [2022-11-26 00:28:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:00,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 00:28:00,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:28:01,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:28:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:28:01,060 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:28:01,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:28:01,088 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:28:01,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-26 00:28:01,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-26 00:28:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,146 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:28:01,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-26 00:28:01,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:28:01,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 00:28:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-26 00:28:01,304 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:28:01,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:28:01,342 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:28:01,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 93 [2022-11-26 00:28:01,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2022-11-26 00:28:01,475 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-26 00:28:01,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-26 00:28:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-26 00:28:01,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-26 00:28:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:01,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:01,646 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:28:01,646 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 442 treesize of output 367 [2022-11-26 00:28:01,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:01,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:01,718 INFO L321 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-26 00:28:01,719 INFO L350 Elim1Store]: Elim1 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 7 case distinctions, treesize of input 436 treesize of output 438 [2022-11-26 00:28:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:01,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:01,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:01,757 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-26 00:28:01,758 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 434 treesize of output 416 [2022-11-26 00:28:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:02,182 INFO L321 Elim1Store]: treesize reduction 156, result has 13.8 percent of original size [2022-11-26 00:28:02,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 848 treesize of output 814 [2022-11-26 00:28:02,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:02,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:02,530 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-11-26 00:28:02,530 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 1000 treesize of output 829 [2022-11-26 00:28:02,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:02,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:02,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:02,640 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-26 00:28:02,641 INFO L350 Elim1Store]: Elim1 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 1013 treesize of output 971 [2022-11-26 00:28:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:02,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:02,793 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-26 00:28:02,794 INFO L350 Elim1Store]: Elim1 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 1000 treesize of output 966 [2022-11-26 00:28:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:03,467 INFO L321 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2022-11-26 00:28:03,467 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 819 treesize of output 513 [2022-11-26 00:28:03,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:03,682 INFO L321 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2022-11-26 00:28:03,682 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 830 treesize of output 720 [2022-11-26 00:28:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:03,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:03,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:04,028 INFO L321 Elim1Store]: treesize reduction 416, result has 14.6 percent of original size [2022-11-26 00:28:04,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 771 treesize of output 760 [2022-11-26 00:28:05,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:28:05,005 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:28:05,010 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:28:05,044 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:28:05,045 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:28:05,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:28:05,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:28:05,074 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-26 00:28:05,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:28:05,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:05,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-26 00:28:05,142 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:28:05,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-26 00:28:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:05,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:28:05,188 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:28:05,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:28:05,201 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:28:05,437 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:28:05,438 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:28:05,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:28:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:05,644 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-26 00:28:05,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 213 treesize of output 236 [2022-11-26 00:28:05,705 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:28:05,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 202 [2022-11-26 00:28:05,766 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:28:05,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 206 [2022-11-26 00:28:08,125 INFO L321 Elim1Store]: treesize reduction 180, result has 32.3 percent of original size [2022-11-26 00:28:08,126 INFO L350 Elim1Store]: Elim1 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 14 case distinctions, treesize of input 925 treesize of output 834 [2022-11-26 00:28:08,467 INFO L321 Elim1Store]: treesize reduction 372, result has 18.4 percent of original size [2022-11-26 00:28:08,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 817 treesize of output 841 [2022-11-26 00:28:08,773 INFO L321 Elim1Store]: treesize reduction 180, result has 32.3 percent of original size [2022-11-26 00:28:08,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 803 treesize of output 800 [2022-11-26 00:31:18,003 WARN L233 SmtUtils]: Spent 9.15s on a formula simplification that was a NOOP. DAG size: 2154 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)